R4 serp belt ac install/parts help
06-17-2022, 03:10 PM
#1
R4 serp belt ac install/parts help
Gearing up to start putting AC back in the car. I believe I'm going with the holley R4 mount and a later model R4 compressor. This leads me to believe I can re use all the factory hoses and such. I have an 87 car with full hvac.
What other items am I looking at needing to pick up that are specific to the use of a 98 PCM?
I'm. Assuming I have to wire up ac signal(from hvac unit) to the pcm? High/low psi switches, idle increase, and rpm cut out?
Does anyone have the specifics?
Thanks.
What other items am I looking at needing to pick up that are specific to the use of a 98 PCM?
I'm. Assuming I have to wire up ac signal(from hvac unit) to the pcm? High/low psi switches, idle increase, and rpm cut out?
Does anyone have the specifics?
Thanks.
07-02-2022, 12:13 PM
#2
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Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Re: R4 serp belt ac install/parts help
The wiring has been covered several times here already. If you're running 134 then you can have the ECM run the compressor. I still run R12 and letting the ECM run the compressor seems to be a mistake.
The stock TPI AC setup fits right into the Holley bracket, you just need to rotate the compressor and tweak the hard lines a bit to clear the overflow. THe stock AC from a TPI is also "stand alone". I am going to switch my AC back to this setup
The stock TPI AC setup fits right into the Holley bracket, you just need to rotate the compressor and tweak the hard lines a bit to clear the overflow. THe stock AC from a TPI is also "stand alone". I am going to switch my AC back to this setup
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