Re: Aftermarket Air Conditioning

Posted by DavidPackard On 2023/7/9 20:53:46

Howard I’m sitting here trying to figure out if the gentleman converted from 6 v to 12v, only to drop the voltage back down by running the fan at medium speed (likely to limit the current). I must have been absent from class the day that HVAC blower motor voltage discussion took place. My ’54 Cavalier (6+) has a single 3/8 inch belt aftermarket AC system that works just fine. It’s a long belt installation that uses the power steering sheave. The clutch coil has a resistance of 3.6 ohms, which is the same as a 12 v coil in my ’99 Chevy. My evaporator does not seem to have any voltage converter . . . at least not obvious, and I’ve looked. My current thought is the highest fan setting in my car is providing 7+ volts to the blower motor, and that voltage provides enough air flow to convince me the AC is working just fine. I’ve had no success finding an aftermarket evaporator (or blower motor) specifically for 6 volt cars, but I have found a lot of threads that say a 12v AC can’t possibly work on 6 volts! I haven’t found a ‘wide-belt’ solution yet . . . maybe a double 3/8 system would mimic the look, but I suspect a serpentine pulley could be modified.

dp