<VV> Fw: 100 Amp Alternator Option/Idle charging

HallGrenn at aol.com HallGrenn at aol.com
Thu Jul 29 10:55:33 EDT 2010

I don't have my catalogue available (somewhere in the basement--that's what 
 I get for only partially reorganizing), but a good rule of thumb is 
alternator  pulley size.  If the new, higher output, alternator has a smaller 
diameter  pulley than the Corvair's then you will need a faster idle to energize 
the  alternator.  The minimum RPM for a 63amp alternator--if I remember  
correctly--is 1500RPM (that's alternator RPM).  I have run a 63A alt. on my  
Greenbrier for almost 20 years with no problems except occasionly at idle and 
 high load conditions.
Bob Hall
Group Corvair
In a message dated 7/29/2010 12:44:29 AM Eastern Daylight Time,  
hmlinc at sbcglobal.net writes:

I needed  to confer before I responded to this one.  From my "secret"  

"Some people just make it harder than it should be. You can buy  a 100amp 
upgrade external very easily but why? It does not charge well at  idle. 
That's why we use the 63amp one from the parts store. More than  plenty of 

Later, JR 

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