Fastest 4 cylinders ?

[Mr. Demeanor]

What are the fastest speeds. Engine/boat combo's, etc with four cylinder motors. Stock, modified, tunnel, pad, hydro etc. Post them all.
I've been wanting to ask for awhile and didnt want to sound like I am bragging but think I'm doing pretty good for a stock powerhead.
83.1 is my best on a very cold morning (40 degrees) with perfect conditions in fresh water. In two years and all the events I have been to, I have never found another 4 cylinder to run with. I know there out there though.

If you have some good V4 threads saved, post them and I will add to the list.


GOOD V4 THREADS

Yamaha:

http://www.screamandfly.com/showthread.php?154050-V4-Yamaha-hot-ups&highlight=yamaha+V4

http://www.screamandfly.com/showthread.php?125518-Yamaha-v4-intake-stuffer-report&highlight=yamaha+stuffers



OMC:

http://www.screamandfly.com/showthread.php?240564-OMC-Cross-Charge-Mod-questions&highlight=

[Freddie Webb]

The starflite IV with an omc v4 crossflow ran 130 and change in the late 60's. It was a hydro. There is more information out there but I don't remember all the details.

[Ronster43]

A good OMC ModU would run 120mph in a straight line in the mid-70's. That was a Stinger GT or a Super Strangler on, for instance, an 18' full-tunnel Scotti.

[jphii]

The starflite IV with an omc v4 crossflow ran 130 and change in the late 60's. It was a hydro. There is more information out there but I don't remember all the details.

Don't you have one that runs pretty good? :D

[bruzercomp81]

I got 84 out of my v4 mod 140 on my comp vandal on deer lake after the three lakes races last year. it was one of those perfect condition situations too. if your motor is stock that boat will easily go 90 with a modified motor. nice work!

[Mr. Demeanor]

Keep em coming. Would love to see some pics if you have them. A couple years ago I thouhjt more and more small motors would start showing up. I get 7mpg at cruise and 5.5mpg and a run where I am on it pretty hard.

As far as mods, Im not sure what I want to do with this thing. I could get into the motor and go faster but not sure how much faster I want to go in it. I would be spending money and losing reliability for the sake of speed i would very rarely use. Its nice having a reliable package.
Or, for what that would cost I could easily sell this motor and hang a 15" Merc 200 that would weigh about the same. But then it wouldnt be as unique. There are two boats like mine with V6's. One have a 225X and the other is being rigged with a 300 drag.

Perosnally, I think ScreamandFly needs a V4um :cool:

[bruzercomp81]

Perosnally, I think ScreamandFly needs a V4um :cool:

i think your on to something... :cheers:

[Ronster43]

V4 Stinger on a ModU Scotti in 1974...


265275

[MattGreen]

Chris Lake ("Laker" on here) has a Ventura with various modified OMC looper V4s and runs into the 90s. It is a recreational boat, not a single-purpose race boat.

I would love to see more V4 stuff, I recently sold mine and miss it already. Go boating all day for $ 80 in gas (or less !) !


Matt

[mrtlbeez]

It takes $80 in gas just to fire my V-8!!!!!!!!!!!!!!

[outasite]

In the early eightys I came upon a 16 ft tunnel of some sort.It was running a super strangler,and some kind of quicky unit.It ran a tick under a 100, And being a merc guy it kills me to say It sounded SWEET!

[Superstocker]

i think your on to something... :cheers:

Me too!

[MercNuts]

A good OMC ModU would run 120mph in a straight line in the mid-70's. That was a Stinger GT or a Super Strangler on, for instance, an 18' full-tunnel Scotti.

Not a chance.

[Mr. Demeanor]

Me too!

Well, we could petition :cheers:

[milkdud]

How many cubes is your Yamaha 130? I kinda keep track of what your doing. Im running an old 1500 on my Carlson just under 80. Mine is 99 cubes, are the v-4's the same?
Thanks
C

[Mr. Demeanor]

How many cubes is your Yamaha 130? I kinda keep track of what your doing. Im running an old 1500 on my Carlson just under 80. Mine is 99 cubes, are the v-4's the same?
Thanks
C

My Yamaha 130 is 1730cc's which converts to 105ci

[Freddie Webb]

Joe, thanks for the compliment. The v4 does ok, I guess I need to get it out and knock the dust off it.

[FrenchPhil]

Frankly I'd stay away from the 4 cyls as their power to weight ratio is unfavorable. The Yam 130 weighs 363 lbs ! Any "old" V6 weighs pretty
much the same & delivers a lot more power. If you want more mileage then go 3cyl like the Yam 70 or 90 or Johnson Stinger 75... which have tons of race mods.

[mr fun]

:D when pops was racing I remember the v 4's were I belive 116 cubes and the 2 liter merc v6's were 122 cubes, and were lumped into the same class in some races, and I don't remember any beating us. I have a 140 rude built fresh off an 18' glastron family rig that I'm interested in a little allison or a 17 action to play around with. Bob Pazos I've herd has had some good luck with some v4's according to Bobby. fun out :thumbsup::cheers::cool:

[Mr. Demeanor]

Frankly I'd stay away from the 4 cyls as their power to weight ratio is unfavorable. The Yam 130 weighs 363 lbs ! Any "old" V6 weighs pretty
much the same & delivers a lot more power. If you want more mileage then go 3cyl like the Yam 70 or 90 or Johnson Stinger 75... which have tons of race mods.

The Yamaha 130 weighs 348 lbs.
I have taken a lot of weight out of mine. Removed cowl latching system, oil injection, lightened cowling, removed every nut, bolt, cover, etc. . Removed exhaust can. Its all in a box and if I include the oil that was in the oil tank it weighs just over 50lbs. Yes, I would have more power and could get a V6 down to about 325lbs but this isnt a thread about V6's :D

[jjmalkow]

I run a heavy modded OMC looper V4, 122 cubes,ported, big carbs, dry stacked, and don't even care about gas mileage. Love running it hard and still learning to keep it up on the pad on my Ventura! Mid 70s with a small ear 24 chopper,accelerates HARD,has more but not the best driver yet! Have more props to try just not the time. AND I agree lets kepp this thread about V4s!!!

[Mr. Demeanor]

I run a heavy modded OMC looper V4, 122 cubes,ported, big carbs, dry stacked, and don't even care about gas mileage. Love running it hard and still learning to keep it up on the pad on my Ventura! Mid 70s with a small ear 24 chopper,accelerates HARD,has more but not the best driver yet! Have more props to try just not the time. AND I agree lets kepp this thread about V4s!!!

Pics? Any idea what kind of power your making?
My only mods have been extensive intake stuffing, removing the choke plates, reeds, and when I put put the intake back on I made sure there was no gasket hanging out into the flow and did just a little cleanup. I also removed the exhaust can and dry stacked. The midrange is better than stock but I really wont know about top end until we get some colder weather so I can compare to how it ran before. I dont think I lost any top end but doubt I gained either.
This motor falls on its face about 64-6500rpm. Doesnt seem to matter if I turn a 26 or 30 pitch prop, I get the same RPM.
I dont know if there is more potential with the OMC V4's or they have just been more popular. I think they are lighter out of the box.

[Mr. Demeanor]

PS. Its very cool to get some of you out in the open. I knew you were out there.

V4Forum? Greg....hello?

I sent a message asking about a forum for us. Even offered to moderate it :eek:

[hydrochicken]

Hey everyone ive got a 140 evenrude that busted a skirt on a piston and broke out a little piece of block at the base of the cylinder not the side the flat spot in the bottom anyway was wondering if yall knew a shop that could resleeve and weld it up in florida kinda want to rebuild it to put on an old 16 baja i have thanks

[Mr. Demeanor]

Hey everyone ive got a 140 evenrude that busted a skirt on a piston and broke out a little piece of block at the base of the cylinder not the side the flat spot in the bottom anyway was wondering if yall knew a shop that could resleeve and weld it up in florida kinda want to rebuild it to put on an old 16 baja i have thanks

Call Chris Carson.

[hydrochicken]

Ok how do i get ahold of him not sure who or where he is im still new to this site somewhat

[jjmalkow]

We haven't been hiding think you've been missing us. Alot of us are on the Hydrostream Tour Thread. Riverman just sold his V4 xflow rig that he had over 80mph. Check my albums pics on there!

[Mr. Demeanor]

We haven't been hiding think you've been missing us. Alot of us are on the Hydrostream Tour Thread. Riverman just sold his V4 xflow rig that he had over 80mph. Check my albums pics on there!



I wish some of you came to the same events as I do. There are never any boats under 17' it seems and never any V4's. In fact, in two years I dont think I have ever been to an event, and I have been to a lot of big ones, where there was another V4. In a way, its kind of cool....until I see rooster tails disappearing down the river. If its a little snotty I can run with most of the faster boats pretty well but damn they accelerate hard.


Correction, at Palatka someone showed up with a little hydro / 25hp Merc. that kciked my ass out of the hole.

[Ira Tindale]

We ran a 1987 inline 4 75hp mercury on a 15ft. Viper. It turned a 24 chopper 6400 at 60 mph gps speed. Engine was stock.

[jjmalkow]

Mr D, 3 of us are up in Wisconsin,Bruzercomp,myself,Laker,we're just bit far from ya!

[JWTjr.]

Back in the day, the APBA S class (100-ci V4 or inline 6) kilo tunnel record was set by Barry Woods with a Scotti/KR15m (V4 Strangler) at a little over 116 mph. That was with a full closed bow Scotti. With today's tunnel designs, some fingerporting and other tricks to the engine, and some prop work, 120 might be within reach, but it would take a pretty good effort.

It takes work to get a crossflow V4 to hit 80 on a V-bottom, no matter the boat brand. Back in 1984 I tried to eclipse Louis Collins' JP kilo record he set with a 1500xs/Laser 15' at almost 87 mph. I had mine (stock 1984 Evinrude 140/Laser 16') running in the 83 range with the engine sky high and almost no water pressure. Blew it up twice and never got it over 83 and change. Today my 15' Allison/140 Evinrude combo will run right around 80 set up for roundy-round running but again, it took work to get it there.


Mr. Demeanor's tunnel running 83 with a stock Yamaha is strong. Though the Yamaha has a 5-cube advantage on the crossflow V4, and he's running it on a tunnel, that's still nothing to sneeze at.

Tiger

[BUZZIN' DOZEN]

A buddy of mine had yammy V4 on a Allison SS2000, I don't remember what it ran but he couldn't keep a gearcase on it

[Mr. Demeanor]

A buddy of mine had yammy V4 on a Allison SS2000, I don't remember what it ran but he couldn't keep a gearcase on it

I went through one carrier bearing early on. Replaced it with an SKS bearing and change the fluid ALOT. No problems since (over a year) ... KNOCK ON WOOD!!!


Youve probably seen this. My lower unit early on. That prop ran strong but hopped horribly. Lost water pressure at about 78+mph even with a nosecone. After this is when I went to the transom pickup.

http://www.youtube.com/watch?v=WIXvi33I0o8

[BUZZIN' DOZEN]

Yeah but he was leveragin' a 'lil more boat;)

[Mr. Demeanor]

True. Just an idea. The Yamaha/Toyo bearings are junk. I dont think any of them are made here anymore though.
I think the internals of the small V4 Yamaha gearcase are the same as the V6.

[Forkin' Crazy]

Back in the day, the APBA S class (100-ci V4 or inline 6) kilo tunnel record was set by Barry Woods with a Scotti/KR15m (V4 Strangler) at a little over 116 mph. That was with a full closed bow Scotti. With today's tunnel designs, some fingerporting and other tricks to the engine, and some prop work, 120 might be within reach, but it would take a pretty good effort.

It takes work to get a crossflow V4 to hit 80 on a V-bottom, no matter the boat brand. Back in 1984 I tried to eclipse Louis Collins' JP kilo record he set with a 1500xs/Laser 15' at almost 87 mph. I had mine (stock 1984 Evinrude 140/Laser 16') running in the 83 range with the engine sky high and almost no water pressure. Blew it up twice and never got it over 83 and change. Today my 15' Allison/140 Evinrude combo will run right around 80 set up for roundy-round running but again, it took work to get it there.


Mr. Demeanor's tunnel running 83 with a stock Yamaha is strong. Though the Yamaha has a 5-cube advantage on the crossflow V4, and he's running it on a tunnel, that's still nothing to sneeze at.

Tiger

Wow! Love reading your posts! Not only does the Yami get a "cube" advantage, but it's a looper design too! ;)

[Mr. Demeanor]

I believe Nuedecker has said the 130 Yamaha is actually a 140. It was sold in europe as a 140 but called a 130 here as to not compete with the 150.

[engineermike]

I thought a V4 Evinrude crossflow ran in the 130's back in the '60's. I read the book "Iron Fist", a biography about Carl Kiekhaefer, and they went into this story in detail since Carl was chasing the record at that time. If memory serves, the Evinrude guys had plenty of power to run faster, but the engineers knew the hull was unstable at max speed. They gave the driver specific instructions to not exceed X speed, which was intended to inch the record up just a few mph. The driver's state of mind was questionable and he decided to run it full out. He wound up flipping the boat and getting paralyzed, to later commit suicide. My memory is foggy and I returned the book, but I thought there was evidence he was running about 145 when it flipped. Even if you don't count the 145 as the fastest V4, there are official records in the low 130's.

If somebody has the book on hand, please correct anything that's wrong with the above.

[mr fun]

probably on youtube somewhere, :rolleyes:

[mercace]

Back in the day, the APBA S class (100-ci V4 or inline 6) kilo tunnel record was set by Barry Woods with a Scotti/KR15m (V4 Strangler) at a little over 116 mph. That was with a full closed bow Scotti. With today's tunnel designs, some fingerporting and other tricks to the engine, and some prop work, 120 might be within reach, but it would take a pretty good effort.

It takes work to get a crossflow V4 to hit 80 on a V-bottom, no matter the boat brand. Back in 1984 I tried to eclipse Louis Collins' JP kilo record he set with a 1500xs/Laser 15' at almost 87 mph. I had mine (stock 1984 Evinrude 140/Laser 16') running in the 83 range with the engine sky high and almost no water pressure. Blew it up twice and never got it over 83 and change. Today my 15' Allison/140 Evinrude combo will run right around 80 set up for roundy-round running but again, it took work to get it there.


Mr. Demeanor's tunnel running 83 with a stock Yamaha is strong. Though the Yamaha has a 5-cube advantage on the crossflow V4, and he's running it on a tunnel, that's still nothing to sneeze at.

Tiger

Roger Meekins also ran a V-4/ HydroStream in JP and did very well with it.

[Forkin' Crazy]

probably on youtube somewhere, :rolleyes:


http://www.youtube.com/watch?v=CJasGtLEhwU

[JWTjr.]

Roger Meekins also ran a V-4/ HydroStream in JP and did very well with it.

Roger was one of my "mentors" when I started in OPC racing. Roger was the guy who reassured me about running an OMC in JP against all the Mercs. When my speedometer was only reading between 75 and 77 and the Merc 1500xs guys were all telling me I should stay home because they were all running in the 80s, Roger was the guy who told me they were full of it and to come race anyway...and he was right of course, I was one of the fastest JPs running.

Tiger

[JWTjr.]

I thought a V4 Evinrude crossflow ran in the 130's back in the '60's. I read the book "Iron Fist", a biography about Carl Kiekhaefer, and they went into this story in detail since Carl was chasing the record at that time. If memory serves, the Evinrude guys had plenty of power to run faster, but the engineers knew the hull was unstable at max speed. They gave the driver specific instructions to not exceed X speed, which was intended to inch the record up just a few mph. The driver's state of mind was questionable and he decided to run it full out. He wound up flipping the boat and getting paralyzed, to later commit suicide. My memory is foggy and I returned the book, but I thought there was evidence he was running about 145 when it flipped. Even if you don't count the 145 as the fastest V4, there are official records in the low 130's.

If somebody has the book on hand, please correct anything that's wrong with the above.

you have it right. This was in 1974. The driver, Gerry Walin, had set Evinrude's previous kilo record in 1966 at nearly 131 mph. Jim Merten, driving for Mercury, established a new record in 1974 at just over 136 with a Twister II powerhead on a hydro. Evinrude broke the 1966 record-setting boat out of the mothballs to up the ante on Mercury, and Gerry was again the driver. Story was that he was fighting with his wife at the time and was not exactly "all there"; in addition he was one of those guys who would not listen when told what to do, he was going to do it his way. The engineers and setup guys told him to run just a few mph over the record; that the boat was not equipped to run much over 135. Reportedly, Walin was running well over 150 when he cartwheeled it in front of the small crowd. A Japanese photographer was there with a motor-drive camera and caught the entire sequence frame-by-frame. It ended up in the next issue of Sports Illustrated. Gerry was paralyzed from the accident. OMC spent a lot of money outfitting his house to accomodate him, but in the end he committed suicide. It was a tough ending to the factory top speed wars.

Tiger

[Forkin' Crazy]

I believe Nuedecker has said the 130 Yamaha is actually a 140. It was sold in europe as a 140 but called a 130 here as to not compete with the 150.

Sounds about right. I figure you should be able to get 150 reliable hp out of it.

[Bruster]

Mr. Demeanor,

I've always enjoyed reading your posts. The attention to details and thought process of the variables to eliminate what doesn't work and what does really make a differance. The documentation (especially the video taping) really takes your boat (and posts) to the next level. GREAT JOB!

Anyone can make a little boat and a big motor run fast. It takes a lot of thought, testing and determination to make a smaller motor run fast on the same boat.


What are the fastest speeds. Engine/boat combo's, etc with four cylinder motors. Stock, modified, tunnel, pad, hydro etc. Post them all.
I've been wanting to ask for awhile and didnt want to sound like I am bragging but think I'm doing pretty good for a stock powerhead.
83.1 is my best on a very cold morning (40 degrees) with perfect conditions in fresh water. In two years and all the events I have been to, I have never found another 4 cylinder to run with. I know there out there though.

[gemini]

Well John, after all these years of holding the JP record, I can reveal the secret. I borrowed a thru-hub 30 bent to 32 merc prop from a friend who set the GP record. I found out later he borrowed it from Darris, who set several records with it. Small world, really good kilo prop.

[930turbo]

I wish some of you came to the same events as I do. There are never any boats under 17' it seems and never any V4's. In fact, in two years I dont think I have ever been to an event, and I have been to a lot of big ones, where there was another V4. In a way, its kind of cool....until I see rooster tails disappearing down the river. If its a little snotty I can run with most of the faster boats pretty well but damn they accelerate hard.


Correction, at Palatka someone showed up with a little hydro / 25hp Merc. that kciked my ass out of the hole. I had my Vandal at River Ranch in April but I was there on Friday. I'm sure we'll cross paths somewhere in the near future. Cavit8 also has a Viper in the works with a "nine pages" V-4 that should be getting wet soon. I chose to stick with the smaller boat because they feel like they're going 100+:D I'm currently converting to center-steer / hydraulic to improve lateral balance. I have to take a 40 pound bag of salt with me now to make it even remotely drivable. 73MPH is my best so far.

[JWTjr.]

Well John, after all these years of holding the JP record, I can reveal the secret. I borrowed a thru-hub 30 bent to 32 merc prop from a friend who set the GP record. I found out later he borrowed it from Darris, who set several records with it. Small world, really good kilo prop.

I figured. You were flying, thats fo sho. I needed more horsepower. That's where the XS had it all day over the V4, top end speed. But on a course, the V4 punch more than made up for it.

John

[Riverman]

Good reading guys. Keep uip the good work!

[Mr. Demeanor]

I have some V4 threads bookmarked but they are all Yamaha. If you guys have some good threads saved post the links and I will edit the first post with a list.

[thornl01]

John Tiger,

You mention fingerports , You are talking about a looper aren't you ?, or have you done this in a crossflow ?

Currently building a crossflow for a 15ft allison and am in middle of engine work.

[LaveyT]

I thought a V4 Evinrude crossflow ran in the 130's back in the '60's. I read the book "Iron Fist", a biography about Carl Kiekhaefer, and they went into this story in detail since Carl was chasing the record at that time. If memory serves, the Evinrude guys had plenty of power to run faster, but the engineers knew the hull was unstable at max speed. They gave the driver specific instructions to not exceed X speed, which was intended to inch the record up just a few mph. The driver's state of mind was questionable and he decided to run it full out. He wound up flipping the boat and getting paralyzed, to later commit suicide. My memory is foggy and I returned the book, but I thought there was evidence he was running about 145 when it flipped. Even if you don't count the 145 as the fastest V4, there are official records in the low 130's.

If somebody has the book on hand, please correct anything that's wrong with the above.

Tragic story.

[bruzercomp81]

it is possible to finger port a v4 crossflow. i have it done on mine and it runs better then my stock motor does. there is a pick on the v4 crossflow mod thread i think.

[Superstocker]

I think the finger port pic shown in the V4 mod thread is that of a looper...

[bruzercomp81]

sorry its on the omc crossflow finger ports thread, third page. i dont know if its the computer im on or if the pic doesnt come up anymore....:confused:

[baja200merk]

Where is laker and whats his GPS say? :D

[racerx]

Laker went 94 at 3 lakes in a thousand ft with his 4 banger,if you beleive that...

[baja200merk]

Laker went 94 at 3 lakes in a thousand ft with his 4 banger,if you beleive that...

With what he said he turns a 30p thats believable :thumbsup:

[Mr. Demeanor]

sorry its on the omc crossflow finger ports thread, third page. i dont know if its the computer im on or if the pic doesnt come up anymore....:confused:

Put a link to thread up.

[930turbo]

http://www.screamandfly.com/showthread.php?240564-OMC-Cross-Charge-Mod-questions&highlight=

[Riverman]

it is possible to finger port a v4 crossflow. i have it done on mine and it runs better then my stock motor does. there is a pick on the v4 crossflow mod thread i think.

I don't see any pics of fingerports on thaat thread.

[bruzercomp81]

ill post a pic soon. i just need to find the pic.

[terry taylor]

Was personal bests the point here with rpm,s and prop size? thanks:)

[Mr. Demeanor]

Was personal bests the point here with rpm,s and prop size? thanks:)

Whatever you want to contribute is all good. Mine was turning a 30 Merc labbed cleaver to about 6400rpm with a 2:1 gear ratio.

[jjmalkow]

Mr. D..here's a pic of mine. 16 inch mid too.
265733

[930turbo]

Mr. D..here's a pic of mine. 16 inch mid too.
265733 That thing looks great!

[jjmalkow]

Thanks!! Lots of work the past 2 years!

[rude tim]

I think Chris Ray had the fastest V4. His V4 OMC was a rocket ship he dominated Pro120.

[6Killer]

I think Chris Ray had the fastest V4. His V4 OMC was a rocket ship he dominated Pro120.

:thumbsup:

[delawarerick]

Where is Laker I saw he mentioned he has done a whole lot to a v4. I ran a modded 110 xflow and did not see near the numbers of Mr D but saw 7k many times turning a 23 srx with lots of slip and ill handling:D.Rick

[JWTjr.]

John Tiger,

You mention fingerports , You are talking about a looper aren't you ?, or have you done this in a crossflow ?

Currently building a crossflow for a 15ft allison and am in middle of engine work.

I am referring to a cross flow. Someone nicknamed them "puffer ports" but they're basically rectangular vertical slots with rounded ends milled on the intake side of the cylinder, with matching directional holes in the pistons. This allows more of the air/fuel charge up through and over the top of the piston as it draws upward. It's been done for many years on cross flow V4s and V6s.

John

[Mr. Demeanor]

Cooler weather has started to move in and I have a 32 cleaver ready to try once it gets cold. Prop slip calc and my gut says an 85mph pass is do-able. Conditions will have to be PERFECT.

[brussrude]

My best so far in my allison ss 2000 Exel powered by v-4 looper is 87 mph on livorsi GPS with full tank of gas 24 Gal. (pump gas) with two persons I still hit of 83. Room for a bigger wheel 30P , still looking for one small ear merc chopper.

Bruss

[baja200merk]

My best so far in my allison ss 2000 Exel powered by v-4 looper is 87 mph on livorsi GPS with full tank of gas 24 Gal. (pump gas) with two persons I still hit of 83. Room for a bigger wheel 30P , still looking for one small ear merc chopper.

Bruss

DAM! Thats impressive :eek: is it stock? or mercury stock?

[thornl01]

Can we get some pictures of these ports ?

currently building a v4 & want to build a strong one.

[brussrude]

DAM! Thats impressive :eek: is it stock? or mercury stock?

Slightly modified. what do you rate as mercury stock?

bruss

[930turbo]

My best so far in my allison ss 2000 Exel powered by v-4 looper is 87 mph on livorsi GPS with full tank of gas 24 Gal. (pump gas) with two persons I still hit of 83. Room for a bigger wheel 30P , still looking for one small ear merc chopper.

Bruss a 20 foot boat at 87, and I can't get my 14 footer over 73. I keep thinking I'm going to find that magic bullet that frees up another 10 MPh. No luck so far.

[Mr. Demeanor]

This thread is seriously lacking pics! :D

[engineermike]

131 mph ;)

265830

[Cavit8]

a 20 foot boat at 87, and I can't get my 14 footer over 73. I keep thinking I'm going to find that magic bullet that frees up another 10 MPh. No luck so far.
That's what I was thinking. Allisons must be made of billet helium....amazing numbers! Good work brussrude!

[jjmalkow]

Someone else had an Allison with a 60degree Evinrude 115hp that hauled the mail too,i'll try to find a pic.

[oldschoolltv]

This was my favorite motor on the Ltv it was a 140 looper I bored to the 2.0 spec, no port work just the 1.8 heads, air box off and jetted, the best speed was 82mph gps with a 1:86 lower unit with lwp on it, Matt

http://i11.photobucket.com/albums/a198/MATT8889/ltvv-4.jpg

[jjmalkow]

Nice rig Oldschool!!!

[oldschoolltv]

thanks, this was my dad's fastest v-4, lets say 100+
http://i11.photobucket.com/albums/a198/MATT8889/MIKE003.jpg

[Alan Power]

Interesting thread, Ive just built a light weight 21' foot boat for OCR (Offshore Circuit Racing) and have a Yam 130 on the back. Currently engine is box stock and tired at that.
We did our first race last weekend and did quite well, as it was fairly rough, but some of the other boats just murdered us in the flat.

Looking at doing some work, blueprinting over the winter. We cant use jackplates or LWP's so are fairly limited in those respects. Some of you guys are getting some fairly impressive numbers out of your rigs. What have you done to them? Like to hear lists of mods too! As we're still debating on what exactly we need to do to our motor.
Bearing in mind we dont need a drag motor, we need full smooth usable power and acceleration.

Great thread guys, some pics....

http://i287.photobucket.com/albums/ll140/alanpower_2008/564457_4728880147805_1602508864_n.jpg

http://i287.photobucket.com/albums/ll140/alanpower_2008/p1181574990-3.jpg

[oldschoolltv]

Alan I was just reading the whole post on the race mono you built, that looks like it would be a fun class, Matt

[Alan Power]

Alan I was just reading the whole post on the race mono you built, that looks like it would be a fun class, Matt

Its a great class Matt, and coming from racing V6 mercs in similar classes its just as fun and more competitive. And with the price of fuel and merc rebuilds... And to be honest in racing conditions, the V4's arent that much slower than the mercs!

<iframe width="420" height="315" src="http://www.youtube.com/embed/uFcTSTZb5DA" frameborder="0" allowfullscreen></iframe>

[Mr. Demeanor]

Slightly modified. what do you rate as mercury stock?

bruss

You had me worried for awhile! :D
Was going to test today but the wind is howling.
Any of you cylinder challenged S&F'ers coming to the Suwanee run?

[David]

"Someone else had an Allison with a 60degree Evinrude 115hp"

That was John Tiger running an SS2000 with a 115 Etec in a test for Trailer Boats. He got 76.2 one up with a 26 Laser 2, 70-73 two up (not stated, but based on how my SS runs, I imagine the passenger was in the rear), 80+ with a nose cone and a 30" wheel.

[brussrude]

That's what I was thinking. Allisons must be made of billet helium....amazing numbers! Good work brussrude!

well from what I understand I still need to find the magic bullet too. Some big guys told me that I must be able to get more out of the rig with the modified V4...
I'm working on a 2.2L cylinder now with some other mods ... who knows that will take me to 90 :D

Bruss

[jjmalkow]

"Someone else had an Allison with a 60degree Evinrude 115hp"

That was John Tiger running an SS2000 with a 115 Etec in a test for Trailer Boats. He got 76.2 one up with a 26 Laser 2, 70-73 two up (not stated, but based on how my SS runs, I imagine the passenger was in the rear), 80+ with a nose cone and a 30" wheel.





Thats not the one I was thinking of. Tiger ran a 115hp Ficht on that test. This one is another members Allison,thought it was a GS but not sure, and it had a 115hp Faststrike or Intruder carb motor on it. Anybody out there remember this?

[jjmalkow]

well from what I understand I still need to find the magic bullet too. Some big guys told me that I must be able to get more out of the rig with the modified V4...
I'm working on a 2.2L cylinder now with some other mods ... who knows that will take me to 90 :D

Bruss

Bruss, do you have a pic or 2 to share??

[Mr. Demeanor]

Interesting thread, Ive just built a light weight 21' foot boat for OCR (Offshore Circuit Racing) and have a Yam 130 on the back. Currently engine is box stock and tired at that.
We did our first race last weekend and did quite well, as it was fairly rough, but some of the other boats just murdered us in the flat.

Looking at doing some work, blueprinting over the winter. We cant use jackplates or LWP's so are fairly limited in those respects. Some of you guys are getting some fairly impressive numbers out of your rigs. What have you done to them? Like to hear lists of mods too! As we're still debating on what exactly we need to do to our motor.
Bearing in mind we dont need a drag motor, we need full smooth usable power and acceleration.

Great thread guys, some pics....

http://i287.photobucket.com/albums/ll140/alanpower_2008/564457_4728880147805_1602508864_n.jpg

http://i287.photobucket.com/albums/ll140/alanpower_2008/p1181574990-3.jpg

Alan,
I have removed the chock solenoid and added an OMC primer system. Reeds from Chris Carson and extensive intake stuffing. The holeshot and midrange difference is HUGE! I also have removed the exhaust can and relived the exhaust with four 3/8" holes in the lower unit. She barks now. I had to go from the stock 180 jets to 198's (drilled).
You can do the intake stuffers and epoxy stuff the crankcase side right on the boat. Do that, make sure all the gaskets are clear of the airflow and throw a set of reeds in her.
This is the intake stuffer thread. HUGE difference and will really help you in race conditions.
http://www.screamandfly.com/showthread.php?125518-Yamaha-v4-intake-stuffer-report&highlight=yamaha+intake+stuffers

Pardon my huge sig pic. Trying to resize it....

[outasite]

Aybody ever have a Chrysler four than ran well.I had a 16'sidewinder that I built a 12" pad under I ran a Chrysler 140 on.It ran 70-71 with some kind of Michigan wheel(brass two blade).Then I bought a new 150XS it ran 73-74 with one of the first 24 choppers so not a lot better I kinda liked that 140 it always ran well.Does anyone no how fast the dry stacked racing ones were running?

[83PREDICTOR]

Thats not the one I was thinking of. Tiger ran a 115hp Ficht on that test. This one is another members Allison,thought it was a GS but not sure, and it had a 115hp Faststrike or Intruder carb motor on it. Anybody out there remember this?

I remember reading about it over on the checkmate forum but never saw a pic

[baja200merk]

Alan,
I have removed the chock solenoid and added an OMC primer system. Reeds from Chris Carson and extensive intake stuffing. The holeshot and midrange difference is HUGE! I also have removed the exhaust can and relived the exhaust with four 3/8" holes in the lower unit. She barks now. I had to go from the stock 180 jets to 198's (drilled).
You can do the intake stuffers and epoxy stuff the crankcase side right on the boat. Do that, make sure all the gaskets are clear of the airflow and throw a set of reeds in her.
This is the intake stuffer thread. HUGE difference and will really help you in race conditions.
http://www.screamandfly.com/showthread.php?125518-Yamaha-v4-intake-stuffer-report&highlight=yamaha+intake+stuffers

Pardon my huge sig pic. Trying to resize it....

With this humidity going away this week it sounds like you need to make an early morning pass for 85+ :thumbsup:

[Mr. Demeanor]

With this humidity going away this week it sounds like you need to make an early morning pass for 85+ :thumbsup:

I think 85 is going to take COLD air. I have been on diet for about a month but still weigh about 205 (down from 220ish). I have been trying to convince Torrente to hop in and put up a number. I have no doubt with a light driver it would easily go 85, maybe faster. A passenger kills my top end by 8-10mph. Its very sensitive to weight up front. Oddly, weight in the back doesnt effect speed much at all. A little but it effects handling more than anything. The day it went 83.1 on the Suwanee it even had the speedo pickup tube sticking down. Barely but it was there. I ahve also pickup up some scratches in the running surface that need attending to. I have touched up the bottom but never really went at it with a long board.

[Freddie Webb]

Here is my v4, the best I did with it was 107. I think there is room for improvement. I don't know if it qualifies for this thread (it's not a lake boat), but here it is. I will try to dig some pictures out of my 1969 14' allison.265886

[Mr. Demeanor]

Here is my v4, the best I did with it was 107. I think there is room for improvement. I don't know if it qualifies for this thread (it's not a lake boat), but here it is. I will try to dig some pictures out of my 1969 14' allison.265886

That definitely qualifies. Post some more pics if you have them.

[JWTjr.]

I think 85 is going to take COLD air. I have been on diet for about a month but still weigh about 205 (down from 220ish). I have been trying to convince Torrente to hop in and put up a number. I have no doubt with a light driver it would easily go 85, maybe faster. A passenger kills my top end by 8-10mph. Its very sensitive to weight up front. Oddly, weight in the back doesnt effect speed much at all. A little but it effects handling more than anything. The day it went 83.1 on the Suwanee it even had the speedo pickup tube sticking down. Barely but it was there. I ahve also pickup up some scratches in the running surface that need attending to. I have touched up the bottom but never really went at it with a long board.

Youd be surprised at what straightening and sharpening the bottom will do. I'd wager it will give you gains that will eclipse what the other mods have done combined.


John

[Ron V]

I haven't read through all of the 7 pages here, but I'll just say this. V-6s sound neat and it's cool to have all the power, but even a stock OMC V-4 is AN ENGINE FOR A MAN just based on the sound alone. The induction roar and the howl from the exhaust will always be one of the neatest sounds on the water. My stock 90 hp Evinrude could be heard a mile away and you knew what kind of motor it was before the boat was even in sight.

[brussrude]

265887265888

This is my allison SS2000 powered by V4 looper w shortened mid.

Bruss

[brussrude]

265889265890

two more

Bruss

[brussrude]

265893
Speed run

[83PREDICTOR]

#'s?

Awesome boat!

[jjmalkow]

Very cool Bruss!!! Did you make the hood? Looks clean!! Thanks for sharing!!

[jjmalkow]

Here's my Ventura.

http://i550.photobucket.com/albums/ii419/jjmalkow/FirstpicoftheLooper.jpg

[hydrostreamvking4m]

265887265888

This is my allison SS2000 powered by V4 looper w shortened mid.

Bruss

Now that is Nice...

[brussrude]

Very cool Bruss!!! Did you make the hood? Looks clean!! Thanks for sharing!!

Yes i did

Bruss

[brussrude]

Here's my Ventura.

http://i550.photobucket.com/albums/ii419/jjmalkow/FirstpicoftheLooper.jpg

Nice rig.. what speeds are you reaching?
Mods?
Bruss

[Mr. Demeanor]

Bruss, thats a damn good looking boat.

My Yamaha has a unique howl now that I have the can out. Sounds a lot like a 4 cylinder motorcycle.
Do the Evinrudes have ratcheting gearcases? Thats one of the things I do not like about mine. I have to be careful letting off at speed.

[Mr. Demeanor]

On a side note, I have spent the weekend working on a new patio and stripping more hardware off the boat. I have all the cleats off now and it looks SO much better. I was going to replace them with pull ups but might mount them inside the boat and leave the gunnel clean and flat. I have all the holes filled and gel matched really well. Pulled the speedo pickup off as well. I may hook the speedo up to the water pressure line just to see if it reads.

[brussrude]

Bruss, thats a damn good looking boat.

My Yamaha has a unique howl now that I have the can out. Sounds a lot like a 4 cylinder motorcycle.
Do the Evinrudes have ratcheting gearcases? Thats one of the things I do not like about mine. I have to be careful letting off at speed.

I don't know if OMC ever built large HP engines with a rachted type gearcase. my V4 does not have that, but still need to decrease my speed gradually from . You can't just go flat out and take your foot from the foot throttle. you could be kissing some part of the dash:D


Bruss

[baja200merk]

Mr. D- I have herd the speedo pickup is worth 2mph alone plus putting it in some salt water, you might have reached your goal a long time ago! :D Whats the next step? :o

No OMC case I know of ratchets.

Now if you ask Revinrude he has been over 2x and he swears the ratchet had something to do with it.

You wouldnt think a boat had brakes but I drove Sam's t-1 with an SVS and a non ratcheting case, WOW did it STOP.....


Bassrude- thats one of my favorite boats but I would never expect it to run that good. It is probably great on fuel also, well done :thumbsup:

[brussrude]

Mr. D- I have herd the speedo pickup is worth 2mph alone plus putting it in some salt water, you might have reached your goal a long time ago! :D Whats the next step? :o

No OMC case I know of ratchets.

Now if you ask Revinrude he has been over 2x and he swears the ratchet had something to do with it.

You wouldnt think a boat had brakes but I drove Sam's t-1 with an SVS and a non ratcheting case, WOW did it STOP.....


Bassrude- thats one of my favorite boats but I would never expect it to run that good. It is probably great on fuel also, well done :thumbsup:

Baja- since there are only a few guys that are running V-4 on their SS 2000 information on these set ups is very limited. Almost anyone who owns these boats is using a V-6 . I had been looking around for a while on what is reasonable ... no info at all

Bruss

[baja200merk]

Info on the SS2k is limited no matter what, I have never herd of a faster V4 SS2k. Well, actually I have never herd of another V4 SS. I would love to see a video the v4's sound like a street bike that needs to shift gears :D

[Mr. Demeanor]

Mr. D- I have herd the speedo pickup is worth 2mph alone plus putting it in some salt water, you might have reached your goal a long time ago! :D Whats the next step? :o

My speedo pickup was mounted real high. It stopped working around 50mph when the boat lifted. I had trued removing one screws and turning it to the side to make sure it was out of the water and so no gain. There might be a little gain in another 1/4" up but I am pushing it now. I also never think to get my head down out of the wind when Im really letting her fly.

[jjmalkow]

Info on the SS2k is limited no matter what, I have never herd of a faster V4 SS2k. Well, actually I have never herd of another V4 SS. I would love to see a video the v4's sound like a street bike that needs to shift gears :D

People say they know where I am at all times when I got her screaming!

[Laker]

Here is a screamer!!

http://i281.photobucket.com/albums/kk213/LakerV4/Boat/IMAG1436.jpg

[Laker]

This one will be fun when done too.
http://i281.photobucket.com/albums/kk213/LakerV4/Hustler/IMAG0380-1.jpg

[jjmalkow]

Love the prop on that GT115!! It gonna be a howler!!

[Laker]

265887265888




Nice work Paulo.
The hood turned out nice!

[Laker]

My Personal Favorite...

http://i281.photobucket.com/albums/kk213/LakerV4/Engine%20stuff/2010powertourstoplakekoshjoshphost014.jpg

[Mr. Demeanor]

Now that IS bad aaaassssssss!

[jjmalkow]

It sure is!!!!

[FlowMaxx]

They sure sound sweet at 7??? RPMs. Thanks for the ride today JJ :cheers:


http://www.youtube.com/watch?v=vKuhKaI203c

[jjmalkow]

Anytime Flowmaxx!! Thanks for climbing in!!

[Mark Poole ModVP]

Not the fastest but the loudest!

[Laker]

Not the fastest but the loudest!


Freakin awesome!!!

[Mr. Demeanor]

Ill have to take some video with the open back on my GoPro. My V4 has a very different sound than the OMC's.

[Superstocker]

Not the fastest but the loudest!

Does anyone have video of a Chrysler stacker running?

[Mark Poole ModVP]

Next thing on my list is a GoPro. I'll get some of mine running.

[delawarerick]

Laker good to see you post:thumbsup:

[Laker]

Laker good to see you post:thumbsup:

Thanks Rick! You too! Heard from Charlie?

[jjmalkow]

267052

I found the pic of the Allison SS2000 wit the 115hp Faststrike on The Allison owners board. Info says it runs 70-72. Cool rig.

[jjmalkow]

Anyone have anything to add here? Lets try to keep this one on the first page...

[baja200merk]

My Personal Favorite...

http://i281.photobucket.com/albums/kk213/LakerV4/Engine%20stuff/2010powertourstoplakekoshjoshphost014.jpg

super secret setback :D

[Mr. Demeanor]

Been out doing a little running. Just drilled another set of jets. Been running about 81mph but its still been too warm and humid. This is on a small freshwater lake so the speed is true (no current).
Hoping to get some cold air soon and will have the bigger jets ready if needed.

[930turbo]

Mine is currently undergoing substantial changes. Lots of new parts; fuel pump, bilge pump, gas tank, steering, trim sending unit, etc. lots of etc. I'm also moving the furniture as I'm converting to center steer. Mr. Demeanor, I make the occasional trip to Englewood, I'll look you up on my next visit down your way once the Vandal is back on the water. I agree, let's keep the thread alive!

[Cavit8]

Mine is currently undergoing substantial changes. Lots of new parts; fuel pump, bilge pump, gas tank, steering, trim sending unit, etc. lots of etc. I'm also moving the furniture as I'm converting to center steer. Mr. Demeanor, I make the occasional trip to Englewood, I'll look you up on my next visit down your way once the Vandal is back on the water. I agree, let's keep the thread alive!
I wish you would hurry up with your 79 mile an hour Vandal so you can help me finish my 80 mile an hour Viper.:reddevil:

[Mr. Demeanor]

I think I am going to go ahead and pull the powerhead apart and freshen it up with a mild port clean up and massage this winter. The motor is 18-19 years old and never been apart. I did pull the heads off to have a look and the cylinders are pretty scored around the ports.
I did the speed calculator and adding 20hp would out me at 90mph using my 83mph pass as a base line. It might even be better if I can get it to just breath at higher rpm. Right now it pretty much falls on its face at 64-6500 rpm.
I may also pull the water pump out one clear cold morning and see what it runs. I really dont need one with my transom mounted pickup except at idle.

[930turbo]

I wish you would hurry up with your 79 mile an hour Vandal so you can help me finish my 80 mile an hour Viper.:reddevil: if I can get mine to go 79 and you can still outrun me, I guess I can live with that. :D

[JWTjr.]

I wish you would hurry up with your 79 mile an hour Vandal so you can help me finish my 80 mile an hour Viper.:reddevil:

You should be able to get that Vandal running 80 or better. When I was 14 I bought a new Vandal (1978) and rigged it with a 75 Johnson Stinger, and had it running in the low 60s. We then replaced that with a stock 135 Johnson for JP racing. We had to add a "beak" to the nose because JP minimum length was 15' and the Vandal is only 14'6". This combo was not competitive as the Vandal would not turn as well as the others in the class (Venturas, Allisons, etc.) so I bought a 16' Allison and raced that; I kept the Vandal for fun playing. We modified the 135 Johnson with enlarged ports, Land & Sea large-bore carbs, shaved heads, etc. and finally had it running 83 mph (radar speed) with a 30" Mercury cleaver.

John

[930turbo]

You should be able to get that Vandal running 80 or better. When I was 14 I bought a new Vandal (1978) and rigged it with a 75 Johnson Stinger, and had it running in the low 60s. We then replaced that with a stock 135 Johnson for JP racing. We had to add a "beak" to the nose because JP minimum length was 15' and the Vandal is only 14'6". This combo was not competitive as the Vandal would not turn as well as the others in the class (Venturas, Allisons, etc.) so I bought a 16' Allison and raced that; I kept the Vandal for fun playing. We modified the 135 Johnson with enlarged ports, Land & Sea large-bore carbs, shaved heads, etc. and finally had it running 83 mph (radar speed) with a 30" Mercury cleaver.

John Thanks John, the 30 Cleaver may be key but those things are elusive. I'm stuck on 73 with my current Dunimas (sp) cut 28 chopper. The motor doesn't seem to be inclined to go above 6000. I'll keep trying, the chase is half the fun.

[baja200merk]

I think I am going to go ahead and pull the powerhead apart and freshen it up with a mild port clean up and massage this winter. The motor is 18-19 years old and never been apart. I did pull the heads off to have a look and the cylinders are pretty scored around the ports.
I did the speed calculator and adding 20hp would out me at 90mph using my 83mph pass as a base line. It might even be better if I can get it to just breath at higher rpm. Right now it pretty much falls on its face at 64-6500 rpm.
I may also pull the water pump out one clear cold morning and see what it runs. I really dont need one with my transom mounted pickup except at idle.

Raise and widen them. I picked up almost 20mph going from a fresh stock 225 to my ported motor in identical conditions. It would have been more if I didnt have too much bow lift.

[Cavit8]

if I can get mine to go 79 and you can still outrun me, I guess I can live with that. :D

When we were racing karts they would say there were few things more difficult than going faster than the guy who builds your engines.

[930turbo]

When we were racing karts they would say there were few things more difficult than going faster than the guy who builds your engines.Mclaren does a pretty good job of dispatching Mercedes.

[BarryStrawn]

Mclaren does a pretty good job of dispatching Mercedes.

But the Mercedes F1 team doesn't build either teams engines. They changed the name but the engines are from the former Ilmor group in England.

[Superstocker]

Because this thread deserves to be on the front page at all times, here's a video from last year of my ratride. In the video, I was trying a yamaha drag prop and running a little over 76 mph. I like this prop for all around riding but the 30 cleaver is the fastest for me at 80.4 mph so far.

Excuse the mug...and I actually videoed this with my iphone

http://www.youtube.com/watch?v=MzJ8QonozJk (http://www.youtube.com/watch?v=MzJ8QonozJk)

[jjmalkow]

Very cool!! Thanks for sharing! Got a pic of the whole rig?

[FlowMaxx]

Bad Ass!!

[930turbo]

Because this thread deserves to be on the front page at all times, here's a video from last year of my ratride. In the video, I was trying a yamaha drag prop and running a little over 76 mph. I like this prop for all around riding but the 30 cleaver is the fastest for me at 80.4 mph so far.

Excuse the mug...and I actually videoed this with my iphone

http://www.youtube.com/watch?v=MzJ8QonozJk (http://www.youtube.com/watch?v=MzJ8QonozJk)
What pitch is the drag prop?

[Superstocker]

268415

[Superstocker]

What pitch is the drag prop?[/QUOTE]

27; worked by Baggy's

[Mr. Demeanor]

Good looking rig and she has a nice bark!

I have continued to battle with lower unit issues. Second cracked skeg and now a crack in the housing above the bullet at the back (right above the propshaft). The crack in the housing lines up with the sharp edge inside the housing where the vertical exhaust section comes down and meets the horizontal section of the bullet. I will need to round that off in the future and hopefully avoid the issue. This small lower just wasnt made to run it extramely high and fast like i am.

[pcrussell50]

The starflite IV with an omc v4 crossflow ran 130 and change in the late 60's. It was a hydro. There is more information out there but I don't remember all the details.

my wife's grandparents (and dad), for the metropolitan water district of southern california, and lived at the intake pumping station on lake havasu, where the evinrude crew "lived" during those starflite speed run days. they have a personally autographed book by the president of evinrude from back in that era, as well as some motor stuff the evinrude guys used to give them as thanks for using their quiet part of the lake, (closed off to the public). i'm not clear on the whole story, but apparently, evinrude came out there often for testing this and that. i have a 70's era remote control (with cables and harness) they gave me that's brand new, never used to this day. i'm pretty sure the evinrude guy gave it to the grandparents back in the day, as well as some super fancy lab-grade testing tachometer (would never fit in a dash), that they probably left behind by accident.

anyhow, i wonder if you knew them. there was only a handful of families that lived on that private section of the lake. they were all machinists keeping the big pumps running.

-peter

[evilrude 1]

Because this thread deserves to be on the front page at all times, here's a video from last year of my ratride. In the video, I was trying a yamaha drag prop and running a little over 76 mph. I like this prop for all around riding but the 30 cleaver is the fastest for me at 80.4 mph so far.

Excuse the mug...and I actually videoed this with my iphone

http://www.youtube.com/watch?v=MzJ8QonozJk (http://www.youtube.com/watch?v=MzJ8QonozJk)

superstocker.... you need to make a few more videos!!! You have a very nice ride there! With a healthy sounding x-flow.
Any thing done to the engine ??? sounds real responsive.
The reason I ask is I've just had my 140 finger-ported and am using top pinned KR forged pistons,every thing is balanced and port matched. More porting to be done over the winter too.

Here's hoping mine will run as fast as yours.

[scc82]

ive been working on a v4 looper that should turn some heads on the laser. it is a big bore slider front efi. the boats been in the low 80s with stockpower. not really going for top speed but like to get there fast. hope to be running some drags next season. the laser likes the smaller, less weight v4 instead of v6s but does just fine with a 260merc. weight is about the same but want to build something different. there might even be a bottle hidden up front for a little ballast weight?! ill keep you al posted on progress. weve been very blessed to stay busy at the shop building motors and cutting reeds so toy projects are taking some time, but ive got the itch to put something out there.
happy holidays to all, stan carson.

[scc82]

MR D. when are we going to put a cut down horizontal front on your yami and let it breath. the yamis definetly have a lot of potiential in them. we should mod your cages too.send me a pm and ill get you a set out already done with rubber removed and opened up. should be worth something?
stan carson,

[Mr. Demeanor]

MR D. when are we going to put a cut down horizontal front on your yami and let it breath. the yamis definetly have a lot of potiential in them. we should mod your cages too.send me a pm and ill get you a set out already done with rubber removed and opened up. should be worth something?
stan carson,

Any relation to Chris? I have a new set of CCM reeds that I hope to get the time to install before the Suwanee run next weekend,
Lower unit is back together and my fingers are crossed! I have a 32 cleaver to test with. It should lay down its fastest pass if the weather is good.

[Cavit8]

Any relation to Chris? I have a new set of CCM reeds that I hope to get the time to install before the Suwanee run next weekend,
Lower unit is back together and my fingers are crossed! I have a 32 cleaver to test with. It should lay down its fastest pass if the weather is good.
It's fairly cool and crisp this morning.... go get 'em!

[Superstocker]

superstocker.... you need to make a few more videos!!! You have a very nice ride there! With a healthy sounding x-flow.
Any thing done to the engine ??? sounds real responsive.
The reason I ask is I've just had my 140 finger-ported and am using top pinned KR forged pistons,every thing is balanced and port matched. More porting to be done over the winter too.

Here's hoping mine will run as fast as yours.

Evil1, I'm running standard bore stock pistons in an '81 115 block. 140 exhaust parts were added along w/ a '77 140 adapter & tuner. The carbs are 1 5/16". The cylinder ports have not been raised/lowered. My cylinder heads are uncut 502/503 casting 140 heads. While it's a very basic build, I'm really happy w/ the engine's performance, reliability, and fuel mileage. I've been wanting to build an engine like 930turbo w/ the 9-page help but haven't got around to it yet.

Please post pics of your build; especially the fingerports.

[Mr. Demeanor]

It's fairly cool and crisp this morning.... go get 'em!

Its all back together. Am going to flush the lower with ATF since we were grinding and welding then fill her up with gear lube at let her rip. Hmm...maybe I should leave the ATF in there. We used to run roller bearing drag bike motors (Kaw KZ and Suz GS motors) on straight ATF in the crankcase with never an issue. It was good for about 5hp over 0 weight oil.

[baja200merk]

I would try that at lake jackson before I tried it at suwannee. Considering how long my case lasted on water and coastal 90W Im sure ATF will be fine :p

[Mr. Demeanor]

I would try that at lake jackson before I tried it at suwannee. Considering how long my case lasted on water and coastal 90W Im sure ATF will be fine :p


265hp Suzuki GS Prostock motor plus a shot of big nitrous and it ran season after season on ATF. Bike would run high 7 second passes with no wheelie bars all day long and never showed any signs of lubrication related issues.

[evilrude 1]

Evil1, I'm running standard bore stock pistons in an '81 115 block. 140 exhaust parts were added along w/ a '77 140 adapter & tuner. The carbs are 1 5/16". The cylinder ports have not been raised/lowered. My cylinder heads are uncut 502/503 casting 140 heads. While it's a very basic build, I'm really happy w/ the engine's performance, reliability, and fuel mileage. I've been wanting to build an engine like 930turbo w/ the 9-page help but haven't got around to it yet.

Please post pics of your build; especially the fingerports.

I will post some pics of the finger ports as soon as I get the block back from my friends shop; as for the ports I'm not sure if the "9 page thing" is the set-up I'm looking for right now. I would like to get into drag racing this spring and feel the v6 porting would kill some bottom end.

[930turbo]

I will post some pics of the finger ports as soon as I get the block back from my friends shop; as for the ports I'm not sure if the "9 page thing" is the set-up I'm looking for right now. I would like to get into drag racing this spring and feel the v6 porting would kill some bottom end. I did not change the port timing on my builds. I only followed the nine pages for shaping and the cylinder/piston scallop. The first build has the 1/4" radius corners everywhere, the second one has 3/8" radius corners on the exhaust. I have a very healthy unmolested block that allowed me to do comparisons, kind of like before & after. All of them run the same top speed but the modded blocks get there a ton quicker. I think I have other issues yet to be resolved that are effecting my top speed. The torque @ 4000 RPM's is just incredible.

[930turbo]

I should add that I also have interest in the finger ports. That is the most logical next step.

[evilrude 1]

I too plan on just squaring-up the ports with a 3/8 cutter and stuffing the block as much as I can, especially the transfers and around the reed cages using Devcon.
Another area for filling is the front block half right where the bolts hold the 2 half's together. I think fiberglass mat is what I'm going to use (If needed I can just chisel it off alot easier than if I were to devcon over the bolt recesses.
I should also note that I have taken .060 off the front block half and have port matched and cleaned up all casting imperfections.

I should be getting the block back this week and will def. post some pics.

[racer]

On a finger ported block you also need to modify the deflector on the piston or it does very little to help the engine. Keep the finger as close to the intake side of the block as possible and modify the deflector so it uncovers the finger port. The deflector needs to be cut back from the cyl wall .030, the edge next to the wall is about 1/2 inch thick cut it back to a 1/4 inch making sure the radius on the piston remains, this will help to uncover the finger port and keep the charge on the intake side. Remember when they flow better you will need to increase jet size. I will look to see if I have any pistons like this still around.

[evilrude 1]

Thanks racer
I appreciate any advice you can give me.

[thornl01]

Would really like to see the Finger ported pistons for the crossflow. I am in progress of building a v4 and would like to see any additional " stuff " that has been tested & proven.

Question for Alan Stoker, is the 8 bl set-up work the trouble, or is there something different out there to use ? Boat is 15ft Allison, 90 model 115 block, ( no mods yet) plans are for lots of stuffing, 9 pages porting w/ 3/8-7/16 mill, 135 ex blocks, manifold & heads. Not sure as to ignition of choice yet, as anything that I can get w/ a hotter spark will be considered. I have a 1977 140 tuna to use, but would also like to look @ possibly something on the order of a KR-15 style exhaust manifold. Can a std 135/140 hump be modified to bring the exhaust out of the block to exit into a 235 style adapter to bypass the re-entry to the block restriction ?

[Laker]

Finger ported, scalloped and puffer ported High ring TRW piston.

http://i281.photobucket.com/albums/kk213/LakerV4/Boat/Racepreppiston.jpg

[evilrude 1]

and dont forget the narrowed deflector !!
thanks for the pics laker

[racer]

KR 15 has the exhaust outlet behind the block more like a 235. The 8 barrel set up will help top end a bit but the standard set up acclerates better at least it did on a mod 100 boat.

[Mr. Demeanor]

Just went out and ran the boat after fixing the lower unit and installing new reeds from Chris Carson. I had been running his reeds from a couple years ago and he asked me to try a set using his new material. They are lighter than the ones I had before. The results were great. The weather was not perfect (about 78 and fairly humid. The motor pulled 100 more rpm stopping at 6600 and 77mph with my 28 ET. Thats 2mph faster than it has gone with that prop. I will throw the big cleaver on this weekend!
I have never seen a top end increase from reeds before but these seem to get me more RPM and the motor pulled strong from idle to w/o.

[baja200merk]

GOod news, i have 2 sets of his reeds on the way for my 3.4 etec :thumbsup:

[71V153]

I have never seen a top end increase from reedsMe neither, very cool Chris. Fwiw I managed to squeeze 62.9 outa the Baja 15ss w/140 Johnson Sunday. Spinnin a 13 3/4 x 24 SRX reworked by Burris. 'Bout 58 5900 rpm.

Nice seeing you'n meeting your niece'n nephew on Snake Island awhile back.


Doug

[thornl01]

Thanks Racer for the info.

I am aware that the KR exits outside the block, was wondering if it would be worth trying to locate a KR/KC 'turtle-back' manifold (small miracle) LOL or would it be worth the effort to fabricate a manifold from a stock one to bolt to a 235 style adapter.

Any additional tuner suggestions ? Cone/cowbell/235 style split ? etc..............

[racer]

I might still have a KR powerhead, if I do its a 3.625 bore. I will take a look if interested. The kr block has the small ctr main like the 75 135. The 77 140 tuner is the best on a standard style chest.

[930turbo]

I might still have a KR powerhead, if I do its a 3.625 bore. I will take a look if interested. The kr block has the small ctr main like the 75 135. The 77 140 tuner is the best on a standard style chest.
KR15's are 3.625 bore?

[thornl01]

Orig KR-15s were 3.5 bore
Racer, I would love to have a KR, but most likely not in my budget.
Have thought about a 3.625 motor. Are you willing to share some info on heads for the 3.625?

[930turbo]

I took the Vandal out for a shakedown yesterday. After spending countless hours and dollars on upgrading to center-steer & hydrauling steering, paying close attention to weight & balance and replacing the entire fuel system from tank to carbs, my net gain in speed is ZERO. It still does 73 MPH. How is it that it can be so consistent with all the changes I've made thus far? It did 73 with the stock motor, modded motor and now with the completely reconfigured boat. I've been from 1" under to 1 1/8" over on motor height and tried three different props. 73 it is. What's the secret for 74 guys?

[FlowMaxx]

Try removing the windscreens

[930turbo]

Try removing the windscreens
They are already off. No change there either. The nose does fly lower without the windshield.

[JWTjr.]

what propellers have you tried, and at what rpm does it turn those props?

What is the configuration of your gearcase?

[Laker]

When you say stock VS Modded motor... What modification did you do?

[Mr. Demeanor]

A little video from this past weekend. I had added a very small "pad" to the underside of the Bobs nosecone to increase stern lift by grinding a flat area from the tip of the nosecone back to the skeg. It was about 1/2" wide at the widest section and tapered to nothing at each end. It worked well and got the stern up and cleared the tunnel a little quicker.
Not being able to leave well enough alone :rolleyes: I made it a little bigger. It made the porpoise badly when the tunnel would start to pack air with any trim at all but it did run 80mph with much less trim than usual. Overall the boat was very loose though and I will be taking the pad back out with some epoxy.

I think I touched 77mph in the video running into the current and wind with almost zero positive trim. It was pretty windy as you can see by the rippled area n the water. Usually when I hit those you can see the front end float.

If you go full screen and HD you can read the GPS.


http://www.youtube.com/watch?feature=player_embedded&v=ZlGJvnVmlRc

[Cavit8]

Important to this story is the massive midrange improvement with the modded motors...without any top end improvement.

[Mr. Demeanor]

Important to this story is the massive midrange improvement with the modded motors...without any top end improvement.

How is the bottom of the boat?

[930turbo]

what propellers have you tried, and at what rpm does it turn those props?

What is the configuration of your gearcase? bobs LWP with torque tamer. Two 30 choppers and a dunimas cut 28 chopper. The motor has never exceeded 6000 RPMs. It's like it has a limiter. Gets there quickly, pulls like a tractor from 4000.

[baja200merk]

A limiter would explain it. Will it turn more RPM with a 24 or 26?

[JWTjr.]

The early power packs had no limiters. The later ones (and all replacement packs) are 5800-rpm limited.This is a possibility (i.e. you have limited packs, your tach is off a little, and you're limited to 5800 rpm).

Once you confirm that, the choppers are not the best top end props for that combination and are not going to yield the best top speed results. A 13-1/2" x 27" OMC cleaver (worked by DAH or Mazco, or similar) will be a strong punch prop and also very good for top end. Both 14x28 and 14x30 Mercury cleavers (also worked and of course rehubbed to fit your V4 propshaft) will also be pretty much the best top end props you'll find. Even with a good running stock 140, you should be turning the aforementioned 27" at 6700 to 7000, the 28" at 6500 or so, and the 30" at 62-6400. These props should all get you well into the high 70s to about 80.


John

[racer]

I would verify tach is reading correct. If it is and you have a single box ign with the box in the ctr I would be checking voltage outputs. If a mod engine will not turn over 6k something is wrong.

The kr we ran at 3.625 bore had modified KR heads.

[bruzercomp81]

what set back do you have? it made a huge difference going from a 4" set back to a 2.5" set back jackplate.

[930turbo]

Laker, I squared the ports, cut the pistons & cylinders following the guidelines of the “nine pages”, port timing is unchanged. All casting flash has been smoothed inside the block and it has CCM reeds. Heads are stock 140, 129 PSI compression. I have two 1” relief holes cut in the adapter boot & down housing in the exhaust that allows an additional direct path to the twelve small holes located just above the cavitation plate. I did this in an attempt to remain discrete. I RTV sealed between the boot and down housing to keep the water from entering the exhaust where I cut the holes. Mr D, the bottom was redone earlier this year by AFR with new core, stringers & floor. Baja, I’ve never tried a smaller prop. That’s good idea, I’ll have to locate one with 13 splines and give it a shot. Racer, I’m fairly confident that the tach is accurate. I did some prior testing with a digital tach that allowed me to calculate actual slippage, I came up with 8.22%. If you figure that against 73 MPH with the 28, it’s 5999 RPM’s. John, I have the ’78 ignition with separate packs. They’ve been changed with no improvement in top end. I ordered limiter-less packs – so I’m told. I just bought a 13.5 X 28 Merc cleaver but haven’t tried it yet. Bruiser, I’ve only tried the 4” setback.
I’ll add something else here too. This modded motor has tightened up on me five times. After backing down from a hard pass it starts to bog, I lift, it sticks and skips to a stop. Wait a minute, it starts back up and runs okay. I pulled the heads off tonight and I can see the evidence of the tightness on all four cylinders, the tops of the pistons are fine. I’m running 68 mains with a Facet electric fuel pump and no mechanical pump. I did a fuel deliver test at the motor tonight and confirmed a minimum of 16 GPH delivery rate.
Thanks guys for all your feedback, I appreciate your help on this. Sorry for the long winded post. Tracy

[jjmalkow]

Are you running choke or primer carbs? If primer ones, after a hard pass and during your letting off lay on the primer to get some lube in the cylinders. Some of us run separate "washdown" buttons.

[930turbo]

Are you running choke or primer carbs? If primer ones, after a hard pass and during your letting off lay on the primer to get some lube in the cylinders. Some of us run separate "washdown" buttons. I tried the choke deal after it stuck the first time yesterday. I made several more successful passes but then it did it again. I quit for the day after that.

[thornl01]

Racer,

with the 3-5/8 motor using kr heads, do you think that a set of 3-3/8 (85hp) could be modified to get a good combustion chamber?

Am planning on using a MERC sportmaster gearcase on my v4 to allow for a better selection of props. (comments on gearcase diameter ?

[racer]

The 85 head would not be a good choice better finding a set from a 135. The larger unit may add enough extra drag to offset the better prop selection.

Turbo.
Have you check temp on your engine? Bore clearance? What pistons? Crossflows are not like the looper on decel they dont go as lean depending on carbs. I would be running carbs with a mid range jet not just idle and top like the early ones. Did you coat the pistons? If so are the ring grooves coated? What coating if any?

[thornl01]

Thanks Alan,

Will procede w/ the 135 heads that I have and regroup on the lower unit as I have plenty time to build a lower as boat repairs are still a long way out. ( will use v4 unit w/ V6 propshaft.)

[Mr. Demeanor]

A different view. You can see the handling issues I was having which I am correcting now. It felt much worse and loose than it looks in the video. I hit 79.9mph right at the end of the video but you can hear the motor reving up and down as the boat wasnt hooked up solid. Should have been running a couple mph faster at least. It was a hndful when I got out of it no matter how slow I let off.


http://www.youtube.com/watch?v=ZcOvJ-p2Sdc&feature=youtu.be (http://www.youtube.com/watch?v=ZcOvJ-p2Sdc&feature=youtu.be)

[930turbo]

The 85 head would not be a good choice better finding a set from a 135. The larger unit may add enough extra drag to offset the better prop selection.

Turbo.
Have you check temp on your engine? Bore clearance? What pistons? Crossflows are not like the looper on decel they dont go as lean depending on carbs. I would be running carbs with a mid range jet not just idle and top like the early ones. Did you coat the pistons? If so are the ring grooves coated? What coating if any? I don't know the temp of the motor. Bore is .006-.0065 standard pistons. It has one Pro Marine piston. There's no coating on this motor. The first one is coated, it melted a piston too. It's repaired but has not yet been run. I want to identify the problem first on this motor and apply to the first one. Ideally, I could post success videos like Mr. D instead of searching for speed and reliability. I'll get there some day.Thanks Alan, Tracy

[Mr. Demeanor]

I wish I could help you but I know ZERO about that motor. Sounds like you have some good advice though and please dont think I have not spent a lot of time beating my head against a transom!

[930turbo]

I did have a little fun before calling it quits for the day.
http://www.youtube.com/watch?v=HiOPw9BWyFM&list=UL

[racer]

What are the other 3 pistons? On a cast piston you should be good unless the engine is too cold, what has been done to the cooling? If the engine is not reaching at LEAST 110 degrees it will cold seize. Are the pistons stock weight? Also 16 GPH is marginal for fuel delivery especially checked unrestricted, see how much fuel you get thru a plug that has a 65 jet screwed into it, that should be about the right restriction for your engine and I would not run less than 20 per hr.

[930turbo]

What are the other 3 pistons? On a cast piston you should be good unless the engine is too cold, what has been done to the cooling? If the engine is not reaching at LEAST 110 degrees it will cold seize. Are the pistons stock weight? Also 16 GPH is marginal for fuel delivery especially checked unrestricted, see how much fuel you get thru a plug that has a 65 jet screwed into it, that should be about the right restriction for your engine and I would not run less than 20 per hr.You could be on to something. Ever since I installed the LWP, my water pressure has been through the roof. It buries the gauge past the mechanical stop (35+PSI) on 70+MPH passes. Is it possible the cylinders are clamping down on hot pistons? The other three are stock OMC, I'll assume TWR cast. They should be stock weight with the exception of the skirt scallop. I was on my way into the t-stat housing tonight when I just figured out the only way to get there is to pull the power head. I didn't really want to go that deep if I could avoid it at this point. The warning horn has sounded on two occasions on my way out through the canal to the lake. It's about a five minute idle. I slip it into neutral, free rev it for a minute, it goes away and never does it again for the rest of that day. Nothing indicates the motor has gotten hot such as melted wiring or blistered paint. The tops of the pistons might be a little light but it’s hard to tell because I had that idle back through the canal after Sunday's run just prior to pulling the heads. They are medium grey and dry in the center and very wet and dark around the edges, probably from the 33 pilots in the carbs. Again, I have 68 mains in it currently and 26 degrees total dynamic timing. I'll try the delivery test again with the 65 jet as an orifice. Thanks again Racer

[930turbo]

I feel like I've hijacked this thread. I'll start another in Technical to keep the essence of fastest fours here.

[930turbo]

I feel like I've hijacked this thread. I'll start another in Technical to keep the essence of fastest fours here.

http://www.screamandfly.com/showthread.php?259936-The-73-MPH-wall-in-the-Vandal&p=2410234#post2410234

[pcrussell50]

The 85 head would not be a good choice better finding a set from a 135.

what else is good about the 135? i have a '75 135hp on my "everyday" family boat, a sidewinder clone, 16' sportster sportline, (formerly of paramount, back when the built boats in CA). i'm guessing it has higher compression than some of the newer years of crossflow just because the idle on the muffs is a much more "angry" crackly rasp than my newer ones. at least that's what i'm guessing. in the car engine world you can spot a high compression race motor by the crackle at idle.

which reminds me--i've never heard a clear answer on this, but as long as i continue running my '75 135hp on a family boat, (with the occasional 50+ mph run by myself), not exceeding 6000rpm, can i get away with the weak 92 octane we have here in CA and the colorado river lakes? for a time, i used to mix in leaded 116 race gas, but i'm not sure how important that is.

FWIW, the crossflow you see on the Viper is a frankenrude--made up of pieces of this and that from the crossflow barrel. i have no idea what year it's heads come from but it does NOT have that angry rasp at idle that the 135 has.

-peter

[xb03fs]

Flight Risk...I watched the video and just my observation is that you need more weight on the passenger side. Definatly a slight lean to the driver side, defiantly scrubbing a little mph...to minimize the weight have would need to add, add a seat slider...then you may not have to add any.. Not sure on setback, but a buddy had a fastcat with a 300x..the more setback he ran the better it ran. More setback ran more motor height and less trim. Couldn't tell, but it looked like you have plenty of bow lift. He did too with less setback but he kept running out of water pressure..Going back allowed him to go higher. With less trim. Less trim let it ride on the gearcase better.

The unlevel load was what was most alarming. Since it is a tunnel you probably dont notice it so much at rest and may not feel it or it could be the ill handling you were mentioning. I recommend a seat slide..

[Mr. Demeanor]

Flight Risk...I watched the video and just my observation is that you need more weight on the passenger side. Definatly a slight lean to the driver side, defiantly scrubbing a little mph...to minimize the weight have would need to add, add a seat slider...then you may not have to add any.. Not sure on setback, but a buddy had a fastcat with a 300x..the more setback he ran the better it ran. More setback ran more motor height and less trim. Couldn't tell, but it looked like you have plenty of bow lift. He did too with less setback but he kept running out of water pressure..Going back allowed him to go higher. With less trim. Less trim let it ride on the gearcase better.

The unlevel load was what was most alarming. Since it is a tunnel you probably dont notice it so much at rest and may not feel it or it could be the ill handling you were mentioning. I recommend a seat slide..

I was loaded pretty heavy with fuel, tools, extra prop, cooler, etc for a 70 mile run so that was all over the place. It normally runs pretty flat. I had more setback and it ran worse. More setback meant I needed to raise the engine higher. I have no problems with water pressure as I pick it up off a very small transom mounted pickup that only stick down 1/16" below the sponson.

[bruzercomp81]

what else is good about the 135? i have a '75 135hp on my "everyday" family boat, a sidewinder clone, 16' sportster sportline, (formerly of paramount, back when the built boats in CA). i'm guessing it has higher compression than some of the newer years of crossflow just because the idle on the muffs is a much more "angry" crackly rasp than my newer ones. at least that's what i'm guessing. in the car engine world you can spot a high compression race motor by the crackle at idle.

which reminds me--i've never heard a clear answer on this, but as long as i continue running my '75 135hp on a family boat, (with the occasional 50+ mph run by myself), not exceeding 6000rpm, can i get away with the weak 92 octane we have here in CA and the colorado river lakes? for a time, i used to mix in leaded 116 race gas, but i'm not sure how important that is.

FWIW, the crossflow you see on the Viper is a frankenrude--made up of pieces of this and that from the crossflow barrel. i have no idea what year it's heads come from but it does NOT have that angry rasp at idle that the 135 has.

-peter

I have heard the old style bubble off of the 135s can be moddified to fit the newer style motors and help alot with acceleration.

[thornl01]

Att Laker:

Would like to as a few questions regarding the piston Picture you posted.

Is the rectange port above the w-pin being used w/ the finger-port in the block ? and with the scollops in the piston & block, why the round port above the scollop ? Or am I trying to read too much into the picture ?

have fingerported many loopers, just trying to be sure I transfer the knowledge to the cross flow & NOT SCREW UP >

thanks

LT

[Laker]

Att Laker:

Would like to as a few questions regarding the piston Picture you posted.

Is the rectange port above the w-pin being used w/ the finger-port in the block ? and with the scollops in the piston & block, why the round port above the scollop ? Or am I trying to read too much into the picture ?

have fingerported many loopers, just trying to be sure I transfer the knowledge to the cross flow & NOT SCREW UP >

thanks

LT

​The finger port on an OMC cross flow is used as a reliability enhancer as much as to produce better power.
The port placement above the wrist pin (And matching ports in the block) pushes its charge over the piston ears and provides much needed cooling in that area. That along with reliving the ears as specified in the 9 pages, results in a motor that can be ran Hot and relatively lean to produce more power.
The puffer type port above the scallop is another avenue to get the intake charge up and round the piston and a boosting stream headed in the correct direction. I don’t know how effective this is but I have seen it employed on other engines as well.

[thornl01]

Thanks !

[930turbo]

I was loaded pretty heavy with fuel, tools, extra prop, cooler, etc for a 70 mile run so that was all over the place. It normally runs pretty flat. I had more setback and it ran worse. More setback meant I needed to raise the engine higher. I have no problems with water pressure as I pick it up off a very small transom mounted pickup that only stick down 1/16" below the sponson.loaded heavy and 79.9 MPH.....ur killin' me. :D

[Laker]

loaded heavy and 79.9 MPH.....ur killin' me. :D

Hey bruzercomp... What Speeds were you running with pump gas heads??? ;)

[baja200merk]

Not the fastest 4 banger but Here's beef hanging out Bobbys viper saturday night. Running next to him it ran 70-75. It ran dam good considering bobby took a wild guess at motor height, has no low water pickup, a bondo torque tab, single cable steering, busted motor mounts and a 30p chopper II turning 5400 on the rev limiter.

We are moving the motor up, plugging the water pickups, installing a water pressure gauge and putting my 34ET on it next time out it should run around 80 on the limiter if it will twist it. Not bad for an old bone stock 115 off a friends flats boat :D Yes the viper is LIGHT ;)


http://youtu.be/SvwJhrOCKpQ

[pcrussell50]

In a previous response racer/al mentioned that he preferred 3-circuit carbs on crossflows. Is that for performance reasons? Or more that the progression is smoother for the recreational boater from one circuit to the next.

-peter

[Cavit8]

Cool video....nice Viper! :cheers:

[BeefKid]

<iframe width="420" height="315" src="http://www.youtube.com/embed/SvwJhrOCKpQ" frameborder="0" allowfullscreen></iframe>

dono why it changed the vid

[Mr. Demeanor]

Looks great Beef. I need to come hang out up there some time.

[baja200merk]

Looks great Beef. I need to come hang out up there some time.

If you come up bobby says hes snipping the limiter and or running the 34 :D :p

[bruzercomp81]

Hey bruzercomp... What Speeds were you running with pump gas heads??? ;)

right around 84 mph. could get a few more mph if i jetted up a size and found a bigger prop. :D

[Mr. Demeanor]

If you come up bobby says hes snipping the limiter and or running the 34 :D :p

As long as I get to try it :cool:

[baja200merk]

Have at it :thumbsup:

[jjmalkow]

right around 84 mph. could get a few more mph if i jetted up a size and found a bigger prop. :D

Yeah buddy!

[930turbo]

right around 84 mph. could get a few more mph if i jetted up a size and found a bigger prop. :D What size mains were you running? What was your propshaft height @ 84MPH? What fuel pump/pumps were you running. Was your airbox cover removed?

[bruzercomp81]

66s, 1.5 inches below the pad, stock fuel pump, and it was an air box with the cover removed and a little extra....:D

[jjmalkow]

Come on guys!!!!! 2nd page??? I know its winter in some parts but lets try to keep this thread alive. 930Turbo sorry to see you selling your rig, and sorry to hear about your loss of a buddy,hang in there!!

[Mr. Demeanor]

Ill be trying the 32 cleaver soon but the weather is still too warm here to put up a big number. My guess is 82-3 or so.
I need to get Torrente to drive it. The weight difference alone should be worth 2-3mph.

[baja200merk]

We were going to put the 34 on the viper but the kid that owns it ground 1/2 the skeg off when he pulled it out last weekend. Rookies :rolleyes:

Hope to have it sewed back up this week with a new torque tab and plug some water pickups. I dont ever remember 4 cyls being so much fun :D

[Mr. Demeanor]

I plugged the numbers in for the 34 and I get 85mph which is the same I get with the 32 plugging in the numbers and figuring rpm off my 30. Is your 34 a 14.5"? What kind of cleaver is it?

[BeefKid]

our 34 is a 15"

[baja200merk]

And it's an ET not a cleaver. Cleavers cruise like ass under 80. Mrs would not be happy lol

[racecar001]

I purchased the scat cat from Lenny (flatsleek). I don't get to test until spring. I have a T-H marine nose cone, torque tab, a bobs 4-1 jack plate 2 1/2" setback, dual rack steering and a Mr. Demeanor designed transom water pickup!! The boat currently runs 50-55mph and chine walks a bit too much for any more speed. I cant wait to go faster safer!

[Mr. Demeanor]

I purchased the scat cat from Lenny (flatsleek). I don't get to test until spring. I have a T-H marine nose cone, torque tab, a bobs 4-1 jack plate 2 1/2" setback, dual rack steering and a Mr. Demeanor designed transom water pickup!! The boat currently runs 50-55mph and chine walks a bit too much for any more speed. I cant wait to go faster safer!

Do you mean porpoises or chine walks?

[Mr. Demeanor]

our 34 is a 15"

15 wont fit on mine. 14.5 barely fits!

[racecar001]

It bounces side to side, not bow up and down. chine walk right?? The boat currently has a huge cavitation plate on it that Lenny was trying out. I was only out in it for a 15min's or so per the flipping cold weather. It is great out of the hole but when it starts going 50ish it gets too unstable to WOT. The plate could very well be under water and causing the problem per the motor is lower then ideal. It currently has a uflex signal cable steering, but does not have much play. I just wanted to try it before I changed a bunch of stuff. Damn winter

[baja200merk]

15 wont fit on mine. 14.5 barely fits!

I'm waiting for Ron hill to make me a 34-36 ET that will be 14.5. Ill let you know when he gets it done :thumbsup:

[Mr. Demeanor]

Looks like cool weather moving in this coming weekend. :D
Hopefully it wont bring wind.

[racerx]

Well mr Demeanor sounds like you have a fast 4 banger for stock,beats all above omc with built to the moon motors,except the one on the Allison,you want to sell your boat??

[jjmalkow]

Liberals suck

[Laker]

Liberals suck

The worst come from Illinois

[Mr. Demeanor]

Well mr Demeanor sounds like you have a fast 4 banger for stock,beats all above omc with built to the moon motors,except the one on the Allison,you want to sell your boat??

I probably average one PM every couple months or so asking that. For now, I am having too much fun.

I would love to see what one of these hopped up motors would do on my hull. I am going to do some mild mods to mine but its fast enough really and I want to retain a lot of reliability. I have been hurt....bad, doing the things I enjoy. Maybe finally getting a little wiser....?

[baja200merk]

Liberals suck

hahaha! :thumbsup:


I probably average one PM every couple months or so asking that. For now, I am having too much fun.

I would love to see what one of these hopped up motors would do on my hull. I am going to do some mild mods to mine but its fast enough really and I want to retain a lot of reliability. I have been hurt....bad, doing the things I enjoy. Maybe finally getting a little wiser....?

Chris, the sarcastic Racerx has no actual interest other than to poke at the OMC camp. He obviously cant figure out how to play the video of the Mercury powered viper and therefor forgot to mention the 15mph you have on it :thumbsup:

Computer illiteracy should be considered a handicap, parking pass and all ;)

[racerx]

No problem mr Demeanor you run great numbers for that little boat and handles the rough water great,Baha i have nuthin against omc i own one and have owned a bunch in life,i know the vipers up north with mercs on, them Chris is in the way slow arena with them,probally why he never runs at the events,there isnt a omc up north hear that can run with a merc out on the lakes period....So i dont know what your talkin about,just tellin mr Demeanor his boat runs great for a stock 130 compared to the 4 bangers up hear,no offense guys..

[Mr. Demeanor]

Its all good. My motor is nothing special. I think the boat is though. Cannot figure out why there are not more like it.
When I get out next I will take the GoPro and make sure you can see the GPS. I know there is at least one guy around here who doubts I can crack 80mph.

[jjmalkow]

I Have no doubts!!! Glad to all your progress! I'm knocking on the 80+ door, but it'll be a long winter here.