hi 1/ some factory fitted run low ,low side pressures with no ill effect . Assuming its all about heat load and air flow plus evap design . Rule of thumb is 20--35psi . On an after market kit I would be suspicious . 2/ temp rise after compressor switch off [hysteresis] 3-5deg cel .. 38-40f diff with...

hi LOW pressure ideally 20--35psi Remember freezing is approx 30psi There are exceptions eg Nippon Denso ,just 1x brand that operates lower . Remember evaporator design and air flow design can influence this . Also the a/c units that run lower psi -temps nearly always run an electronic thermister as...

hi high side pressures for R12 were regularly at 150psi or lower in moderate weather . This would mean a refrigerant temperature of R12 /150psi= 117f in modern terms R134 / 170psi =117f . So r134a is about 20psi higher at same refrigerant temp . Remember ALL things R12 operated refrigeration etc ope...

hi If your going to use compressed air , use whats called an air drying desiccant snake commonly used by spray painters to treat there air supply . Made by Devilbiss . Google it . Use Shell X55 white spirit solvent . Very mild degreaser and cleaner . Will completely evaporate. The dispensing tool wo...

hi
The procedures on how to charge and Charging limitations guide has been mentioned

hi Done many 2nd condenser in series connection . Design of first factory condenser can be bigger or but usually smaller than the aftermarket second unit thats installed . Combinations of tube/fin and serpentine and parallel flow take your pick they all work in series . Common pressures on high side...

hi 1st vacuum pump change oil test pump and check to see if it can reach 29 inHg 2nd check gauges are not leaking internally --replace sealing washers and tap o rings ---install new manifold seals ---install new hose rubbers Vacuum system for 45 mins to 1 hr Vacuum leak test 15mins Charge with gas/l...

hi Little content about the idle cut out or idle up in a few of the previous posts . Although the conversation on pulley ratios is interesting and an associated subject sure but still unrelated . RE modern car cut out , these are typically ECU controlled not what the topic is about . Once again any ...

hi
Cutout = compressor cut out , at idle in this case. Might try a carburettor linkage micro switch at idle to turn off compressor .

Delco solenoid not a good solution
Crank pulleys 5.5 inch 6.25 inch or 7 inch stock / 5.5 drag only / trying 6.25

hi Looking for a setup I am building at the moment SBchevy with carby and a street style cam . Anyways the prediction is the engine wont like the a/con compressor load without an idle up or a cutout . If I remember correctly back in the 80`s,,90`s there were Sanden idle cut outs . Carb is a Holley /...