TBI to TPI help requested....please
Thread Starter
Junior Member
Joined: Mar 2001
Posts: 51
Likes: 0
From: Chicago, Il
Car: 1991 Camaro Convertible
Engine: GMPP 350
Transmission: T-56
TBI to TPI help requested....please
I just finished ripping my engine bay all the way down to paint it and I laid my old TBI harness on the ground.... I have an 87 TPI system with a factory wiring harness (My camaro originally is a 91 TBI 305). I can tell just by looking at the harnesses that I need to combine to get a complete TPI harness. What I really need right now is to be pointed towards some web sites or books that will give me a good wiring diagram.... my Haynes manual is not getting it done.
Joined: Jan 2003
Posts: 255
Likes: 1
From: indiana
Car: 91 Z-28
Engine: 420 sbc
Transmission: T56
Axle/Gears: 12 bolt/4.10 gears
get a shop manual from helm. it has complete wire harness breakdowns for the whole car. Also i would seriously consider changing the tuned port to a speed density setup. it will be a hell of a lot easier to swap into a 91 than a mass air system.
Junior Member
Joined: Aug 2003
Posts: 9
Likes: 0
From: Plainfield Illinois
Car: 91 RS Camaro
Engine: 335 Stroker
Transmission: TH700R4
91 TBI to 87 TPI
Hey, i did this exact swap. The book that helped me the most was a book by Choco Munday. Its called "TUNED PORT INJECTION" it has every diagram you need. Its only good for 87 to 89 tuned ports. I also made my own diagram to join the 2 harnesses. If you have any questions, don't hesitate to ask. an 87 or 88 GM camaro manual also came in very handy for me.
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