[Gaz64]

Originally Posted by allcarfan

hate to rehash this thread, but it seemed appropriate. is this voltage drop normal?

I have a 140amp powermaster alternator in my new back draft vehicle. all grounds and power leads are good. I get 14.66volts at my battery. I flick on my heater and the volts drop to about 13.4. Turn on electric fans, lights, etc, and I drop to about 12.

The trouble with a lot of high output alternators is their output at idle is not as good as a factory 60-70 amp alternator.