stlliberator

iTrader: (1)

Looking to try 4 blades. Boat is a 89 with 330s. Its got the stock 23 mirage 3 blades. So should I go too a 22 pitch bravo? Or should I go too a 24 pitch?

rexcramer1

Depends on what rpm you are getting with the 23s. Your current props probably have a lot of slip. That will decrease with four blades. 22s will keep about the same rpm at WOT, or maybe increase a few. 24's will drop rpms by about 200

stlliberator

iTrader: (1)

Well honestly I don't know what rpm I turn with the 23s...haven't had the boat in the water yet. The 23s are chewed up..so looking at new prop options. I've never had luck with 3 blades on any boat I've owned so I'm just going to go with 4 blades on this one too. I believe the mirages are stock props on a 311..

rexcramer1

Yeah my boat came with mirages and they suck. Running 23" Rev4's now and love them, but they run about the same as a 24 Bravo. I think your boat should run low 60s if its a Bravo boat. Go with 24's since 330s don't like a lot of rpms

Mr Maine

Let us know your results. I had a 272 with 330s, 64 to 65 with 25 mirage non plus at about 45-4600. I cruised at 50 though at about 35-3600 which was great.

Formula311-SR1

Hydromotive 22 or 24s depending on RPMs.
Our 89 worked great with the 24s. I had best luck with stock out of the box props.
Still have my backup 24s if you are interested.

stlliberator

iTrader: (1)

Did your boat have 330s in it? What mph you get? Spin in or out?
Price on props?

Formula311-SR1

Bought them from a 311 owner with stock 330s, he went 64
I had some work done on my 330s and would go 67.1 @ 5000 with stock 24s turning out.
For reference even used the same props with 502 mags later and went 72 @ 5300
I'll message you

stlliberator

iTrader: (1)

What work you have done to your your 330s...

Formula311-SR1

Cams intakes and carbs