Quote:
Originally Posted by david s poole
you are running 340 on the high side at 2000rpm.either this is a misprint,your fan clutch is not locking up or the system is a little overcharged.
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Unfortunately the fan clutch is good and I am not overcharged. I used 36 oz. which is 85% of the 42 oz. of R12 capacity. I could let a few oz. out but the impact at the vent would be tremendous and the A/C would no longer keep up on those 100 degree days. The 340 psi was taken while idling, and I'm sure it drops when the car is moving, but it is still much higher than I would like it to be. 300 would be nice. Previous owner had the system professionally converted about 8 years ago by an A/C shop, they flushed everything properly, used PAG, and changed the TXV and drier. Somehow, despite the pressures, the compressor is still nice and quiet and the system hasn't grenaded in 8 years. When I first bought the car, hooked up the gauges and the pressure was pretty much the same. This system is just not a good candidate for conversion. I have a bunch of R12 on hand and will convert back one of these days...