more speed?

Old 06-13-2009, 04:05 PM
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I was just playing with the propeller calculator http://www.rbbi.com/folders/prop/propcalc.htm What type of outdrive do you have? A standard Bravo is 1.5 that would make your slip numbers like 20%. That seems very high, your tach may be off and you may not even be at 4300.
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Old 06-14-2009, 11:46 AM
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Originally Posted by fireboatpilot View Post
Hey Crapr6, why dont you trade him your 23 for his 26? Sounds like what you both need. Billy thats a very heavy boat but as they have said you are seriously over proped. Maybe a 21P 4 blade might do the trick. Is it a TRS or has it been switched to a Bravo1? Same prop splines so you know.
Oh boy did I mess up..I have a 21p on my boat now and what I meant to say was I will be needed a 23P prop. Sorry for the confustion.lol
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Old 06-14-2009, 01:01 PM
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Are you sure you have a stock 502 with 450 hp? I am not an expert but dosent sound right. I think a stock 502 mag is only 415 hp stock?

I agree that 26p prop sounds a little big. I am looking for a 25 or 26 p prop if you decide you want to sell it. I also have a 21p 4 blade Stainless I would let go cheap if that would help you?
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Old 06-14-2009, 01:37 PM
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He stated it was a crate motor so 450hp is correct. Although I thought a 502 was considered an 8.2L???

Scarab Billy are you trimming it up enough? Trim it until the bow gets light then keep trimming and watching the GPS. Trim it slowly until you start losing speed then trim back down to your max speed and note rpms.

Last edited by onesickpantera; 06-14-2009 at 01:39 PM.
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Old 06-17-2009, 05:23 PM
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Originally Posted by onesickpantera View Post
He stated it was a crate motor so 450hp is correct. Although I thought a 502 was considered an 8.2L???

Scarab Billy are you trimming it up enough? Trim it until the bow gets light then keep trimming and watching the GPS. Trim it slowly until you start losing speed then trim back down to your max speed and note rpms.
Thank you,..I will try it
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Old 06-17-2009, 05:29 PM
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Originally Posted by jeffswav View Post
I was just playing with the propeller calculator http://www.rbbi.com/folders/prop/propcalc.htm What type of outdrive do you have? A standard Bravo is 1.5 that would make your slip numbers like 20%. That seems very high, your tach may be off and you may not even be at 4300.
hmmmmm never even thought about the tach being low
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