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scarab 22 motor upgrade

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Old 03-06-2010, 10:57 PM
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yak
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Default scarab 22 motor upgrade

A little help if you can. I have a Scarab 22 with a 454/330hp and am in the process of getting a new motor built. The shop is telling me I should have about 500hp when they are done. If my speed was 55mph with 330hp that would be 6 hp/mph. This would mean that I could expect 83mph out of 500hp. Is it that simple?
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Old 03-06-2010, 11:18 PM
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NOT REALLY,

You have hull efficienacy, and prop slip to deal with, its not a straigt line, I would be guessing high 70's, might touch 80 with some setup.
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Old 03-06-2010, 11:25 PM
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that'll do. thanks for the input
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Old 03-07-2010, 08:24 AM
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I have a scarab 22, that i have worked on and get 80 gps out if it , I live in williasmville call me 866-3468 . I have a shorty on it and had the bottom checked and have steering on it. I can tell what props will work or not ( the wilson boys know me )
It would be great to talk scott
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Old 03-07-2010, 08:37 AM
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Thanks Scott I will be in touch. The Wilson boys are the problem, I can't keep up!!!!!!
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Old 03-07-2010, 08:49 AM
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I here that, I say heblers new boat, There is a guy with a 29 fountain in west river that has 575 sc in it i ran nose to nose with him and he said his boat does 85 mph . kevin ,bubbie, kilroy . I can keep up on a good day scott ps go to youtube and look for scarab 22 running at speed in west river and you will see me at 78 mph under the gun

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Old 04-25-2010, 04:00 AM
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what gear ratio is your outdrive? i have a 97 with a bone stock motor running 1.50 ratio bravo one with a labbed 4 blade 24 pitch and i run 74 on gps.
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Old 04-25-2010, 11:14 AM
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What motor are you running, were you going down stream just need a little info. iam running 1.5 ratio, you need well over 500 hp to get that speed out off a 22 . if it is a stock 330 hp your rev limiter is set 4350 if it is a mag 4850 , hp 500 5350 . With a 24 labbed prop i think you would be on the rev limiter .
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Old 04-25-2010, 01:44 PM
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I have a 21 scarab.I know its a lot diff than the 22 but I am only seeing a touch over 70 with 530HP.

I think you will see 74-76 with the right setup.
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Old 04-25-2010, 03:59 PM
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There you go , that sounds about correct, what prop
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