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1.5 or 1.35 gear ratio?

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Old 01-08-2008 | 06:54 PM
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Default 1.5 or 1.35 gear ratio?

Boat:33', 7200 pounds, Std. "V" no steps. 24* deadrise.
Motors, twin 525's.
Bravo. XR.
Gear ratio???/

Since I have a choice, what's the better gear ratio? and why?

Thx

P
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Old 01-08-2008 | 07:29 PM
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The 135 stronger and can spin a smaller prop. I had them in an AT, a 32, and I never had a problem. I heard they were stronger and I could have gone down to a 21 but ran a 23. My understanding is that it was a better drive set up.
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Old 01-08-2008 | 08:53 PM
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1.50 It will have better acceleration. More reduction may be even better.
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Old 01-09-2008 | 12:18 AM
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You will probably be in the range of a 30-32 pitch Bravo prop with a 1.5 ratio. You don't want to go higher than 32 with bravo props.

I would go with 1.35's and run something in the 28 pitch range. You will still have plenty of acceleration with your power. I have 1.36's/24" props behind 502mpi's and have no issues. The boat accelerates fine. Never had 1.50's on it to make a comparison though.
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Old 01-09-2008 | 09:07 PM
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PARADOX please pm me
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Old 01-09-2008 | 09:29 PM
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I'm sorry; am I missing something?? the Avanti hull is very much like a cigarette hull? No?
Would the 28' Apache hull be much different let alone the 30' Bullet? If so how can you swing a 32 pitch Bravo with 525's??

I am in the middle of this very same question 1.35 or 1.50 ratio and have run the numbers on M Bam caculators backwards and forwards and don't see how anything other than a 1.5 will work.

Please someone show me what I'm missing
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Old 01-09-2008 | 09:58 PM
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I doubt I can run a 30"- 32" prop with 525's and 33' "V" hull to, but as far as the ratio, I am not certain which wat would be better. I guess I rather have speed and acceleration. The boat panes pretty good.

llwleo.. I can't PM you. I don't think you have that option. E-mail me at [email protected]
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Old 01-09-2008 | 10:35 PM
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Go with the 1.50...alot cheaper

Last edited by Back4More; 01-09-2008 at 10:43 PM.
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Old 01-09-2008 | 10:40 PM
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Its only 7200 lbs. 32 AT's run 28's or labbed 30's with 500's and weigh about the same.
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Old 01-09-2008 | 10:57 PM
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I agree.
With 28-30's it will run at about 80mph.
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