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Topic: R12 pressures

in Forum: C3 Cooling and Heating Systems


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R12 pressures (1/5)
 8/28/07 6:11pm
RedwingvetteLifetime Member
Lifetime Member
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Waterford, MI - USA

Vette(s):
1973 Red coupe


Joined: 9/13/2002
Posts: 1735

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


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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 (2/5)
 8/28/07 8:27pm
mkapp7879
Former Member

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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 (3/5)
 8/28/07 10:16pm
RedwingvetteLifetime Member
Lifetime Member
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Waterford, MI - USA

Vette(s):
1973 Red coupe


Joined: 9/13/2002
Posts: 1735

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 (4/5)
 8/30/07 7:05am
my7t1Lifetime Member
Lifetime Member
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Dorr, MI - USA

Vette(s):
71 Colonnade Hardtop Coupe Torch Red with black interior originally L48 built to push around 360hp


Joined: 8/21/2002
Posts: 2581

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 (5/5)
 8/30/07 2:39pm
RedwingvetteLifetime Member
Lifetime Member
Send Private Message

Waterford, MI - USA

Vette(s):
1973 Red coupe


Joined: 9/13/2002
Posts: 1735

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
 


Our Sponsors help support C3VR