Originally Posted by bajabob (Post 3113961)

i have a 1988 240sport with a 540dart 622hp n/a last sumer 136drive 23mirage prop at 5600 runnig low 80mph. it runs 80 all the time ! now this year i put more power going friday to test . i no a guy that does 98mph in a 24 outlaw . . the baja force hull is not the same hull . there is one thing when going over 60 mph you shuold have the rigth steering setup and long trim tab and a safety cut off switch hook to you . and drive that boat very carefull !!! :drink::drink:

Originally Posted by bajabob (Post 3113968)

i think if you run that 22 you will do 5200rpm at low 70mph . did you dyno your motor if so what is your rpm at the most hp ?? you need to no what rpm to prop your boat at .:drink::drink: i would try a 23mirage prop not a plus

Originally Posted by TELLefant (Post 3114988)

On dyno we had 610hp on 5100 RPM...

Originally Posted by TELLefant (Post 3123641)

Now it runs 65mph with 22 bravo 1 prop... with 5100 rpm.

Originally Posted by TELLefant (Post 3114988)

On dyno we had 610hp on 5100 RPM...

Originally Posted by TELLefant (Post 3113827)

I have a 572ci (through prop exhaust - because of restricted law...!) with a good 600hp in a Baja 235 Force (year 90) the prop is a 4-blades 26 with max. 4400RPM it run 64 mph last season. I know 4400 RPM is too low... So, I just have got a new 22 Merc Bravo1 4-blades prop. What should be the approx. result?

Originally Posted by MILD THUNDER (Post 4494069)

Thats a stout number for NA 454s at 5100rpm. You sure the dyno didnt have an overly optimistic correction factor ? My buddy had a 31 bullet with 600hp 509's, turned 26p bravo 1 props to 5400-5500