Quote:
Originally Posted by enkeivette
Haha. Wow, you're a master of all trades. Don't have the boat, just flirting with the idea. I have the SBC, but no drive either. Boat will most likely be a Tahiti. ![](http://www.hotboatpics.com/pics/data/500/709P8120088-med.JPG)
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No, but my dad built an engine for his 21ft tri hull that had a jet drive and I know what mistake he made. He built a 460hp 355 SBC that made it's peak horsepower at about 7000rpms. The problem was the impeller was designed for lower rpms and the engine wouldn't rev past 5200.
What is the boat going to be used for? If it's just for going out to have fun and to ski with I would build the engine to make peak horsepower in the 5500-6000rpm range. If you just want to go as fast as you can then move it up to the 7000-7500rpm range. Unlike my dads boat that 17ft boat is light and with the V hull will get up on plane quickly.
If you just want it to ski and cruise with I would go with an Edelbrock Performer RPM intake and the following Comp Cam cam.
Part Number: CCA-12-240-4
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,600-5,800
Duration at 050 inch Lift: 226 int./236 exh.
Advertised Duration: 270 int./286 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.480 int./0.489 exh. lift
Lobe Separation (degrees): 112
Grind Number: XM270H
It should make around 350-370hp and 400-420tq.