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-   -   Mph ???? (https://www.offshoreonly.com/forums/general-boating-discussion/284923-mph.html)

dave269 09-16-2012 08:46 PM

Mph ????
 
I have a 25' sxt warlock cat that I'll be installing a blown 565 w/ about 800hp. will it handle a 32p bravo one 4 blade & what should approx. mph??? around 58- 6200 rpm.

abones 09-16-2012 08:52 PM

what gear ratio are you running

mike tkach 09-16-2012 08:55 PM

assuming the drive is 1.5 ratio,800 hp should spin the 32p prop near 5500 in that lite cat,just my opinion.

abones 09-16-2012 09:02 PM


Originally Posted by mike tkach (Post 3778056)
assuming the drive is 1.5 ratio,800 hp should spin the 32p prop near 5500 in that lite cat,just my opinion.

agree +1

PokerRun388 09-16-2012 09:11 PM

That 25 is a good looking boat!

Any Pics?..:cool:

dave269 09-17-2012 09:06 PM

1.5 gear ratio

Turbojack 09-17-2012 09:49 PM

http://www.go-fast.com/Prop_Slip_Calculator.htm

114mph if it can pull 6200

That is unless your X is too low

abones 09-17-2012 10:20 PM


Originally Posted by Turbojack (Post 3778835)
http://www.go-fast.com/Prop_Slip_Calculator.htm

114mph if it can pull 6200

That is unless your X is too low

what slip % are you using? 10% is real good %

That would be sweet 114

teaguecustommarine 09-18-2012 06:18 PM


Originally Posted by dave269 (Post 3778048)
I have a 25' sxt warlock cat that I'll be installing a blown 565 w/ about 800hp. will it handle a 32p bravo one 4 blade & what should approx. mph??? around 58- 6200 rpm.

I hope you have a drive that can handle the power. Your boat being a single engine cat can be very rough on drives (aka the guy pushing the throttles forward). Be EASY getting the boat onto plane, put a little trim in it and try to be smooth with the throttle and it should last for a while.

If the prop does not work, do not force it to work... you could very easily break the drive or possibly hurt the engine.

New Prop, $550..
New Drive, $5500++

-Eric

dave269 09-18-2012 09:07 PM

Is 10% prop slip about average ? what other options besides the 32p bravo one 4 blade would be recc to lower the % ???


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