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NEW BBC HP?

Posted: Fri Jan 29, 2016 8:20 pm
by STINGER477
My father-in-law put a new BBC with an OX-Drive 2.55-1 turning a 80" 4-blade "R" at the 3.5mark and he's turning 5300rpm WOT, any guess as how much HP. he's putting out?

Re: NEW BBC HP?

Posted: Fri Jan 29, 2016 8:30 pm
by GCRedfisher
There are 14 different "BBC's" that have been produced over the years ( not counting the aftermarket)
Have no idea which one he has so to just guess.....I'll say 2000hp at least! :D

Seriously though, which engine does he have, how's it built? Without more info, it would be guess work.

Re: NEW BBC HP?

Posted: Fri Jan 29, 2016 8:41 pm
by Chaseh
I'm gonna say around 600. Buddy has dynod 600hp bbc 496 with a 2.68 box and 4 blade 84" superwides turning the 2 mark or better

Re: NEW BBC HP?

Posted: Fri Jan 29, 2016 8:45 pm
by STINGER477
Don't know the builder, but it was built to go in a "Tractor Pulling Truck" but they never ran it, and the guy needed some money and now its on an airboat, and we are trying to guess by the RPM and gear ratio and pitch what its making.

Re: NEW BBC HP?

Posted: Wed Feb 03, 2016 3:35 pm
by RJC5778
can you post the displacement on this motor? bore, stroke, cam specs, carb, all that jazz, must be a torque monster to spin a prop like that or the cage gap is small causing the prop to cavitate, I have a dyno tested 593hp airboat bbc 498 ci with a 2:1 belt drive spinning a 3 blade ngr 80" dia right at the 2 mark or a little under, motor holds 590+ torque from 3500 up