88GMCtruck
I'm all 8-Luggy!
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- Apr 14, 2010
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The vortec 454 motors are MPFI just as the 4.3, 5.0 and 5.7 smallblocks are. MPFI = Multi Port Fuel Injection, as in there are multiple places the fuel is injected. The difference between the 454 and the small blocks is the 454 uses regular injectors, and the small blocks use a spider injection system with 8 pop-it nozzles at the port or in the case of the upgraded spider assembly an injector at each port off the spider.Sorry if this sounds like a stupid question but how will the 454 harness work with a mpfi setup? I thought the 454 had 8 seprate injectors and plug ins as opposed to the single plug in for mpfi? Are you going to buy a new engine or just find the vortec upper half?
My engine is already a vortec - the block and heads are correct for what I need. It currently has an edelbrock dual plane and TBI on top of it, I'm going to remove that and put the vortec 454 manifold and injectors in its place.
Once done the truck is going to look like it's a OEM 98 454 truck under the hood.