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Old 09-11-2006, 07:04 AM
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100 amp alternator help

Hello hotrodders, I have a 100 amp alternator that came out of a 85 chevy pickup. can i use this alternator in my 64 chevy 2? if so does anyone have a diagram or has made one? i'll be useing a electric fan, sony cd, msd 6al, pro billet distribitor, a barry grant 220 pumping fuel to 600 horse sbc for the street only. the battery is in the trunk. any help will be highly appreciated

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Old 09-11-2006, 09:41 AM
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alternator

need to take the alterator to a shop have
turn into single wire, self exciting
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Old 09-11-2006, 10:02 AM
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If it's internally regulated you can follow these directions:

http://www.chevelles.com/techref/ftecref14.html

If you want better regulation you can run the sense wire (#2 terminal in the pic) all the way to your 12v bus at the fuse block.
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Old 09-11-2006, 11:35 AM
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you can get the pigtail for that alt. from NAPA for $7. the white wire (diode protected)goes to a power source that comes on with the key and the red one hooks to the alt battery output post.Thats how I have the one in my truck
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Old 09-11-2006, 04:48 PM
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Doc here,

First, is the Alternator CS or SI series..

Next , Is the 64 Externally regulated?

Assuming the System is SI and External to internal..this is your diagram..



If it is CS and internal, it will be totally different..and not function as above.

WHICH is yours?

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Old 09-11-2006, 05:47 PM
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I have a 100amp alternator on my 150 Wagon. It's been on there for years. And I've run 100amp alternators on more of my '57 Chevies over the years.

Simple way to hook a GM alternator to a generator car is use a Mopar regulator like used on 1960s Mopars.

IGN wire from regulator runs to constant 12 volt like on a ballast resistor.
FLD of the regulator runs to FLD on the alternator.
Large post on the alternator runs to battery.

The one problem I have with this set up on my Wagon is you can see the lights surge at night. No one I know of who ran this type of set up on their Classic Chevy ever mentioned having this problem I do?
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Old 09-11-2006, 06:01 PM
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Quote:
Originally Posted by rj57
I have a 100amp alternator on my 150 Wagon. It's been on there for years. And I've run 100amp alternators on more of my '57 Chevies over the years.

Simple way to hook a GM alternator to a generator car is use a Mopar regulator like used on 1960s Mopars.

IGN wire from regulator runs to constant 12 volt like on a ballast resistor.
FLD of the regulator runs to FLD on the alternator.
Large post on the alternator runs to battery.

The one problem I have with this set up on my Wagon is you can see the lights surge at night. No one I know of who ran this type of set up on their Classic Chevy ever mentioned having this problem I do?
Doc here,

Sounds to me like Since you opted to run an external regulator..you have fallen victim to The adjustment of the field Coil, and Air gap solenoid on the regulator..

But my question is why run an external system at all? a 3 wire internal is much easier to install and much more reliable..(less part count) ..That's the way I'd go..(unless there is a REASON it won't run on that car (s) ).

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Old 09-11-2006, 06:49 PM
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3 wire with internal regulator is definatly what you want. One wires are easy but they are problematic and dont account for voltage drop downstream in the system.
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