Ok......we are going to have a little contest to see who can guess the horsepower that my (3) new Bob Madera spec'd boat motors make when they go on the dyno. Closest without going over will win something, just not sure what. Here are the details of what they are:

548 ci
AFR 325 aluminum heads, CNC ported, hand matched to intakes
Bob Madera/Marine Kinetics roller cams (specs proprietary)
Dart dominator intakes
ProSystems 1150 Dominator carburetors
Callies Compstar crankshafts
Diamond pistons
Scorpion roller rockers w/stud girdles
MSD billet distributors
MSD 6al boxes
Dry exhaust to the tips to prevent reversion due to the cam

91 octane pump gas

5800 rpm's

696 HP with 682 TQ at 4700 RPM's on a properly calibrated DTS dyno (if your going on a 901 it depends on the "wish" dial setting).

716 hp@6000 and 696tq@4600

750hp


edit

thats dual dominators?

I am in for 850

I read it again, single dominator carb on 3 motors LOL, so back to my original 750hp

What did you think of the Compstar crank? Their rods looked nice.

Compression ratio?

712 HP

My boat is a 91 non stepped 42 Fountain with triples. It ran low to mid 80's on the old hp500's with around 560 tired horsepower apiece at 5000-5100.

Callies Compstar stuff looks nice, the AFR heads are beautiful.

I will bet 9.6:1 with .030 gasket

Without knowing the cam specs and comp, the output could be anywhere on the map... but given the lack of info, I'm going to guess 682 hp.