Your not bringing enough air through the condenser. At 2000 rpm (in park)hi speed fan and MAX or recirculate bring your low side to between 30-35 on the gauge. This will give you very close to the right amount of freon. With all that if your situation does not better at an idle. Buy a heavy duty fan clutch such as a Haydon. You need to get as much air through your condenser as possible!!!!!! You are running 134A in a system that was designed for R12, the condensers on cars designed for 134A have more fins per inch. No real need to change the condenser though. I run 134A in my 71 T/A with no fancy tricks, ice cold on a 95* south Florida day, five years now.
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1978 Black & Gold T/A [complete 70 Ram Air III (carb to pan) PQ and 12 bolt], fully loaded, deluxe, WS6, T-Top car - 1972 Formula 455HO Ram Air numbers matching Julep Green - 1971 T/A 455, 320 CFM Eheads, RP cam, Doug's headers, Fuel injection, TKX 5 Spd. 12 Bolt 3.73, 4 wheel disc. All A/C cars
Last edited by FrankieT/A; 06-16-2014 at 08:20 PM.
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