New Hope for TBI trucks
Does your 350-powered '87-'95 Chevy/GMC SUV or pickup need a shot in the arm? Are those pesky new Vortecs and Gen IIIs embarrassing your once-mighty 5.7L TBI powerplant? Edelbrock has the fix in the form of the Performer Multipoint EFI system (PN 3502 for '87-'92 model years, PN 3501 for '93-'95 model years). Also available for 454 applications, Edelbrock's nifty kit is a simple bolt-on swap that'll unleash plenty of newfound power and even a dab of fuel economy -- if you can manage to keep your foot out of it.
We took a trip to the Edelbrock R&D lab to examine the finer points of the small-block Performer Multipoint EFI system. After taking it all in and reviewing some dyno data, the Edelbrock Multipoint EFI System looks like an inexpensive way to add some new zest to the TBI-equipped, small-block Chevy engines.
Though the kit is complete, you'll need to upgrade the vehicle fuel system to supply the MPI system's 42-psi (at WOT, 35 psi in cruise mode) requirement. Stock pressure is 15 psi. All the hoses and fittings are included but not the pump, though Edelbrock offers pumps PN 3581 (in-tank mounted for single-tank vehicles) and PN 3590 (frame-mounted for dual-tank vehicles). These application-specific pumps are sold separately because including both in the kit would be cost prohibitive. Also, the stock computer chip must be replaced. Just fill out the enclosed chip information card and mail it to Edelbrock. The company will burn a chip to suit your needs and deliver it free of charge to your door via UPS Second Day air. The whole multipoint swap is an easy weekend job as long as you have the pump and chip details handled beforehand.
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1: Bone-stock '92 TBI 350 with exhaust manifolds, catalytic converter, and muffler
2: Edelbrock MPFI conversion (PN 3502), no other changes
3: Add Edelbrock TES headers (PN 6660), no other changes
4: Add emissions-legal Edelbrock Power Package: Performer Centerbolt heads (PN 6085), Performer Plus cam kit 0.398/0.442 lift, 244/264 advertised duration (PN 3702), TES Exhaust System (PN 6824)