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Old 12-30-2009, 04:59 AM   #1
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Default 1990 Cherokee Alternator upgrade?

Can i swap an alternator out of a v8 grand cherokee into a non H.O. motor? im looking for a higher amp alternator. found a powermaster 140 amp unit for 180 bucks. just wondering if there are any OE alternators i can swap in?
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Old 12-30-2009, 07:22 AM   #2
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I can't comment for sure on the non-H.O. but here's what worked for my 95:

http://www.bc4x4.com/tech/2004/jeepalt/
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Old 12-30-2009, 09:22 AM   #3
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Exactly the article i was thinking of. Haven't done it yet but need to do it here shortly. Nice thing is that it's a "stock" upgrade.
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Old 12-30-2009, 11:22 AM   #4
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Quote:
Originally Posted by stoneattic View Post
I can't comment for sure on the non-H.O. but here's what worked for my 95:

http://www.bc4x4.com/tech/2004/jeepalt/
Thanks for the info! I've been wanting to upgrade my charging system, but $300+ for aftermarket alternators was a bit too much.
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Old 12-30-2009, 02:39 PM   #5
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So i talked to my buddy at dodge and he said that the non H.O. and H.O. alternators are NOT interchangable.
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Old 12-30-2009, 05:57 PM   #6
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Through 1990, Jeep used Delco alternators with internal voltage regulators (Delco CS-130 for XJ/MJ, and I think 12SI for the YJ.) They swapped to Nippondenso across the board for 1991, with the regulator circuit in the PCM.

Any local shop should be able to upwind a Delco for you without too much trouble, and for not too much bux. If you can't find one by you, here's the shop I've been using for a number of years - www.kelleyswip.com/sjg.html. There is an ID guide on the site that will help you determine whether you've got a CS-series or an SI-series (I'm not sure, since you don't mention model. I could guess that it's an XJ or MJ, but I don't like to guess...)
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Old 12-30-2009, 09:22 PM   #7
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hey thanks it is from an Xj and like i said i found a delco style 140amp powermaster for 180. but i might consider a rebuild and upwind on my existing alternator. Thanks for the info i def appreciate it.

Last edited by totalycarcrazy; 12-30-2009 at 09:50 PM.
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Old 12-31-2009, 08:11 AM   #8
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Quote:
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hey thanks it is from an Xj and like i said i found a delco style 140amp powermaster for 180. but i might consider a rebuild and upwind on my existing alternator. Thanks for the info i def appreciate it.
'S what I'm here for.

NB: You will want to upgrade your wiring and fuse protection for the alternator - click the link in my sig for more information on that...

NB: The Delcos can be pushed to at least 200A max output - but most small shops aren't willing to do it for a couple of reasons: liability and parts cost. So, unless you're getting absolutely stupid with electrical accessories, running 140-150A should be plenty. If you need more, consider removing your aircon compressor and installing a "one-wire" Delco as a second alternator (the regulator is wired to pick up its signal internally, and therefore only one wire is connected.) Two-alternator systems can be quite reliable - Ford does it all the time on late ambulances and other emergency vehicles.
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