That was with the old engine build. Then it was 77.something at 5000 with a Billet B impeller(like an A-). When I added the vacuum pump and mufflers it turned 5400 but I didn't get a speed run. I don't thing the mufflers had anything to do with it but two sets off muffler sure didnt hurt this thing. I don't think the vacuum pump made all that power it just freed it up. The old motor had crank case psi problems that i've taken steps to correct in the new build, plus about 50 to 75 extra horses. Funny thing is that engine never turned passed 5000 when it was in my Mustang either , must have been the psi.
I've gotta get it buttoned back us soon its got a new stainless B cut Turbine impeller that i'm gonna run back to back with a B cut Hi-helix, so it ought to be interesting.
I guess I'm going in the right direction then. When I bought the boat (July 07) I was a BIG boy, 315lbs. I've lost 55lbs. Hoping, by the time summer rolls around, I'll have lost the majority of next 70lbs. That being said, 3mph IS 3mph. I'll take it anyway I can. Then the 408 stroker on top of that would be plenty.
Congratulations, that is awesome!
Seriously, good job!