Need ideas for a light,short mid for a v4 crossflow

[ChrisCarsonMarine]

Slightly modded v4 going on a light allison,was going to use a standard clamp/trim and a 16 taylor mid...weighs about what the powerhead does.Anyone have anything or a good plan for a lighter setup,needs trim but not tilt...thanks,Chris

[loop]

Chaz could fab something really nice

[loop]

Im building this for mine
not proud of it but it'll do what i want
short and light enough. about $50 in mostly scrap metal

[ChrisCarsonMarine]

???????

[olboatman]

Im building this for mine
not proud of it but it'll do what i want
short and light enough. about $50 in mostly scrap metal

Great start! Are you going to use an exhaust snout out the back or a tuner to the LU? Trim ran inside jack/set back plates? Sorry about hi jack Chris:(....just had to ask!:o Gary

[BarryStrawn]

I don't think there are any easy solutions. But I recall there were some Mercury 12" midsections used under V4 crossflows in the old APBA Formula-V back when engine mods were more or less unrestricted. Believe they just milled a new exhaust adapter from solid that bolts to the powerhead but has the Mercury bolt pattern on the bottom side. Then either use a Merc SSM or adapt a shiftable using the normal methods.

Back in the day, we shortened my Allison 16 V4 mid by 7.5". I plan to rebuild it over this winter and re-fabricating all the transom and swivel parts. This is a lot of work. I don't know of anyone doing this commercially.

[H2OPERF]

Like was said above no real easy/cheap/light way out. A cut down omc mid isn't that heavy,make a sheet metal/angle mount bracket/jack plate with a trim cyl and a pump in the boat. For a v4 you could probably go with 3/8 instead of 1/2 on most of the pieces or do some custom milling lighten it up a bit, that will get rid of the heavy oem mount brackets and a big heavy jack plate made for a v6. Dave

[flabum1017]

Break out the hole saw......

[loop]

Great start! Are you going to use an exhaust snout out the back or a tuner to the LU? Trim ran inside jack/set back plates? Sorry about hi jack Chris:(....just had to ask!:o Gary
Thanks
yes the tuner will go out the rear not thru the LU. Trim cyl is inside the set back plates. Didn't want to go thru the transom if I could avoid it but I'll do it if necessary to make it run and handle right

[racervboat]

I make mine using a 5-6 inch set back 2 piece jack plate with a merc 70s-80s trim ram with home made brackets for swivel bracket and transom to mount the ram and the pump in boat.Works great and raced it in formula-v mod for 4 yrs with out one single issue,but the draw back is trim only no tilt but was not an issue for me.

[racervboat]

If I come across a donor crossflow mid this winter I thinking of doing a 12 inch just for something to do {long winter in mn} even with my 15 inch I was still 3 inches above transom on my 15 ft pacecraft and 16 ft allison

[racervboat]

pic of allison

[racervboat]

was in process rigging it note missing steering arms.ran it @ 85mph gps handled great and trim worked flawlessly.

[racervboat]

kinda hard to see the motor height.

[ChrisCarsonMarine]

I make mine using a 5-6 inch set back 2 piece jack plate with a merc 70s-80s trim ram with home made brackets for swivel bracket and transom to mount the ram and the pump in boat.Works great and raced it in formula-v mod for 4 yrs with out one single issue,but the draw back is trim only no tilt but was not an issue for me.
Nice,any chance to get some close-ups,that would work fine for our project,Chris

[H2OPERF]

I am making this for my v6 probably could go down a gage for a v4, used gr23 titanium for the tilt tube.Dave

[Instigator]

Like was said above no real easy/cheap/light way out. A cut down omc mid isn't that heavy,make a sheet metal/angle mount bracket/jack plate with a trim cyl and a pump in the boat. For a v4 you could probably go with 3/8 instead of 1/2 on most of the pieces or do some custom milling lighten it up a bit, that will get rid of the heavy oem mount brackets and a big heavy jack plate made for a v6. Dave


Agreed.

I've done both a couple times and a cut down OEM mid is much lighter than a Taylor 16".
And I think more attractive.

[Farmer]

Skeleton mid looks awesome.

Loop,

Can you give the weights of stock vs your skeleton and more pictures when your finished with it?

Can you give information on the fiber cowling?

Thanks

[Freddie Webb]

361255

[olboatman]

361255

What a work of art....now ya got me droolin!!! Gary

[ChrisCarsonMarine]

thats it

[racervboat]

Well im not saying freddy set up aint cool and all BUT to me it looks like the whole motor[powerhead pan hood lower unit] is only supported by that one piece of vertical tubing? might work for speed runs in calm water but turning sharp and or in rough waters boy if that weak spot failed and the whole motor fell off someones going to get real hurt or worse. jmho

[racervboat]

Another note is that the front on the powerhead skeleton that comes to a point at 4 spots that's welded to the vertical tube is what im talking about be very prone to cracking as the leverage of the rest of the motor would be very hard on those 4 points , anyone agree?

[olboatman]

Another note is that the front on the powerhead skeleton that comes to a point at 4 spots that's welded to the vertical tube is what im talking about be very prone to cracking as the leverage of the rest of the motor would be very hard on those 4 points , anyone agree?

Ken I see the point you are making and isn't that tube the swivel point for steering? Very nice workmanship and owning one of your shortened v4 mids I can say your work is flawless also! Gary

[CNC_Guy]

I believe Freddie's mid is for a drag hydro. I'm sure there will be more critical bracing.

[home made tunnel]

im building this for mine
not proud of it but it'll do what i want
short and light enough. About $50 in mostly scrap metal

that.is.awesome

[racervboat]

im sure its a mock up but its a untested rig??? Freddie will have to chime in.It still needs a top v-4 adapter plate to accept the adapter plate and water tube and tuner,and a adapter plate to mount the lower unit to it and it looks like it does not swivel at the vertical tube ???. By the way thanks gary. ken

[racervboat]

ccm needs to chime in on what he wants to do with a lightweight v-4 mid, ???? race .lake racer,drag hydro,all around use? for you our a customer???

[Chaz]

This is one I did for JPEROG about two years ago .
Chris supplied the circular pattern reeds for the power head .
It is a 3 cyl , 60 or 90 , dependin on which way you put the decal on ... ;)
It was pretty labor intensive . I had to do a set back because @ 15" the lower ran into the trim cyl .
With the swivel shortened to 15" the side rubbing blocks didnt line up , so it needed to do ears and tabs .
The mounts were shot , so we made new ones .
The nose cone was too big for the little housing , so it took a little fitting to make it work .
In my book , the can should be welded inside and out , this one was no exception .
I think some time last year he bought a 115 HP Opti powerhead and slipped it on this mid .. his little Whaler handles good and hauls azz ... :thumbsup:


http://s217.photobucket.com/user/TubeCarz/slideshow/Daytona?sort=3

[thornl01]

Go over to FB & look For Dusty Foskey posts.

he is a welder & has fabricated one nice mid.

3 cylinder PH w/ kr/v4 lower unit SLICK !

[76horizon]

I have a 14" crossflow using merc champ trim pictures on hpbcanada if you want a look. Project section of forum . Not the lightest but looks very factory looking

[kasshark]

This is slightly off subject, but I'm curious what reed cages is best to run in the V4 crossflow.