I'm running 650 hp in my 28 and I run a B1-28,great cruising rpm.Might be a little faster on the top with a smaller prop(more rpm)but 80(gps) is fast enough with a hull designed for 70 - 73 mph.It deffinately gets my attention after 75mph.

I am running b1 28 4 blade 496 with 3.5 boost procharger. Prop seems to break loose when just about on plane. I have to back off throttle then ease back in. Is this normal? My prop is beat up and needs some attention. Had it at 74 on gps without really staying in it long. I think about 4800 rpm. What kind of crusing speed should i see at 3500 rpm?

the prop blowing out getting on plane is normal, typically you cant have both, you either have a speed prop or a holeshot prop, mine is a labbed 26P and I have blowout.

looks like i'm at a B1 30P -- turning right at 5050 rpms i'm getting 81 on GPS.

That is very impressive speed. How many lbs of boost are you running. Is it a stock 502? I am bouncing around 73 on gps at 4900 rpm. Starting to think I am really missing out on something.

its a 5psi pulley -- however my boost gauge is only indicating 4psi - so not sure where i'm loosing that 1lb at (could be how I have the gauge plumbed)

yes -- its a completely stock 502 with the exception of the upgraded fuel system that is part of the procharger setup.

Did you use that kit with the bigger fuel injectors? By any chance did you pay attention to the speed around 3500 rpm? I am driving myself nuts trying to get cruising speed around 48-50 mph and keep it under 4000 rpm.

as long as i run the 5psi pulley you can run the stock injectors. the 7psi pulley requires the injector upgrade.

at 4000 rpm i'm running right at 60-62 on the speedo - i did not test that speed with GPS -- so probably more like 56-58 gps speed.

hope that helps!

great numbers, does it get squirelly?

do you have the stock insta-tabs? I replaced my 12" plates with 16" plates, I bought them from instatab for $350 and reused all the rams, fit the same holes in the transom, seems to help with chine walking

I have kplanes

if you aren't careful it gets squirelly at 80'ish - but as long as you are driving it -- i've not had any problems.