Cant Get Over 92mph?? Whats Wrong
#1
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Cant Get Over 92mph?? Whats Wrong
I Have A 37 Single Step Stiletto, With 800hps, Speedmaster 5 With 1.34ratio, I Cant Get Over 92mph, I Was Running A 32x18 4-blade And Doing 58mph @ 2800rpm, And A Max Speed Of 92mph @ 5000rpm Due To The Rev Limiter, I Sent Out My Prop And Had Them Set To 34 Pitch And Now I Lost My Low End Speed Now At 3300rpm Im Doing 56mph And Still Same Top Speed Of 92mph, The Boat Did 105mph Before I Repowered It Over The Winter And Added 75hp Per Engine. Any Ideas????
#2
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Re: Cant Get Over 92mph?? Whats Wrong
Originally Posted by bernm3
I Have A 37 Single Step Stiletto, With 800hps, Speedmaster 5 With 1.34ratio, I Cant Get Over 92mph, I Was Running A 32x18 4-blade And Doing 58mph @ 2800rpm, And A Max Speed Of 92mph @ 5000rpm Due To The Rev Limiter, I Sent Out My Prop And Had Them Set To 34 Pitch And Now I Lost My Low End Speed Now At 3300rpm Im Doing 56mph And Still Same Top Speed Of 92mph, The Boat Did 105mph Before I Repowered It Over The Winter And Added 75hp Per Engine. Any Ideas????
#5
Charter Member # 545
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Re: Cant Get Over 92mph?? Whats Wrong
Its already been said, rev-limiters need to go up 5500-5800. I dont know much about your set up, but the 37 we had ran 6's with 1000's, and we were running 1.5 gears and swingin 16X34 pitch 4 blades. 18 inches of dia, just seems like alot of prop, unless your drives are mounted very high. I went up to 16.5's to lessen the slip in the mid-range, 18 seems like alot.
#6
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Re: Cant Get Over 92mph?? Whats Wrong
Originally Posted by bernm3
I Have A 37 Single Step Stiletto, With 800hps, Speedmaster 5 With 1.34ratio, I Cant Get Over 92mph, I Was Running A 32x18 4-blade And Doing 58mph @ 2800rpm, And A Max Speed Of 92mph @ 5000rpm Due To The Rev Limiter, I Sent Out My Prop And Had Them Set To 34 Pitch And Now I Lost My Low End Speed Now At 3300rpm Im Doing 56mph And Still Same Top Speed Of 92mph, The Boat Did 105mph Before I Repowered It Over The Winter And Added 75hp Per Engine. Any Ideas????
#7
Geronimo36
Gold Member
Re: Cant Get Over 92mph?? Whats Wrong
Originally Posted by bernm3
I Have A 37 Single Step Stiletto, With 800hps, Speedmaster 5 With 1.34ratio, I Cant Get Over 92mph, I Was Running A 32x18 4-blade And Doing 58mph @ 2800rpm, And A Max Speed Of 92mph @ 5000rpm Due To The Rev Limiter, I Sent Out My Prop And Had Them Set To 34 Pitch And Now I Lost My Low End Speed Now At 3300rpm Im Doing 56mph And Still Same Top Speed Of 92mph, The Boat Did 105mph Before I Repowered It Over The Winter And Added 75hp Per Engine. Any Ideas????
#9
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Re: Cant Get Over 92mph?? Whats Wrong
I would try some differnt props, almost certain whoever re-pitched them botched them up. Deffinately pull the chips out of the rev-limiters. Just keep an eye on it, but 5000 rmp seems a little bit too conservitive.