I have been watching my dumby voltage guage and noticed it moving coming off idle. Well i Just remembered that I have underdrive pulleys and never replaced the alternator pulley.
I found just an overdrive alternator pulley on ebay that should put the rpms of the alternator back to about stock. But then I found one from MSD that "should" fit that would actually put the rpms little higher.
Stock i think is 57mm, this overdrive pulley is 48mm, and this msd one comes out to be about 42mm.
So to help out at idle i was thinking maybe it would be benificial to have some more amps then stock? I need to replace the one i have but which route would be best? Plus with the monster fuel pump, tranny cooler fan and anything else i have added it might not be a bad idea?
I found just an overdrive alternator pulley on ebay that should put the rpms of the alternator back to about stock. But then I found one from MSD that "should" fit that would actually put the rpms little higher.
Stock i think is 57mm, this overdrive pulley is 48mm, and this msd one comes out to be about 42mm.
ebay listing said:Ford alternator overdrive pulley. Has an outside diameter of 1 7/8" (48mm). 6 grooves
Will increase idle output by 20amps, over the standard 3G 57mm pulley, used on 94-95 GT Mustangs. For use on 87-93 Mustangs with 3G upgrades and underdrive crank pulley.... or use on 94-95 with underdrive crank pulley, to get the alternator speed back to stock RPM.
6 groove 48mm pulley
So to help out at idle i was thinking maybe it would be benificial to have some more amps then stock? I need to replace the one i have but which route would be best? Plus with the monster fuel pump, tranny cooler fan and anything else i have added it might not be a bad idea?