Mpfi v6 to tpi 350
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Joined: Jan 2009
Posts: 105
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From: Lansing NC 28643
Car: 91 Firebird, 89 Bird, 86 Bird
Engine: None, 5.7, 5.0 L.O.
Transmission: None, T5, Thm 350
Axle/Gears: 3.23, 02' 3.43 rear disc, ???
Mpfi v6 to tpi 350
I know I seen a thread on here before but after searching for a while I couldn't find it again. I need info on what wiring harness changes I need to make to switch from an 89 maf v6 to an 87 maf tpi. I don't know if it makes any difference but the tpi motor is an aluminum headed corvette motor.
Thread Starter
Member
Joined: Jan 2009
Posts: 105
Likes: 0
From: Lansing NC 28643
Car: 91 Firebird, 89 Bird, 86 Bird
Engine: None, 5.7, 5.0 L.O.
Transmission: None, T5, Thm 350
Axle/Gears: 3.23, 02' 3.43 rear disc, ???
Re: Mpfi v6 to tpi 350
Thinking I should have posted this into electronics instead of motor swap... Still having trouble finding what I need to change. I'm very new to efi but what I have found is
1. I need to splice an additional injector on each side
2. Might need to extend wires for tps, maf, etc
Is that all harness wise that would need changed?
What do I need to do computer wise?
1. I need to splice an additional injector on each side
2. Might need to extend wires for tps, maf, etc
Is that all harness wise that would need changed?
What do I need to do computer wise?
Joined: Nov 2008
Posts: 2,097
Likes: 177
From: Milwaukee
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
I'd suggest finding an 89 tpi harness on the classified boards. Way easier. Use then a 89 '165 ecm and prom
Thread Starter
Member
Joined: Jan 2009
Posts: 105
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From: Lansing NC 28643
Car: 91 Firebird, 89 Bird, 86 Bird
Engine: None, 5.7, 5.0 L.O.
Transmission: None, T5, Thm 350
Axle/Gears: 3.23, 02' 3.43 rear disc, ???
Re: Mpfi v6 to tpi 350
I figured it would but I don't mind if its difficult. I can spend time on it but according to the wife I can't spend much more money on it.
Thread Starter
Member
Joined: Jan 2009
Posts: 105
Likes: 0
From: Lansing NC 28643
Car: 91 Firebird, 89 Bird, 86 Bird
Engine: None, 5.7, 5.0 L.O.
Transmission: None, T5, Thm 350
Axle/Gears: 3.23, 02' 3.43 rear disc, ???
Re: Mpfi v6 to tpi 350
So I guess those are the only harness alterations needed?
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