How Cold is your r12 retrofit to 134a?
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Joined: Oct 2006
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From: Charlotte NC
Car: 1991 Camaro RS
Engine: The Wicked six'ah
Transmission: 700r4
Axle/Gears: stock 3.08's
How Cold is your r12 retrofit to 134a?
Lets just keep it R12-R134... i know theres better refrigerants but GMAB....
Did a Evac and recharge few days ago... My systems as im sure all of ours holds 2.2lbs r12... and 134a doesnt take that much. so i guessed at 2lbs. I had while it was roughly 90*f... +/-3*
Min-62*F Steady in traffic, Max High
Min-50*F On Max High going down the interstate 2hrs steady 70-80mph
Accumulator temp was at 47*
Then Today, i Replaced the orifice tube to the Famous Ford Blue..
Same Temperature outside... on my way home tonite....
50-53* in traffic Max High
42-44* 20 minutes of mixed highway/city Driving.
Accumulator temp was at 37*f
8* may not be a huge difference....... But Im from Maine, Moved to NC a year ago. and i'll take the colder 8 Deg. It was def. worth it for me......
Is there any other smarter to use orifice tubes being used in our Thirdgen's??
Did a Evac and recharge few days ago... My systems as im sure all of ours holds 2.2lbs r12... and 134a doesnt take that much. so i guessed at 2lbs. I had while it was roughly 90*f... +/-3*
Min-62*F Steady in traffic, Max High
Min-50*F On Max High going down the interstate 2hrs steady 70-80mph
Accumulator temp was at 47*
Then Today, i Replaced the orifice tube to the Famous Ford Blue..
Same Temperature outside... on my way home tonite....
50-53* in traffic Max High
42-44* 20 minutes of mixed highway/city Driving.
Accumulator temp was at 37*f
8* may not be a huge difference....... But Im from Maine, Moved to NC a year ago. and i'll take the colder 8 Deg. It was def. worth it for me......
Is there any other smarter to use orifice tubes being used in our Thirdgen's??
Joined: May 2009
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From: Des Moines IA
Car: 89 forrmula
Engine: 350 TBI
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Re: How Cold is your r12 retrofit to 134a?
The deal with R134 is that it moves at a higher pressure so go offset that, I always suggest at some point swapping to a higher output electric fan to pull more heat out of the condensor-that faster the Freon moves through the system, the less time there is for heat dissipation.
Joined: Jan 2005
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From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: How Cold is your r12 retrofit to 134a?
Or just switch to R-152a aka Diflorethane aka Air Duster. I have it in my 2012 Titan and it gets down to 37°F on the highway and runs 50 psi less head pressure than 134. My 97 Express has Duracool which is a propane based blend. It blows ice cubes as well and also runs much lower head pressures..
Joined: Jan 2005
Posts: 10,426
Likes: 497
From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: How Cold is your r12 retrofit to 134a?
The deal with R134 is that it moves at a higher pressure so go offset that, I always suggest at some point swapping to a higher output electric fan to pull more heat out of the condensor-that faster the Freon moves through the system, the less time there is for heat dissipation.
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From: Houston, TX
Car: 1989 GTA
Engine: SuperRam 350
Transmission: Pro Built S/S TH700R4
Axle/Gears: 3.27
Re: How Cold is your r12 retrofit to 134a?
8° is a huge difference! The blue orifice tube definitely looks to be worth the $5 cost.
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