I have a new 540 EFI build for my little 24 SE in the works. Should be complete by the middle of April and estimated 620 to 630HP.

Question... is anyone running similar HP? If so what 4 blade prop are you running?

Previously been running the REV4 25 pitch with 530HP spinning roughly 5150 RPM. I know this prop will not cut it but I am looking for something very similar in handling.

Let me know....

Thanks.... and THINK SPRING!!

I'm running 605HP in a 22zx. Bravo1 28p spinning 5100. Decent getting on plane, and great top end.

The Bravo 1 28p was going to be my first guess or attempt.

Anyone ever try a Turbo TXP OT4?

TMONE did alot of prop testing before I purchased the boat. The engine is pushing approx 580hp at 5800rpm
Mercury Revolution 4 25P 77mph GPS
Hydromotive P5X 25P 80 mph GPS
He also gave me a Mercury Mirage Plus (3) 27P but said the other two gave more bow lift which you know the 24 likes.
I think TOFFEN has done the most prop testing.

When I had my 24 w/ 600 + HP, I tried quite a few different props. I did not like the stock Bravos at all. Too much blade area/diameter which manhandled the boat due to narrow beam. Tried a cut down version that was better, but still not great. There are quite a few more prop options now as opposed to when I had mine 15 years ago, but I ran a 29 Mirage+ for top speed, and a Hydromotive QIV for all around. The Hydro took care of porpoise and trim sensitivity. It took a little getting used as opposed to others because you had to run a little more positive trim to carry the bow, but my particular set-up required VERY little positive trim to start with, so a little extra was not a problem. Made the boat more manageable, because with big HP and more so torque, they are a DRIVERS boat.

Scarabman, I do believe I have your old boat. You ran roughly 93 with that 29 Mirage+ correct? I have never tried the Hydromotive QIV, I think the previous owner (onesickpantera) may have. What pitch did you run with? You had roughly 625 in this same boat correct?

Hammerdome, I guess you do. I did not realize Scott had sold. I was curious when I saw the Innovation 500 in 99 24 under your profile.

Yes, I ran an approx 625 HP Procharged set-up. I dont remember exact numbers anymore and the dyno sheets are long gone. I ran it up to 93 and change a couple times with a the 29 M+. I was always confident, right or wrong, that the combo had more in it, with some set-up tweaking but I had spent a FORTUNE on that boat and just couldnt justify spending anymore knowing that whatever I got it to run, I would have been able to do so, so rarely moving forward that it didnt make sense. I believe Scott did try the Hydro based on conversations I had with him and he didnt like it as I recall. Part of the difference may have been salt to fresh running characteristics. I also dont know what pitch he may have run, but the QIV I had was actually underpitched for top end. I want to say it was 24 or 5 but it was a long time ago. The higher pitch you go, the more the boat wants to lean to port, especially under high torque/heavy acceleration

The prop I always wanted to try, after talking quite a bit with some set-up experts, was a Mach Sterndriver. I was never able to lay my hands on one for testing though

I have been wanting to try a left hand prop to see if that would take care of the port lean. I have read that others have had success going that route. You tend to find props much cheaper left hand screw anyway.

Scott recomends the Turbo TXP OT4 or the Hydromotive Quad IV-X so i think i will narrow it down to those two. Thanks for your input, I still cant imagine 93 in that little boat. We will see what we can do with this new engine, but I would be happy with 83!

Hammerdome, just curious, is your boat the old Kami Kazi raceboat?

It was an absolute BLAST to drive. It was the most fun in some good 1 to 2' chop as a "head sea" when you could get on top and just go. Some of the most fun I have ever had boating.

I had tried a left hand prop at one point, and it helped to an extent. Either way, with big torque, when you lean on the throttle quickly, the props resistance makes the narrow boat roll to the side. I was truthfully more comfortable with a port lean and went back to a right hand prop. I had found that when it did lean, you could counteract it with a quick jerk of the wheel just a touch to get it balanced back on the pad. Its a good boat, there may just be a little learning curve, depending on what you used to.