pulley sizes
Heres the combo I'm running, measured from the back side, on water pump puller 7", alternator is 2 7/16, crank shaft is outer belt 6 5/8 inner is 8" I run this on a blown 460 (473) and my alternator puts out 14 volts at idle (stays constant) I needed good voltage, 2 holley fuel pumps, 2 14" electric fans, msd6al and btm, so voltage was important. Temps are 180 and on hottest days here 105 degrees, my temps in traffic can reach 200. I do have an external oil cooler, the oil temp pretty much mirrors water temp after warm up. Your alternator pulley sounds too big to give good charging, to tiny amount of horsepower you gain from under driving them is not worth the charging and cooling woes.
Heres the combo I'm running, measured from the back side, on water pump puller 7", alternator is 2 7/16, crank shaft is outer belt 6 5/8 inner is 8" I run this on a blown 460 (473) and my alternator puts out 14 volts at idle (stays constant) I needed good voltage, 2 holley fuel pumps, 2 14" electric fans, msd6al and btm, so voltage was important. Temps are 180 and on hottest days here 105 degrees, my temps in traffic can reach 200. I do have an external oil cooler, the oil temp pretty much mirrors water temp after warm up. Your alternator pulley sounds too big to give good charging, to tiny amount of horsepower you gain from under driving them is not worth the charging and cooling woes.
