311 prop help..
 

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?

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

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..

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

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.

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.

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

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

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

Cams intakes and carbs

Do you remember your cruise speed and rpm!

With 330s you should be looking for 40-45mph cruise at about 3500 rpms. Expect low 60s for top end if you have Bravo drives

Been a while since I upgraded, but that sounds about right. Cruise speed and planning were the best benefits with the hydros

Hey tried to send you a pm but your box is full...

Sorry, PM box is cleaned out now

Formula, I have a 1990 311. Came with 330's and 22p bravo's. Went low 60's. Upgraded to 502 MPI's and threw on a pair of used 24p bravos's. The thing porpoises like a banshee and I only get about 66. I've been told to go with the Hydromotives for more stern lift and that my 24p Bravo's could be bad. Thoughts?

Have you tried a 25 Mirage?

I've had two 311s and if you are turning your props out like it came from the factory, I found that 4 blades picked the back end up a little to much and made them bow steer. Your X dimension is low enough that you shouldn't need a 4 blade. Both of mine came with 23s and I changed them to Lab 25s. Sorry it's been a long time time, but if I remember right my 1988 with 330s ran 66 at 4800 rpm. They both had 1.5 Bravos. If you want to run 4 blades, you might want to try turning them in.

Find some 25 mirage non plusses

Have you tried both? On my hull which is pretty similar the Plusses were MUCH better than the standard Mirage, not as good as the Rev4's though.
Standard Mirage for me blew out very easily getting on plane and cruise speed sucked

Kevlar382 is correct on the RPM's and speed as I owned his old 88 311. Another friend of mine with same boat ran 24p hydromotives 4blades. Slower top end speeds but better cruising speed. I still have the 25's Mirage non plus and thinking about selling them as I sold the boat. Keep them as a spares after I re-powered the boat.

Dave, where did the boat end up. I like to keep track of my old ones. If you ever talk to him please give him my number so I can help him out if he has any questions. Did you get a 382? Hope you have a Happy New Year..

It ran 66 on gps?? That's damn good for 330s...

So anyone else have input on 4 blade hydromotives?