PROP ADVICE

[firecatgreen]

Thinking about trying some different props I'm running a bravo 1 4 blade 15"x26p out today 60mph on gps 4200rpm with about 1 1/2 to 2 lbs of boost, any advice on what to try

[hotbeek]

You need to turn more rpms. Are you sure tach is accurate ? I'd recommend going with a three blade and smaller diameter from your four blade. Try a 23 Mirage Plus or a 22 Bravo1 if you'd like to stay with the four blade.By dropping diameter and pitch you should be able to pick up 600-700 rpms. You should try to turn atleast 5000 rpms. Was your engine dyno'd ? If so, where was your peak hp(at what rpms) Most big blocks can safely turn 5000-5200. Not all day but easily for short blasts. I used to run a 454 bored .030 over with a b&m 250 blower at 6lbs of boost. I ran my rpms up to 5150rpms swinging a Mirage Plus 25. That was 68mph GPS on a 28' Baja.

Keep us posted on results !

[firecatgreen]

I was just running up the river at crusing speed will run up to 5200 rpms easy ran around 80 last year thinking about going to some type of 28p to lower rpms at crusing speed boost dosn't start t'ii about 3900-4000rpm

[hotbeek]

I thought you were running 4200 a WOT. If you want to lower cruising speed I'd stay with a four blade prop. If you're running that 26 up to 5200 I think you'd be safe running a 28 four blade. If money is not much of an object they have some new five blade props that are really supposed to be THE all around prop.

Good Luck !