Re: 1951 Packard parts car with AIR CONDITIONING

Posted by HH56 On 2013/10/1 10:11:53

Several have mentioned the Sanden clutch handles 6v reasonably well and there are a few units known to be in operation. Don't have any feedback data or first hand experience from those people -- other than they say it works. I'm just in the process of starting to play with mine so nothing concrete in the way of data to report.

I have already done some work testing a modern evaporator blower with a 12v motor running on 6v. This is the type motor with multiple leads out for 3 fixed speeds -- not the electronic control type or those with only 2 leads and a rheostat/resistor speed selection. I had an under dash unit from a previous project and bought an Old Air trunk unit for the 47. Both have been running on 6v for hours at a time.

Aside from a lower blower output -- maybe equivalent to a medium to medium high speed instead of a full 12v high speed -- both seem to be handling 6v very well. No sign of stress or overheating in any of the electric components so far. Posted actual numbers in another thread but IIRC, amps are in the 6-7 range at high.

Should something prove it will need a 6v motor, the OldAir unit is single shaft and modular so it will be easy to adapt a regular heater motor. Of course, that would also require some change to the electric as most modern universal heater motors are 2 lead and use resistor control.

For anyone else contemplating a 6v application, so far if you could put up with a lower airflow, it looks to be a possibility. I think there are a couple of units made for under dash use that have a single shaft motor but haven't researched those enough to know if they are a candidate for a motor swap if one is proven to be needed.