Alternator amp/ air compressors - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Mikedub82 · 05-03-2011, 06:21 PM

Just realized the early 70's & 80's alternators are only 40/50/60 amp alternators. I am going to run 2 viair 444c compressors that are 30 amp draw each. I have a red top optima battery. Will the alternator be enough or will I have to find a bigger one.

**N2TRUX** · 05-04-2011, 10:51 AM

If you are running two compressors in unison, I think you should update your alternator. I would consider any of the 90+ amp units on the market.

Mikedub82 · 05-04-2011, 01:18 PM

I called a friend of mine at an alternator shop. If any of you guys wanted to up grade to a bigger alternator. The part # that any parts store could cross would be 7294. It comes 94 amp, but your local alternator shop could get you up to 150 amps. This alterntor should be factory for 87-90 chevy trucks. I has to be the one with the solid plastic fan on the front. You learn something new everyday!

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SCOTI · 05-04-2011, 01:42 PM

Quote:

Originally Posted by Mikedub82

I called a friend of mine at an alternator shop. If any of you guys wanted to up grade to a bigger alternator. The part # that any parts store could cross would be 7294. It comes 94 amp, but your local alternator shop could get you up to 150 amps. This alterntor should be factory for 87-90 chevy trucks. I has to be the one with the solid plastic fan on the front. You learn something new everyday!

Attachment 741504

The HO 305 Camaros (82-8x) typically also have an interchangeable alt w/higher amps.

05-03-2011, 06:21 PM	#1
Mikedub82 Registered User Join Date: Jul 2010 Location: "THE BIG EASY" New Orleans. LA Posts: 108	Alternator amp/ air compressors Just realized the early 70's & 80's alternators are only 40/50/60 amp alternators. I am going to run 2 viair 444c compressors that are 30 amp draw each. I have a red top optima battery. Will the alternator be enough or will I have to find a bigger one. __________________ Get Low

05-04-2011, 10:51 AM	#2
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,021	Re: Alternator amp/ air compressors If you are running two compressors in unison, I think you should update your alternator. I would consider any of the 90+ amp units on the market. __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

05-04-2011, 01:18 PM	#3
Mikedub82 Registered User Join Date: Jul 2010 Location: "THE BIG EASY" New Orleans. LA Posts: 108	Re: Alternator amp/ air compressors I called a friend of mine at an alternator shop. If any of you guys wanted to up grade to a bigger alternator. The part # that any parts store could cross would be 7294. It comes 94 amp, but your local alternator shop could get you up to 150 amps. This alterntor should be factory for 87-90 chevy trucks. I has to be the one with the solid plastic fan on the front. You learn something new everyday! __________________ Get Low



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