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Re: 800 ford 12volt conversion what altenator to use.

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01-10-2013 18:52:53

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Most use GM, like a 10si, they're cheap and available everywhere.

One wire or the three wire, either will work.

I like the 3 wire ones with the exciter wire.
It doesn't have to spin as fast to get started charging.

I don't have to tell the guys at my parts store what vehicle,
but late 70's early 80's Chevy pickup would probably work.

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01-10-2013 19:37:19

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 Re: 800 ford 12volt conversion what altenator to use. in reply to Royse, 01-10-2013 18:52:53  
How do you wire a 1980 alt.? Some say to get a 2 wire plug than take one of those wires and go back to the battery terminal on the alt? Something like that? Or is that for the 1968 alt or so?

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01-10-2013 20:41:00

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 Re: 800 ford 12volt conversion what altenator to use. in reply to jmducks1, 01-10-2013 19:37:19  
First off any alternator in the 60s and early 70s used an external V.R which you do not want. The ones on like I said a 1980 Chev pick up had the internal V.R which you do want. The 2 wire plug has markings of #1 and #2. The #2 goes to the bog stud on the alternator and what it is is the sensing wire for the VR which tells the alternator VR when to shut off. The #1 wire is how a person turns the excite circuit on. But you need the diode I told you about or the alternator can/will back feed the ignition so you can not shut the engine off

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01-10-2013 19:02:20

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 Re: 800 ford 12volt conversion what altenator to use. in reply to Royse, 01-10-2013 18:52:53  
Just to let you know has to be later then the 1974 I think 75 was the first year but could be the 74 that had the internal regulator. I always say 1980 since I am 100% sure on that since I also drive a 1980 Chev no power any thing no AC

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