For All You Prop Gurue's

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04-24-2005 | 01:44 PM

#11

XLISIV

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Joined: Apr 2005

Posts: 4

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From: Miami,Philly

Re: For All You Prop Gurue's

why cant I get a 25p to go over 3200rpm?? But a 23p will go to 5500rpm.
95 Sonic 31ss with a single sc1000 w/ black hawk drive.
Thanks

04-25-2005 | 06:48 AM

#12

throttleup

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Joined: Mar 2002

Posts: 5,143

Likes: 1

From: Cajun Country

Re: For All You Prop Gurue's

XLISIV,
There are several reason why you have such a difference in rpm between the two sets of props. What is your speed and RPM at wide open throttle with both sets of props? What is the gear ratio of the drive? Do you have dyno sheets for your engine?

Matt

04-25-2005 | 08:47 AM

#13

XLISIV

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Joined: Apr 2005

Posts: 4

Likes: 0

From: Miami,Philly

Re: For All You Prop Gurue's

ratio is 1:1.35 on the drive. and 23p is 57mph@5500 and the 25p is [email protected]r is a Mercruiser SC 1000 i think its 1000hp 2x4 supercharger.
THanks
oh this is only 1 motor its a custom Sonic 31ss