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Increase Alternator Output and Cooling with Pulley
Size
Pulleys
shown, L-R: 2-3/8" diameter, 2-1/4",
2", and 1-7/8"
Yes, you can increase your alternators overall
output
as well as increase power output at engine idle speeds.
Check the size of the pulley on your alternator. If you are having problems
with overall alternator output or charging at engine idle, maybe a smaller pulley is all you
need. The most common pulleys on GM, Ford and Daimlier/Chrysler vehicles are the
6-groove 2-7/16, 2-3/8 and 2-1/4 inch
pulleys, by reducing the pulley size to 2" or 1-7/8" your
alternator will start producing power sooner and produce more power cruising
down the boulevard or on the highway. Also, because your alternator is
spinning faster the fan will move more cooling air through the alternator
adding to component life.
Caution must be noted: Changing the pulley size on your alternator may
void the manufacturers warranty. Faster spinning alternator will increase
brush wear and using a smaller pulley on a high revving engines can cause
component failure from extreme speeds.
