Alternator alternatives? - JeepForum.com
 
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post #1 of 12 Old 01-09-2008, 02:04 PM Thread Starter
Brokagain
 
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Alternator alternatives?

I would like to pick up an alternator at the junkyard for my 93 YJ. I need more amps, especially at the speed I put around on the trails. I saw a thread here a while back and someone mentioned a couple of Cadillac years that would bold right in.

I don't want to fab a bracket, and I want to know that a high amp alternative would work.

The guy at the yard said no, but, what does he know about this kind of stuff?

Anybody know what years, makes?

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post #2 of 12 Old 01-09-2008, 02:11 PM
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I don't know about Caddys, but this might interest you,


http://www.bc4x4.com/tech/2004/jeepalt/

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post #3 of 12 Old 01-09-2008, 02:17 PM
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The problem is less about the mounting and more about the delco caddy alternator (CS-144) is internally regulated and your current alternator is externally regulated via the ecm. There may be a solution for that problem but I can not help further since I am lucky enough to have the last year that works for a direct delco bolt in.

search a little more this was a topic that got beat up pretty good a few months ago.

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post #4 of 12 Old 01-09-2008, 05:52 PM
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Replacing the alternator won't help much if you are having a charging problem because running at low rpm.
You'll be turning the replacement at the same speed and it won't do much better.
You could put a smaller pulley on the alternator to increase the speed at low rpm.
I'm just thinking and sharing my take on it.
Quote:
Originally Posted by Brokagain
I would like to pick up an alternator at the junkyard for my 93 YJ. I need more amps, especially at the speed I put around on the trails. I saw a thread here a while back and someone mentioned a couple of Cadillac years that would bold right in.

I don't want to fab a bracket, and I want to know that a high amp alternative would work.

The guy at the yard said no, but, what does he know about this kind of stuff?

Anybody know what years, makes?
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post #5 of 12 Old 01-09-2008, 06:49 PM Thread Starter
Brokagain
 
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Quote:
Originally Posted by pat8942
Replacing the alternator won't help much if you are having a charging problem because running at low rpm.
You'll be turning the replacement at the same speed and it won't do much better.
You could put a smaller pulley on the alternator to increase the speed at low rpm.
I'm just thinking and sharing my take on it.
Yeah, I have hopes of installing one that makes good amps at low rpm. I'm not having a charging problem, at least not yet. I don't drive my 93 on the roads so much anymore so I'm thinking more amps at lower rpms would keep the battery fully charged for a good winch fest, extra night lights, cb, etc., etc. And, the way I wheel, I go a ways, do an obstacle, shut the jeep off and watch the fun. Stop, Jeep, repeat.
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post #6 of 12 Old 01-11-2008, 04:56 PM
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try this link, it has a great chart to show all the options that you could find at a U-pull and are OEM or close
http://4bangerjp.com/forums/index.php?topic=400.0
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post #7 of 12 Old 01-11-2008, 05:10 PM
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93 Caddy Fleetwood Brougham is a CS-144 and making a bracket is truly VERY simple.....

at idle my alternator puts out about 75 amps which is about what my stock alternator did MAX. at 1700 or so rpm's my alternator is putting out about 130amps and by 2k rpm's it's putting out a hefty 150amps

as for internal vs external regulated alternators... what year did the ecm start regulating voltage? i was under the assumption it wasnt until the tj although i never really looked into it.

swapping to an internally regulated alternator would be simple enough though.... after all, it's just a wire or to....

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post #8 of 12 Old 01-11-2008, 07:09 PM
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Quote:
Originally Posted by Big-n-Broke-YJ
93 Caddy Fleetwood Brougham is a CS-144 and making a bracket is truly VERY simple.....

at idle my alternator puts out about 75 amps which is about what my stock alternator did MAX. at 1700 or so rpm's my alternator is putting out about 130amps and by 2k rpm's it's putting out a hefty 150amps

as for internal vs external regulated alternators... what year did the ecm start regulating voltage? i was under the assumption it wasnt until the tj although i never really looked into it.

swapping to an internally regulated alternator would be simple enough though.... after all, it's just a wire or to....

I did not research this completely, since I have the old style alternator. But, I know there was a thread floating around that said something about fooling the ecm into thinking there was an alternator connected but hooing up a light bulb or a resistor. Something along those lines. It can be done.

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post #9 of 12 Old 01-11-2008, 08:04 PM
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Quote:
Originally Posted by Big-n-Broke-YJ
what year did the ecm start regulating voltage?
91, same year they went to MPI. 87-90 the CS-144 or other delco alt is usually the simplest option for good return, 91+ the grand cherokee swap is pretty much the way to go. both put out similar amperage and bracket modifications are kept to a minimum by using very similar housings for the respective years.

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post #10 of 12 Old 01-14-2008, 07:22 AM Thread Starter
Brokagain
 
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Somebody is way smarter than me. I went to the local u pull it and in every grand cherokee that should have had the alternator needed, it was gone!

If I don't find one at a resonable junkyard price I may have to wait until I do have problems and get an aftermarket high amp alternator.
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post #11 of 12 Old 01-14-2008, 07:31 AM
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post #12 of 12 Old 01-14-2008, 08:16 AM
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Quote:
Originally Posted by Brokagain
Yeah, I have hopes of installing one that makes good amps at low rpm. I'm not having a charging problem, at least not yet. I don't drive my 93 on the roads so much anymore so I'm thinking more amps at lower rpms would keep the battery fully charged for a good winch fest, extra night lights, cb, etc., etc. And, the way I wheel, I go a ways, do an obstacle, shut the jeep off and watch the fun. Stop, Jeep, repeat.
If you can't figure one out you may want to store an extra battery and if its getitg undercharged swithc the sucker. ta s pare battery is liek 50-70 dollars and just store it in the back.
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