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Old 01-26-2010, 07:24 PM   #1
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Bigger Alternator

I want to add a bigger alternator to m 1999 TJ 4cyl. What are the direct stock replacments? I've heard a Dodge Ram P/U has one are there others?

Or is a new aftermarket model the best way to go?

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Old 01-26-2010, 07:52 PM   #2
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Mean Green makes some re-wound alternators that put out a lot of juice. But they are EXPENSIVE!

I've done research on the swap, but only for 4.0L TJ's... don't know about the 4cyl versions.

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Old 01-27-2010, 12:20 AM   #3
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Not to derail your thread but I'll give it a shot.

Why do you want a larger alternator? I too have looked at larger alternators (and besides Mean Green $400 there are one or two other options but similar prices for the same output.)

How many amps do you want, and how many do you think you need?

With a good battery and stock alternator you'll be able to recharge your battery after not too long. I ran dual deep cycle batteries for a long time and never had a problem charging them with the stock alternator.

Coming from someone who uses a winch, has eight 55watt lights on at times (2 headlight, 2fog light, 4 rock lights) and occasionally a 1000 watt RMS amp pounding toons in the back, I'd say I put the stock alternator to the test.

Just trying to save you a few bucks you may not need to spend. But if you are
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97 TJ 6cyl, 5speed 37" Krawlers on American Racing 17" wheels. (Beadlocks someday)
RE 5.5 Long arm, Currie 9" front and rear with ARB's, Warn hubs and axle shafts, CTM u-joints
Optima Dual Batteries, OR Fab roll cage, custom rock sliders, SMF shorty bumpers front and rear.
My Jeep Site: www.jeffsjeep.com
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Old 01-27-2010, 01:37 PM   #4
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Thanks Jeff. I wasn't sure I'd need a larger alternator. So far I've only added 5 Hella 500 FF's two with 55 watt bulbs 3 with 100 watt bulbs. I plan on adding a new stereo but nothing real high powered. Maybe a winch someday. I am planning on installing a Sears Platinum battery and then reassessing the need for an alternator.

I'd be interested in your dual battery installation (photos would be awesome).

Thanks again.
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Old 01-27-2010, 05:52 PM   #5
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Tell ya what. I'm not sure what the protocol is on this board for posting photos or links but I'll go out tonight and snap a bunch of photos of the current status of my rig, mods, etc. and put them on my website tonight. If you don't see what you're looking for in that set let me know and I'll take specific pictures for ya. Give me tonight to get the pix taken, cropped, etc. and uploaded to my site. I'll let you take a guess what the link is.
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97 TJ 6cyl, 5speed 37" Krawlers on American Racing 17" wheels. (Beadlocks someday)
RE 5.5 Long arm, Currie 9" front and rear with ARB's, Warn hubs and axle shafts, CTM u-joints
Optima Dual Batteries, OR Fab roll cage, custom rock sliders, SMF shorty bumpers front and rear.
My Jeep Site: www.jeffsjeep.com
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