140/80 amp Powermaster Natural Finish Alternator 1980-1991 47294

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140/80 amp Powermaster Natural Finish Alternator 1980-1991

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Part Number:47294

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Powermaster Motorsports is the leader in high performance OEM replacement alternators for the automotive industry.
Modern accessories can take their toll on a vehicle's electrical system. Powermaster offers High Amperage Alternators to give your electrical system the extra boost it needs. If you have added lights, winches, or other power hungry accessories, Powermaster offers easy to install high amp upgrades.

Note that the alternator comes with a single-groove pulley. If you have a double-groove pulley, you will need to change them over (they are a direct swap). Also, if you have an older model vehicle with an external voltage regulator, you can use this alternator with some minor wiring changes under the hood. This will allow you to remove the external regulator and associated wiring too!

These are rebuilt here in the USA!

Q: Will this alternator bolt straight onto a 1982 Cherokee with the 351 V8? 140 amps at 5-6000 rpm and 80 amps at idle right?

Asked by: Steve - 2/18/2019

A: The 1982 Cherokee came with an AMC 360 V8. A 351 is a ford engine, and not the same as the AMC's. This alt produces 80amps at idle, and up to 140 amps at higher RPM's. This alternator will bolt up to any 1980-1991 Full Size Jeep listed.

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Answer provided by: Ryan (2/25/2019)

Q: Would this unit require any modifications to my electrical system? I have a 88 GW with the stock set up alt. Mine quit charging and am looking at options to upgrade since I plan to add fuel injection at some point. Thank you.

Asked by: Matt - 7/10/2018

A: No, you can install this as long as your existing wiring is in decent condition.

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Answer provided by: Ryan (7/11/2018)

Q: What is an optional output alternator? Does 140/80 mean 80 amp at idle and 140 at higher rpm?

Asked by: GW - 12/7/2021

A: Correct!

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Answer provided by: Amanda (12/8/2021)

Q: My 81 J truck is an all stock non ac rig, so I am assuming it has the 63 amp alternator at best, mine is still working and keeps the battery charged but when i have to run the wipers, lights, and defroster at the same time it doesn't seem to provide enough amps especially at idle. I want to replace it with one of these upgraded units hoping it will resolve this issue. My real question is, since I don't have any extra power accessories installed is there any risk of overcharging the battery if I install this on my rig?

Asked by: steve - 2/18/2022

A: No issues with overcharging. The larger the motor, the less work it does to accomplish the same task.

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Answer provided by: Ryan (2/19/2022)