we put 725 blower moturs in it tried it out 70 at 4000 82 at 5000 only ran it at three quarter throttle with the 28 s it had with 570 s . any suggestions on props thanks

We never had 28's when we had it. We had a set of worked 30 Bravo's and a set of worked 30 or 32 Hydromotive Quad 4's. I believe we spun them up to 5400-5600 rpm. The Hydromotive props were faster by a few MPH. What direction are you turning the props? It is faster turning them in.

some of this stuff is over my head but not my PARTNER dan who owns inland marine .he installed motors himself along with everything else needed for blower motors..ect ect..these motors fit perfect in boat and run great. im sure he gets all of it and knows which way props turn.your imput will help us. we will keep you posted. thanks .....

So I'm clear, what are Factory 2 specs? Drives on the transom?

thanks

the boat has another set of props they are hydromotives stamped 29 could these be the ones you had worked.

Check out this site for Factory 1-3
http://www.p4-34.com/public_html/FactoryClasses.htm

Basics for F2 were Factory spec'd 30-39' with twin HP500's/Bravo

30 Sutphen held kilo record for 2 years
 

The 30 foot SUTPHEN held the kilo record the first few years, until Reggie had his own engine builder with a seal kit.

With two 725 HP blower motors, boxes, with a 1:50 drive, you should be in the 32 to 34 prop range.

thanks we re thinking lab finished 32 . but first this week tue or wed we will try hydromotives we got with boat. and we will see you at fall river poker run.