I have a 89 22 classic with a LS5 454 stroked should be pushing 575-610 hp thru a imco shortie not sure size has been repainted wondering what size prop I should start with ?
I have a 89 22 classic with a LS5 454 stroked should be pushing 575-610 hp thru a imco shortie not sure size has been repainted wondering what size prop I should start with ?
14-1/4 x 28" is what I use on a head modified 454 for an 18' Donzi, Alpha drive. Gives 5,600 RPM.
I am asking because I don't know. What is the gear ratio?
I have a TRS with 1.5 ratio. Supercharged 454 at approximately 535 hp. Will turn a Hydromotive worked down (not my me) from 28 to 26.5 to 5,400 at 76.5 GPS on a Donzi 22 (Criterion).
Same boat will turn a Rev4 25 to 5,700 at 75.5 GPS.
“Oh right, because you walked into strippers discount warehouse and said ‘Help me showcase my intellect.’” - Archer
Bill
Grand Rapids, Michigan
1985 Donzi Criterion SS
1967 Donzi 16 Ski Sporter, C16-409, Has a new home!
38' Carver Aft Cabin
1968 Sea Ray SRV 180 w/1975 70 hp Evinrude
10" RIB w/15 hp 1984 Evinrude
I'm not sure boat came with a over painted imco shortie drive
I'd think a 28 or 29 4 blade or 30/31 3 blade would be a good starting point if your drive is 1.5 ratio; which it probably is and you're not over-estimating the horsepower. The ratio will be stamped on the side of the upper, not on the shortie.
With about 550hp, standard length bravo, I ran a 27 4blade and 29 3 blade to about 5300. A shortie would require a bigger prop.
Why is faster never fast enough.
28p Bravo 1
Lake St. Clair, Lake Huron, Lake Erie, Lake Oakland
The Hydromotive QIVs hook up relatively well on drives near the surface. If you want to know what shortie you have, it will be stamped on the top of the front of the lower foot.
1971 Donzi 18' 2+3
1985 Eliminator 23' Daytona Offshore - Kevlar hull
1988 23' Donzi CC F-23 with 250HP EFI Mercury OB
1989 28' Team Warlock Offshore - single 548CID/600HP
1990 23' Warlock Offshore - single 525HP
Bill from Denison, TX - Lake Texoma
Anyone with a shorty ever try a Hydro P5X ?
I tried one on my 24' Super and I know a couple of guys that ran them on 24' Pantera and 24' Excal. They ran great on old school deep v with Hi propshaft...
Thank you, Patrick
1994 18' Classic 350Mag Alpha
Previously owned Donzis -
1996 22' Classic, 502Mag Bravo
1987 20' Minx, 350Mag Alpha
1975 18' Classic, 350Chevy Volvo 280
1971 Donzi 18' 2+3
1985 Eliminator 23' Daytona Offshore - Kevlar hull
1988 23' Donzi CC F-23 with 250HP EFI Mercury OB
1989 28' Team Warlock Offshore - single 548CID/600HP
1990 23' Warlock Offshore - single 525HP
Bill from Denison, TX - Lake Texoma
1971 Donzi 18' 2+3
1985 Eliminator 23' Daytona Offshore - Kevlar hull
1988 23' Donzi CC F-23 with 250HP EFI Mercury OB
1989 28' Team Warlock Offshore - single 548CID/600HP
1990 23' Warlock Offshore - single 525HP
Bill from Denison, TX - Lake Texoma
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