454 mpi up grades...
#11
Registered
I took one and dropped hp 500 cam in it and remaped the ecu and put dry exhaust on it gave it a little more pep
#12
Registered
They do if it's a "mag". Mike Sommers had 1995 gen v 502 mag MPI engines. He had them redone and installed stroker kits to make them 540's. His original GM forged rotating assemblies were removed. When I asked him if he wanted to sell me them, he said too late because he threw them in the scrap bin.
#14
Registered
Platinum Member
The Merc. MPI setups make good midrange torque but run out of breath just past 5000 rpm. The most power I have seen out of one NA is 565hp. If you are looking to go EFI they are ok but there are definitely better ways to go about it