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  1. #31
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    Man I would hate to see the fuel bill feeding those 3 V8's, but sure would like to see a video of it running WFO!!!!

  2. #32
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    Iam doing a 3.6 with ai stoker i cant wait to here it iam hoping foe about 400 hp in mine they are gas pigs will you need racing fuel ???
    Adrenaline junkie for life

  3. #33
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    Quote Originally Posted by ken2 View Post
    Yea, if they are beefed up to 400 HP, maybe it will.
    Using 1200 on the calculator show 92 MPH.
    The question is, will that hull go 60 with twin 250s ?

    I hope it hits 88
    Funny, R&R Prop's calculator said the exact same speed.

    Quote Originally Posted by rapidcraft22 View Post
    Iam doing a 3.6 with ai stoker i cant wait to here it iam hoping foe about 400 hp in mine they are gas pigs will you need racing fuel ???
    Nope running 93. It's a fishing boat.....
    True Viking
    Scarab 34 SS with Triple OMC 4.0 V8's

  4. #34
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    subscribed

  5. #35
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    I used my boat at 7000# on the calculator, and needed to use a "hull factor" of 225 to get the speeds right. Kim, see what it comes out with your factors and 225 for "hull factor".

    I also subtracted 11% from my engine dyno hp to account for prop shaft output.
    Keith-

  6. #36
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    I wish I knew the weight of my action (no lightweight) because I gained around 16+mph going from stock stock 225 to a ported motor that made 312 on monty's dyno (now Sam's). Only thing that was changed was the powerhead, same prop, same boat, same weight, same conditions, same lake, same heat, same engine height etc....
    Quartershot T-3R 15" 3.5L E-Tec 1.62 Sportmaster


  7. #37
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    Quote Originally Posted by STV_Keith View Post
    The rule of thumb says 1gph per 10hp, so roughly 38gph per motor. I do have a Lowrance LMF-400 gauge in the boat, but the first of the fuel flow meters are just now on their way to me. When I did the testing with the LMF-200 temp unit I had before, I was only interested in cruise. I cringe to know what it burns WOT.
    Thanks for the information Keith. Now I can see why you are so keen to get your engines injected. How is that injection project coming along???????
    Wellcraft Nova 230 XL, 300hp Johnson.
    Seahawk 45 Sport Fisher, twin 306hp Volvo.
    Steadcraft 28, Yanmar 300hp. Sold.
    Markline 800, Volvo 300hp. Sold.
    Haines Hunter V19, Volvo 170. Sold.
    16ft 6in Figlass Sidewinder, 140 Suzuki. Sold.

  8. #38
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    What kinda injection Keith? I refuse to go with the usual dinosaur map-less tuned stupid lil box with button, an affordable sequential system with a laptop would be sweet....
    Quartershot T-3R 15" 3.5L E-Tec 1.62 Sportmaster


  9. #39
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    No fuel injection going on here...way outside the budget.
    Keith-

  10. #40
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    Quote Originally Posted by STV_Keith View Post
    No fuel injection going on here...way outside the budget.
    Same boat....
    Quartershot T-3R 15" 3.5L E-Tec 1.62 Sportmaster


  11. #41
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    I have been talking with monty about doing mega squirt to try and put togather a package that is not crazy expensive.

    http://www.megasquirt.info/

    I have ran there stuff before it works really well for the person that wants to build a full system. But i have only ran it on cars with EGT and wide band with a base map to start tuning on with a dyno. Seeing we can only really get EGT on these V8's and i have no dyno to run the boat out i think i could hurt a motor before getting it setup right.
    http://i35.tinypic.com/epn6ma.jpg

    Just a little Cat.

    24 Twister V8 E-Rude (For Sale)

    2008 Concept Sport Deck 2x 300X

  12. #42
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    with EGT probes through rifled head studs into the exhaust ports should keep you from hurting it. Well the v8s do have a bridge which might change the reading a bit, monty would know. I'd be interested in tuning with a lap top instead of a stupid lil box with a couple buttons on it (SDS).
    Quartershot T-3R 15" 3.5L E-Tec 1.62 Sportmaster


  13. #43
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    If one of us could get one going with a cheaper non race ecu it would be nice because then we would have base maps others could build wild motors off of. I think i am going to go this way but with the wife in school i don't know if the budget will allow for it. I know my motor has a never ran as good as it should but i have never been able to find the issue and just putting parts on it until i find it just seems dumb. With a standalone ecu i can data log as i run and have a lot more information to go on other then the plugs look good.
    http://i35.tinypic.com/epn6ma.jpg

    Just a little Cat.

    24 Twister V8 E-Rude (For Sale)

    2008 Concept Sport Deck 2x 300X

  14. #44
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    Going back Brucato was working on a system that looked real good. I believe he had the setup running on his boat - not a V8. Someone in S&F has already implemented an injected V8 and could help out. In u-tube there is a MoTeC system running on a V8 already. Mega Squirt looks like a very cost effective homemade system, but it is going to require lots of work to integrate and make it work. What would be great, I think is a self tune system like FAST (Fuel Air Spark Tech). I do not know if it can be done without A/F metering.

  15. #45
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    A complete bolt on system that takes care of fuel and spark would be very nice on the V8's. However, there just isn't a big enough market for it so I think I'm stuck with the old carbs and stock ignition system.
    True Viking
    Scarab 34 SS with Triple OMC 4.0 V8's

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