Quote:
Originally Posted by ALF
Did I get it correctly?
C3MF-10344-A Would be the holy grail and C3SF-10300-A is a valid alternative?
Is the pully diameter the only difference between them?
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It looks that way in my Ford parts lists by model. There is a significant difference in sheave (a.k.a. pulley) diameter between the two models.
The large (not quite 4 inches) single belt sheave for high performance engine rpm ranges keeps the alternator from failing due to higher than rated revolutions per minute when the engines are run hard.
The typical two belt passenger car sheaves are relatively small in outer diameter so that low engine rpm running is turning the alternator rotor fast enough to be doing something.