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24 x 7 boat with 500hp

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Old 09-06-2015 | 08:19 PM
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Default 24 x 7 boat with 500hp

I have a 24 jaws with 500hp exactly. The prop i have is a 24p 4 blade.

Am i under prop'd?

What speeds should i see?
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Old 09-07-2015 | 03:22 AM
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no
75 maybe
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Old 09-07-2015 | 07:56 AM
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What gear ratio in the drive? What is your RPM's at WOT?
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Old 09-08-2015 | 08:34 AM
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Id guess 70 mph with a 4 blade
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Old 09-08-2015 | 02:34 PM
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What does the complete package weigh with people fuel and gear?

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Old 09-10-2015 | 01:09 PM
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The 24 Superboat I used to own ran 76-78 w/425 HP. I ran a 28P Bravo up to 5000 RPM, 1.5R.
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Old 09-11-2015 | 12:02 PM
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So your Superboat had 10-11% slip.
This is why I asked for the numbers.
RPM X Ratio X Pitch X .0009496 = theoretical speed.
Theoretical - Actual = Slip.
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Old 09-11-2015 | 12:09 PM
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5000 x .666 (1 divided by 1.5) = 3330. 3330 x 28 = 93240. 93240 x .0009496 = 88.54
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Old 09-14-2015 | 01:29 AM
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I think a 24" is going to be to small if its a 1.5 ratio drive. Most likely will need a 26 or 28.
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Old 09-14-2015 | 10:23 PM
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Its a stock bravo. Have not tested the boat yet going to start with a 24p and see what it likes. I know the super boat is lighter than the jaws, ill be happy with 75mph i think if i blue print the hull it'll be close to 80
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