TPI swap
06-24-2012, 12:52 PM
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Car: 89 Iroc
Engine: 5.7 Tpi
Transmission: WC T5
Axle/Gears: 9 bolt/stock
TPI swap
I'm swapping my TBI to a TPI system that I picked up and I have a question.....I did research on it but, I still am not positive. I was going to convert my TBI harness to run the TPI for MAP/SD but....I only have the 91 stock TBI ecm and a 87 TPI ecm....can I use either of those to run that harness converted to MAP/SD TPI? Anyone's help would be AWESOME! 
06-24-2012, 02:45 PM
#2
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Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
Re: TPI swap
This was in the stickys. It shows you how to repin and rewire the TBI harness for TPI.
https://www.thirdgen.org/forums/tpi/...d-density.html
https://www.thirdgen.org/forums/tpi/...d-density.html
06-24-2012, 03:10 PM
#3
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Car: 89 Iroc
Engine: 5.7 Tpi
Transmission: WC T5
Axle/Gears: 9 bolt/stock
Re: TPI swap
I already wired everything else up but the ECM and all I need to know is if I HAVE to use the 7730 ECM or if I can get away with using the 7165 ECM or if there is some way to use the 91 TBI ecm.
06-25-2012, 11:58 PM
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Car: 89 Iroc
Engine: 5.7 Tpi
Transmission: WC T5
Axle/Gears: 9 bolt/stock
Re: TPI swap
I have the 165 ecm.....burn off and Maf relays. The ecm and relays were out of a 87 iroc. I also have the 87's harness....so me and me friend were going to repin and add the connections for the Maf off of the 87 harness. Pretty much building a harness lol.
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