Re: Alternator spin direction? Does it really matter?
Originally posted by exoticcarsgonewild An alternator produces AC voltage. So, AC voltage is produced by spinning in any direction right? Does it matter which direction the alternator spins? I am assuming it doesn't matter.
Cars are DC voltage not AC voltage.
And yeah you need to spin the alt in the direction of the cooling fins.
--1988 Mustang LX 5.0--
--2014 Ford Taurus Limited--
The twin diode bridge use to make DC will still make a positive DC if the AC source is reversed. This is full wave (180 degree) rectification. A negative voltage could not be produced unless the source winding was center tapped and used as a "zero " reference.
It will work either direction, but cooling is designed for the stock rotation for best cooling. Won't cool very well in reverse rotation.
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