454 mpi up grades...
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Bought a new boat in September . It is a 1994 35 lighting with 454 mag mpi's 385hp bone stock.. I bought new exhaust for it and want to up grade the cam and the ecm.. Any suggestions. Right now it has a flat tappet wanted to go roller thinking of the 731 grind. The exhaust is the emi thunder with dry tails. Thanks Robert.
Last edited by excalibur82; 12-03-2013 at 07:05 AM.
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1994 Gen V Mags would have been carb motors would they not? If you have a Gen V EFI (Lingenfelter intake) then it is a 330 HP non-Mag motor. Looks just like the later 385 HP MPI Mag motors.
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They made a GEN V 454 and 502 MAG EFI. They were flat tappet. Stock cam was GM#14096209. 220/220 .500/.500 115lsa. Upgrading to a better hyd roller would be a step in the right direction.
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I take that back. You'd be better off pulling them out and selling them. Try and find a set of 502/415HP mags with around 500 hours to drop in. Its not worth doing modifications and will significantly reduce resale value.
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im curious,does the 1994 gen5 engine have forged crankshaft&pistons?
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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.
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