'89 RS TBI to TPI conversion questions?
#1
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Car: 1982 Z-28
Engine: 5.0 w/ Holly carb
Transmission: TH-700R4
'89 RS TBI to TPI conversion questions?
I am beginning the process of converting a 1989 RS from TBI to TPI. The TPI components I have are only the hard parts, also from an '89. I want to convert the TBI harness over the TPI but do not have the pinout or wiring diagrams to consult.
From the many searches I have done, I know I will need to change the in-tank fuel pump, add relays etc. for the MAF burn off relay, create a wire harness to connect the MAF, injector harness connectors, and some other misc wire mods in the engine bay.
Will the stock '89 TBI ECM work for this conversion by replacing the TBI MEMCAL with one for TPI. I am sure there are some additional headaches I am not aware of.
I have searched and am unable to locate this info, any help would be appreciated.
Thanks, Andy
From the many searches I have done, I know I will need to change the in-tank fuel pump, add relays etc. for the MAF burn off relay, create a wire harness to connect the MAF, injector harness connectors, and some other misc wire mods in the engine bay.
Will the stock '89 TBI ECM work for this conversion by replacing the TBI MEMCAL with one for TPI. I am sure there are some additional headaches I am not aware of.
I have searched and am unable to locate this info, any help would be appreciated.
Thanks, Andy
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Car: 89 FORMULA FIREBIRD, 86 CHEVY CAMARO
Engine: L98, LB9 RESPECTIVLY
Transmission: 700 R4 (BOTH)
You cannot use the TBI ecm, you will need one for a TPI car(1227165). The chips are not interchangeable.
You will also need a new throttle cable, and a new kickdown cable. The TBI ones are too short and have the wrong ends, and an air filter assy. I'm probably forgetting some small stuff, but you will discover it as you go along.
When I did mine I bought a complete harness from someone parting out his car, made the job much easier.
You will also need a new throttle cable, and a new kickdown cable. The TBI ones are too short and have the wrong ends, and an air filter assy. I'm probably forgetting some small stuff, but you will discover it as you go along.
When I did mine I bought a complete harness from someone parting out his car, made the job much easier.
#3
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Car: Camaro Vert
Engine: 355 HSR
Transmission: A4
Axle/Gears: 3.73 S60
TBI to SD TPI
https://www.thirdgen.org/techbb2/sho...hreadid=216453
You'll need to get the injector connectors, ECM and a few extra ECM connectors.
https://www.thirdgen.org/techbb2/sho...hreadid=216453
You'll need to get the injector connectors, ECM and a few extra ECM connectors.
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Car: 92'Camaro RS
Engine: a loud one
Transmission: bolted to the engine
Andy,try this site. It helped me out alot on the wiring end.
http://www.chevythunder.com/
http://www.chevythunder.com/
#5
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Car: 1982 Z-28
Engine: 5.0 w/ Holly carb
Transmission: TH-700R4
Thanks to everyone, you have been a big help with this PITA project.
#6
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Car: 87 IROC - 67 Camaro
Engine: 383 TPI - ZZ4 TPI
Transmission: 700R4 in both cars
Axle/Gears: 3.27 - 3.36 posi in both cars
I just finished my 91' Chevy truck TBI to TPI. I used a painless wire harness. I also changed out all sensors to TPI just to be on the safe side. You'll have to extend the fuel lines and of course change your fuel pump. I used a new stock 350-TPI Delco in-tank pump.
Just fired it up today.
Good luck
Just fired it up today.
Good luck
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