TPI questions

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Sep 2, 2012 | 10:58 PM

90 camaro cj

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Joined: Nov 2010

Posts: 412

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From: Gilbert, AZ

Car: 1990 camaro RS

Engine: 305 TBI

Transmission: 700r4

Axle/Gears: 2.73

TPI questions

I bought a 91 z28 convertible that had no engine or tranny, it still has the wiring harness and CPU in it. I have for it a 55-86 2 pc RMS crate engine, I also got a Full TPI wiring harness and cpu from a 87 with a 85-86 TPI lower manifold, should i switch the whole system to the 87 MAF or should can i mod the old 85-86 TPI stuff to the speed density system, also which one is the better system?

Sep 3, 2012 | 07:53 AM

vetteoz

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From: Not in Kansas anymore

Car: 82 Z28

Engine: 383 SP EFI/ 4150 TB

Transmission: T400

Axle/Gears: QP 9" 3.73

Re: TPI questions

Quote:

Originally Posted by 90 camaro cj

91 z28 it still has the wiring harness and CPU in it.
I also got a Full TPI wiring harness and cpu from a 87 with a 85-86 TPI lower manifold,
should i switch the whole system to the 87 MAF or should can i mod the old 85-86 TPI stuff to the speed density system,

Intake /engine doesn't care what computer is running it so you can run MAF (85 -89) or SD (90- 92) ECM on any year TPI intake.
Seeing you already have the SD electronics in the car ,simpler and easiest to use that system.
Your early TPI plenum won't have a mount for the SD MAP sensor so you will have to remote mount that like on the TBI cars or get a SD TPI plenum that as the MAP mount