anybody know
Thread Starter
Joined: Mar 2002
Posts: 587
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From: middle TENNESSEE
Car: 1989 Iroc rebuild
Engine: 355 carb'd
Transmission: 5spd
Axle/Gears: 3:08 pos for a while
anybody know
of an AC refrigerant that is 76% R-22, 20% R12, 2.5%R134-a 1.5%HC ?
What for? 
Supreme Member
Joined: Jul 2005
Posts: 2,123
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From: North Central Mass.
Car: 1985 Berlinetta
Engine: Megasquirted TPI
Transmission: Transgo 700R4
Axle/Gears: 3.42
I'm guessing he had a shop look at his ac and they wouldn't touch it because of that mess in his lines.
I have never heard of a that mixture. Sounds like the previous owner was none too picky with what he put in there.
I have never heard of a that mixture. Sounds like the previous owner was none too picky with what he put in there.
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Joined: Mar 2001
Posts: 14,298
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
Keep in mind that each of the refrigerants, IE R12, R22 and R134a are slightly different opperating ranges for the most efficiency. Because your AC sensors work by pressure, they determine when to turn on and off your compressor to get the proper temperatures and operating ranges. If you mix and match it might not work the way you think it should because the sensors are not calebrated for that mix.
JOhn
JOhn
Senior Member
Joined: Dec 1999
Posts: 954
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From: Annandale, VA
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
PSI?
I read the tech article and did not find any info. Does anyone know how many PSI of charge to put in. My system was converted few years ago. I do not want to over charge.
Junior Member
Joined: Jan 2006
Posts: 95
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From: northern maine usa/
Car: 1988 iroc/2000 saab 9-5
Engine: 355 tpi/Roller cam
Transmission: 700r4/2800 stall,megashifter
Axle/Gears: 3;42
Anybody know question,sounds like a truck mechanic was in the system,at one time or another.
Suction pressure should be around 30/40 running,and discharge shall rise to/not more than 350/ or so
Suction pressure should be around 30/40 running,and discharge shall rise to/not more than 350/ or so
Junior Member
Joined: Jan 2006
Posts: 95
Likes: 0
From: northern maine usa/
Car: 1988 iroc/2000 saab 9-5
Engine: 355 tpi/Roller cam
Transmission: 700r4/2800 stall,megashifter
Axle/Gears: 3;42
R22, i know here,most people convert to 502, or 404A,similier to the R12/134a conversion.
Ive used HP66,on the R12, or 134 A,system and it works,but its really not the correct way to do things.
R22 in a R12 system, may work, but ive never done it.
For the price of 134a,id start new, its like 4 bucks a pound here.
Ive used HP66,on the R12, or 134 A,system and it works,but its really not the correct way to do things.
R22 in a R12 system, may work, but ive never done it.
For the price of 134a,id start new, its like 4 bucks a pound here.
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Joined: Mar 2001
Posts: 14,298
Likes: 197
From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
Originally Posted by Keepin This One
R22, i know here,most people convert to 502, or 404A,similier to the R12/134a conversion.
Ive used HP66,on the R12, or 134 A,system and it works,but its really not the correct way to do things.
R22 in a R12 system, may work, but ive never done it.
For the price of 134a,id start new, its like 4 bucks a pound here.
Ive used HP66,on the R12, or 134 A,system and it works,but its really not the correct way to do things.
R22 in a R12 system, may work, but ive never done it.
For the price of 134a,id start new, its like 4 bucks a pound here.
Here inlies the problem... You can't just go out and purchase the different switches necessary to do the conversion for our cars. Going beyond that because 22 works at different pressures I am not sure if the pump is adequate or if it works too hard to let the system work properly.
134A is technically suposed to be the conversion, I would probably stick to that route.
John