Fwd: <VV> High Current Alternator

[HallGrenn at aol.com]

In a message dated 9/22/2005 12:06:46 AM Eastern Daylight Time, pp2 at 6007.us 
writes:
Memory sez that the 10 DN (external regulator) was available in 37, 42, 55, 
and 63 amp versions and you could mix or match stators and armatures to get 
different outputs. The 42 and 63 amp versions did not put out as much at 
idle as the 37 and 55 but crossed over at higher rpm.

These were replaced by the 10 SI series around 1971-72 and are the internal 
regulator version in approximately the same form factor and were available 
in 55, 80, and 100 amp versions. For high output alternators generally you 
need look no further than the biggest Cadillac of the year.
Padgett's info matches mine.  My info on the 42 and 63 amp (and some others) 
also points to the low output at idle--but this wasn't due to the alternator, 
but to the larger Corvair pulley.  The alternators need to turn at about 1500 
rpm to make their rated output and the larger Corvair pulley means they turn 
too slowly at our idle.  We can't use the newer, smaller pulley because the 
reverse rotation of the fan causes overheating problems.  My alternator 
conversions run just fine, but sometimes I have to speed the engine up a tad in high 
load conditions and in stop and go traffic.

Bob Hall
Group Corvair
'64 'Brier, '65 Corsa, 2 '68 Monzas