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What's the factory Amp rating for a Factory Alternator?


 
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DirtyRedTJ
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Joined: 18 Feb 2004
Location: Gainesville, Georgia

PostPosted: Thu Mar 04, 2004 12:08 pm    Post subject: What's the factory Amp rating for a Factory Alternator? Reply with quote

I have done a little searching and I come up with 90 amps for the stock alty on 98 TJ's. Can anyone confirm this number? I'm not looking for a lecture on SAE amp ratings, just wondering what the SAE rating is.

(I am aware of the rating system, and the fact that a 90 amp alty does not produce nearly what it's rated for.)
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Code3TJ
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PostPosted: Thu Mar 04, 2004 12:18 pm    Post subject: Reply with quote

Somewhere I read that standard on a 97 was around 80 and 115 on sports and saharas. I'm trying to find it and I'm not sure if that changed with the 98's.
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Black2001TJ
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PostPosted: Thu Mar 04, 2004 12:30 pm    Post subject: Reply with quote

I know it was an option on 2001s to go with the higher, not sure what the higher was though, but I got it Wink
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KnightFire
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Joined: 07 Jan 2004
Location: Hanover, MD

PostPosted: Thu Mar 04, 2004 1:15 pm    Post subject: Reply with quote

I know my 02 "X" Came with a 117amp alternator.

HTH




KnightFire
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Black2001TJ
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PostPosted: Thu Mar 04, 2004 1:27 pm    Post subject: Reply with quote

KnightFire wrote:
I know my 02 "X" Came with a 117amp alternator.

HTH




KnightFire


That sounds familiar for mine, 117.. But it was an option on 01s and I think on 02s, X, Sport, Sahara, it was standard...
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ehirner
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PostPosted: Thu Mar 04, 2004 1:54 pm    Post subject: Reply with quote

Check out this writeup if you want to know how to upgrade to 136amps.
http://www.jeepsunlimited.com/forums/showthread.php?s=&threadid=431035
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K9Jeep
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Joined: 23 Jan 2004
Location: WTF, VA

PostPosted: Tue Mar 09, 2004 8:14 am    Post subject: Re: What's the factory Amp rating for a Factory Alternator? Reply with quote

DirtyRedTJ wrote:
(I am aware of the rating system, and the fact that a 90 amp alty does not produce nearly what it's rated for.)


Actually, the outputs are truthful. The problem is that it's required to be spinning at nearly 8,000rpms to obtain it. At Idle, expect about 10-15a. You can chart it out from there..

On Ebay, there is a seller doing 160a versions for Jeeps at $99 each. I think minimum output begins at 80 amps.

The OEM specs sound right.. 85 & 117
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