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Alternator Question! amp rating

Started by 1st_charger, April 06, 2009, 02:15:35 PM

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1st_charger

April 06, 2009, 02:15:35 PM
How do you tell what amp alternator you have by looking at it? I have the one on the car and an extra one I was going to have rebuilt as a spare and was wondering how to tell what the amp rating was! Thanks for your help!!!

maxwellwedge

#1
April 06, 2009, 06:46:30 PM
What is the casting number on the pad?

1st_charger

#2
April 11, 2009, 04:12:09 PM
the numbers on the alternator are 3438713    5305

maxwellwedge

#3
April 11, 2009, 07:17:18 PM
Quote from: 1st_charger on April 11, 2009, 04:12:09 PM
the numbers on the alternator are 3438713    5305

Are you sure it is not 3438173? I can't find a 713. This high a part number should be a 2 field alternator - '70 up but your pic is a 69. Are you running a dual field alternator?

If it is 3438173 that is a 50 amp unit....standard is 37 amp.

1st_charger

#4
April 11, 2009, 09:19:10 PM
Yes your right! I got those two numbers backwards! Yes it has two field connections! My car is a 69 but there it's not factory stock!  Thanks for the reply!
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