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
[email protected]
www.roccardmarineengines.com
570-956-2840

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!!

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

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.


Nordic95

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.

Re: hp 500 rebuild to hp 620
 

14 HP on an intake,thats alot. -1 MPH for him.What boat are they going into?


Nordic95

Re: hp 500 rebuild to hp 620
 

35 sonic