I have a pair of mildly built 502's fresh from the machine shop.

Bill Jones did the heads and intake porting, running a Bob M Cam with a crower roller rocker set up with rock stud girdles. MLS head gaskets with a full treatment of ARP fastners.

I am running a full Young Performance Marine fuel system, modified fuel rails, A1000 pumps, 1 to 1 boost reference regulators, etc.

Anyone have any tips on programming the ECM? I have a tuner that will tune these utilizing MEFI Burn and wideband O2's. Whats a good starting point?

Swap over to Holley HP ....self tuning ...

Self tuning under boost?

I am going to stick with the mefi. Lots of work done to the intake manifold.

Are you doing it on a Dyno? If not I had good luck sending the specs to AZ Speed and Marine and they flashed it. The Dyno was the way to go for sure. Tyler Crockett in Ruby MI was fantastic,

Yes Continuously adjust ...... Stock mpi manifolds with Articfriends Guidance on manifolds ....840hp ...m



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I had 2 mefi's (performance marine?) we ran with stock motor and M4's ....ran great ....I sold em to someone on here that only needed one ....cant remember ...maybe they will see this thread ....m

Send a pm to Smitty ( articfriends ) on here, he's done a lot of mefi tunning

Why not call Eddie Young??

That would be ideal. I need to find one in Utah.