Alternator Woes...Pully Diameter? - ZR-1 Net Registry Forums

KJL · 09-04-2014

I have had intermittent issues with the alternator. I discovered the pully on the existing unit is quite large and it is very difficult to install and replace the serpentine belt. I had to use pliers to walk the belt off of the pulley. I purchased a new 140 amp Powermaster (I have heard good things about these) unit from Summit. The pulley on the new unit is smaller. It will probably still work but need to do a test fit. Should I swap pulleys? I am concern that the new unit will not behave properly if I use a larger size pulley.

Nothing is easy...

Any thoughts?

09-04-2014	#1
KJL Join Date: Mar 2013 Location: Roswell, GA Posts: 234	Alternator Woes...Pully Diameter? I have had intermittent issues with the alternator. I discovered the pully on the existing unit is quite large and it is very difficult to install and replace the serpentine belt. I had to use pliers to walk the belt off of the pulley. I purchased a new 140 amp Powermaster (I have heard good things about these) unit from Summit. The pulley on the new unit is smaller. It will probably still work but need to do a test fit. Should I swap pulleys? I am concern that the new unit will not behave properly if I use a larger size pulley. Nothing is easy... Any thoughts? __________________ 1995 ZR1 #159 Ported,Corsa,4.10 Rear, Dual Disc RAM Clutch, Alum Flywheel, Haibeck Chip, ZFDoc Plates, Relocated Battery 400 rwhp 1992 ZR1 #280 Ported, Locked Secondary's, Flowmaster Exhaust, Haibeck Chip, 375rwhp 1996 Collectors LT4 (Stock) 1972 Convertible 434 Small Block 572 rwhp