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Old 05-17-2010 | 08:46 AM
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Originally Posted by Chris c
I just purchased a 2002 donzi zr competition. It is rigged w/ side by side twin 875hp w/ bravo xr s w/ 2 inch shorties. Does anybody know what pitch prop i should start. 5 blade or six blade. Thank You
What props and gear ratio are you running now?

If you want some help post your WOT RPM and WOT MPH and we can run some numbers for you.

Julie
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Old 05-17-2010 | 07:27 PM
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Just getting the boat together. The motors are 875 hp 810 ft t at 6300 rpm. Trying to spin a prop around that rpm. Drive ratio is 1.5 Thank you, Chris
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Old 05-17-2010 | 09:52 PM
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Originally Posted by Club Drew
Whould you know price comparison of Arneson VRS#6's? thanks!
About 1/2..

The Arneson kit is complete and includes everything from the bell housing rearward. Lot less $, far less weight along with lower hp loss and of course more speed.
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Old 05-17-2010 | 09:54 PM
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Originally Posted by Chris c
Just getting the boat together. The motors are 875 hp 810 ft t at 6300 rpm. Trying to spin a prop around that rpm. Drive ratio is 1.5 Thank you, Chris
With that kind of power you should be seeing the teens rather easily.
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Old 05-24-2010 | 03:49 PM
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I would say around 112 MPH with a 32P 5B Semi-cleaver style propeller, like ours. I don't know if your drive is the correct height, for a 6B propeller.
I can tell you that the newer Donzi's run phenomenal with a 6B!

Julie
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