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High output Alternator

Posted: 2/18/26 10:06amMessage 1 of 2

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79dblancha

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Weatogue, CT - USA

Joined: 6/29/2015

Posts: 103

Vette(s): 1979 C3 L82 383 cu in

The stock C3 alternator puts out 61-63 amps. I read as one of the recommended upgrades for classic cars is to add a high output 100-140 amp. alternator. I added dual electric fans to the radiator so I'm thinking this would be a good idea for my 79'.

Has any member done this and if so do you have a part number of the alternator that fits correctly?

thanks

"Made to be run hard"

Simsbury, Ct.

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Re: High output Alternator

Posted: 2/18/26 4:35pmMessage 2 of 2

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BillHanna

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Cana, VA - USA

Joined: 7/3/2016

Posts: 392

Vette(s): 1975 Stingray 71 350 engine Flat top pistons Sniper fuel injection Hyperspark ignition Vintage Air air conditioning Borgeson power steering box

I bought a 140 amp alternator from Summit Racing. This can be used either as a "1 wire," or standard GM type. It works fine.

Check Summit's site for the number.

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High output Alternator

Re: High output Alternator

in Forum: C3 Electrical, Body and Interior