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Prop Slip on a 36

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Old 06-26-2015, 12:48 PM
  #11  
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Originally Posted by Leathl_WS6
Can you tell me where you are? Speed pitch horsepower!!

I know these boats are heavy and not so efficient, but even 18% seems high.

Wonder if that's the norm??

Anyone else?
My best numbers are: 88 MPH on GPS @ 5300 RPM. Mercury Racing 575 SCi's, with labbed 32" 4 blade Bravos. I have a slightly ligher 36' with a single step. In my opinion, I don't think you will get a 36' Apache to have slip numbers lower than 16 or 17%.
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Old 07-20-2015, 09:08 PM
  #12  
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I'm running 12% slip. 1.30 ratio, 26" Bravo1, 5700-5800rpm, 92.3 mph on gps.

For a bravo 1 subtract 1" of pitch when you factor your numbers.
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Old 07-21-2015, 07:15 AM
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Originally Posted by Panther
I'm running 12% slip. 1.30 ratio, 26" Bravo1, 5700-5800rpm, 92.3 mph on gps.

For a bravo 1 subtract 1" of pitch when you factor your numbers.
Interesting, why do you drop 1 on pitch for a Bravo one prop? I could live with those slip numbers... What kind of power are you making? And is yours a full cabin?
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Old 07-28-2015, 02:40 PM
  #14  
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You drop an inch because a B1 prop is variable pitch. It's not a true pitch prop like a Hydromotive QIV. Bobby will tell you that you should see similar slip numbers as mine with the flat bottom models. My boat would also be faster if I had XR's but you loose 2-3mph with the BMax. The step bottom models will have higher slip but better top end. Also, you can't gauge your slip by your mid-range, you have to run WOT.

When I ran the 92.3mph I had 875hp engines. Now the engines are 964hp and I haven't had good enough conditions to really see what she can do wit the new power. I'm expecting mid 90's.

For those of us who use our Apache's, see below;
https://youtu.be/lEqFPYBB6Vw

Last edited by Panther; 07-28-2015 at 02:44 PM.
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Old 07-28-2015, 07:20 PM
  #15  
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For those of us who use our Apache's, see below;
https://youtu.be/lEqFPYBB6Vw [/QUOTE]

I guess I can't watch the video
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Old 07-30-2015, 12:59 AM
  #16  
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I shed a tear every time I drive by Norms shop!
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