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hp 500 rebuild to hp 620

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Old 03-30-2006, 11:09 PM
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Default hp 500 rebuild to hp 620
Here is a rebuild we recently completed on a pair of hp 500's for a customer.They ended up with 619.9 HP@5700 and 620.2 lbs tq@4700. He sould see some nice gains from this upgrade.

Mike



Roccard Marine Engines
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www.roccardmarineengines.com
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Old 03-31-2006, 08:49 AM
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Default Re: hp 500 rebuild to hp 620
mike11,

Looks good and has good numbers. You could eliminate a lot of suspense if you included parts list / build sheet!!
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Old 03-31-2006, 05:51 PM
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Default Re: hp 500 rebuild to hp 620
The TQ and HP the same? Most of the 500's I have seen had more TQ than HP
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Old 03-31-2006, 08:55 PM
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Default Re: hp 500 rebuild to hp 620
Nice valve covers.Hey Mike did you use the same heads and cam as mine?Carb?intake?or is that the stock HP500 intake.


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Old 03-31-2006, 09:07 PM
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Default Re: hp 500 rebuild to hp 620
Thats a Merlin intake which caused us to lose some HP compared to yours Anthony, but the rest of the conversion is the same.
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Old 03-31-2006, 09:13 PM
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Default Re: hp 500 rebuild to hp 620
14 HP on an intake,thats alot. -1 MPH for him.What boat are they going into?


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Old 03-31-2006, 11:15 PM
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Default Re: hp 500 rebuild to hp 620
35 sonic
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