Advice please, on this; Have 87 sunbird, aftermarket ac done in 88 (R12), changed to r134a 2 yrs ago. Lousy. The radiator fan from factory has NO shroud, and condenser has only one fan, which was adequate with r12.
Should/could I add a fan WITH a shroud on the radiator to help/and also add a fan adjacent to condenser too? Would this help ac to generate cooler air say, 4-5 deg f cooler?
beware of the arrival
when you went from R12 to R134a, did you change the TXV to a R134a type?
TVX is the expansion valve. For optimal performance, you should change the TXV to a r134 type. You want to keep the refrigerant and the TXV matched. You're looking for 4 to 5ÃÂ° so every little bit of matching will help.
All depends on what your high side pressure and condenser temp readings are!
If you have the typical tube and fin condenser of that era, replacing it with the largest parallel flow that will fit in the space should help a lot more than fans would.
Fans only count when the car is sitting still or moving slowly. At highway speed, the blast of air from the motion of the car is stronger than any fan action. So if it doesn't get real cold on the highway either, the problem is more than just fans.
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