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thedonz

06-17-2004 05:43 PM

502 EFI/MPI question

is the Mercury 502 EFI/MPI a good base engine to build up on a mid nineties Top Gun? what needs to be modified to make it durable if blower is added?

thanks

Chase910

06-18-2004 12:36 PM

Re: 502 EFI/MPI question

Yes. Some recommend swapping out the stock head gaskets with blower installs...my experience with the Whipple units is the stock parts work fine.

Breathe Later

06-18-2004 01:19 PM

Re: 502 EFI/MPI question

Go with Fel Pro 17048 head gaskets. The exhaust valves should be inconel-Manleys or Ferrea. I sent my heads to Teague for the valve job, springs, etc. Make sure the crappy Mercruiser cast exhausts and elbows aren't leaking. Otherwise, stock exhaust will be fine.
Also, on a Top Gun, you're going to have to upgrade the Bravo's. Imco Extreme, Max Machine Worx, Teague XR are all good options.

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