expected mph gains?

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02-13-2004 | 08:22 AM

26sonic

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From: poughkeepsie, ny, usa

expected mph gains?

3 identical boats one with 500efi( 470pshp) runs 72-73 mph gps ,one with 525sc(490pshp) runs 75 mph gps what would the same boat run with 575 efi (550pshp) ?

02-13-2004 | 09:04 AM

ursus

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I get 79 using old rule of thumb

SQRT (new hp)
----------------------- x Old speed = New speed
SQRT (old Hp)

02-14-2004 | 01:29 PM

26sonic

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From: poughkeepsie, ny, usa

ttt

02-14-2004 | 04:22 PM

zt260

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From: Hudson River, NY

80MPH no more....

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01-20-2004 08:48 PM

MPH is lower than expected...

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