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Topic: R12 pressures

in Forum: C3 Cooling and Heating Systems


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R12 pressures

Posted: 8/28/07 3:11pm Message 1 of 5
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Redwingvette
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Waterford, MI - USA
Joined: 9/13/2002
Posts: 1754
Vette(s): 1973 Red coupe
My friend is coming over to recharge my AC after I repalced the condencer, it cracked and leaked out. Anyway, Wha are trhe high/low pressures suppose to be? We can't remmeber what we had the last time I had to fix the system.
Thanks



Brian - NCM Lifetime Member

73 coupe L48, Flat-top pistons, Performer RPM Heads, Crane Cam and roller rockers, Holley 650 vac sec. Performer intake,
3.55 gear BTO 200-4R trans,
Leather seats, Seatbelt Plus 3point seatbelts, Pioneer CD player
Magnaflow Exhuast System

Dewitt radiator and dual electric fans
Borgeson Steering box
 


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R12 pressures

Posted: 8/28/07 5:27pm Message 2 of 5
mkapp7879
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Joined: 10/21/2003
Posts: 1220

Might be too late for ya but....

outdoor temp @ 80, low 23-29, high 170-205

                           90, low 26-35, high 205-245

                          100, low 31-40, high 245-285

This from the chart that came with my gauges. Been using this info for 25 years with good results.




R12 pressures

Posted: 8/28/07 7:16pm Message 3 of 5
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Redwingvette
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Waterford, MI - USA
Joined: 9/13/2002
Posts: 1754
Vette(s): 1973 Red coupe
Thanks, I sould be in good shape for now.


Brian - NCM Lifetime Member

73 coupe L48, Flat-top pistons, Performer RPM Heads, Crane Cam and roller rockers, Holley 650 vac sec. Performer intake,
3.55 gear BTO 200-4R trans,
Leather seats, Seatbelt Plus 3point seatbelts, Pioneer CD player
Magnaflow Exhuast System

Dewitt radiator and dual electric fans
Borgeson Steering box
 


R12 pressures

Posted: 8/30/07 4:05am Message 4 of 5
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my7t1
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Dorr, MI - USA
Joined: 8/21/2002
Posts: 2581
Vette(s): 71 Colonnade Hardtop Coupe Torch Red with black interior originally L48 built to push around 360hp
How did the project go Brian? You should be in B.G., KY. by now. Mkapp's chart is pretty acurate. However I get a little nervous when the high starts ticklin the 300 range. On real hot day I'd like to see it closer to 250 at the most. Have a safe trip. Terry my7T12007-08-30 04:11:50



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R12 pressures

Posted: 8/30/07 11:39am Message 5 of 5
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Redwingvette
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Waterford, MI - USA
Joined: 9/13/2002
Posts: 1754
Vette(s): 1973 Red coupe
So far it is working good. I did have a concern that may crop up again, The hose started leaking at the fitting connecting to the back of th compressor. It stop and I am thinking it was caused by the extreme cold freon being introduced to a warm hose. Once it stopped and we finished the recharge it has not leak again. If it does I will be replacing it without question.


Brian - NCM Lifetime Member

73 coupe L48, Flat-top pistons, Performer RPM Heads, Crane Cam and roller rockers, Holley 650 vac sec. Performer intake,
3.55 gear BTO 200-4R trans,
Leather seats, Seatbelt Plus 3point seatbelts, Pioneer CD player
Magnaflow Exhuast System

Dewitt radiator and dual electric fans
Borgeson Steering box
 


in Forum: C3 Cooling and Heating Systems


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