The alternator in my '63 is on its last legs and it's time to get a new one. Some of the ones recommended for '63 Cadillac are 55 amps, others are 61. I have no idea what's in the car now but since the car has power everything, would a 61 amp alternator be the way to go?
Thanks for the response! I was wondering the same thing about the extra amps, I guess if the volts remain in the normal range it shouldn't overcharge the battery--but I'm no expert.
Extra amps is never a bad thing. The alternator only draws what it needs so having excessive amps "in the bank" is never a bad thing. This way you have additional amps in reserve should they be required. Excessive voltage is a problem. Excessive amps is never a bad thing.
Thanks Greg, that is very good and helpful to know! I've checked the old alternator and it is only 52 amps, 3 below the minimum recommended for the car. That helps explain why sometimes I didn't have enough juice to make the power windows & seat work.
Here's the run-down on factory Specs:
1963 non-AC equipped 42 amps
1963 AC equipped 52 amps
1964 non-AC equipped 42 amps
1964 AC equipped 55 amps
Here's the low-down on replacement and rebuild alternators
- Looking at the amperage stamped on a rebuilt alternator, especially from the big box stores is meaningless. They often use original casings with new higher amperage guts (e.g. different stator) to provide a higher than stock amperage. For example. I have sold those AutoZone Duralast 7122 alternators for 15+ years that were rated 60 amps with casings stamped 42, 52, and 55 amps!
- unless you have added additional equipment (e.g. lights, sound system, etc) that pulls additional current, anything rated at 55 amps or more should be fine.