eca117

a buddy of mine has a 01 cherokee an i have a 90 cherokee will the alternator fit in my 90

jakbob

I believe 90 is renix so if it is, no. Alternators on renix are internally regulated. Alternators on HOs are externally regulated by the pcm.

5-90

Will it fit? Probably.

Is it a direct swap? No.

This has been done to death (by me!) on a number of boards.

The XJ used the following alternators on the gasoline engines:

1984-1986 got the Delco 12SI
1987-1990 got the Delco CS130
1991-2001 got the Nippondenso.

The two Delcos are internally regulated, while the Nippondenso is externally-regulated (the 1991-up regulator circuit is in the PCM.)

If you're going to put the Nippondenso in a RENIX, you're going to need to add a voltage regulator as well.

However, I've found that the Delco is usually more durable than the Nippondenso, and it's easier to upgrade. If you want more power, go to a local shop and get your Delco upwound instead - you'll be happier.

eca117

thank you for all ur help

hankthetank

Great info!

jakbob

5-90 is a legend... actually im going to pm you 5-90

5-90

Thank you - and "asked & answered." You should see your reply shortly.

SuperGlue

I have a stock 89 renix alt, so from what I just read it would be a delco cs130. I believe its a 60 amp alt. How wound up can I take it? What is going to burn out first from running higher amps? Say I can go to 130-140 amps, optimally, what size cable should I run and which ones need to be upgraded?

5-90

The lowest CS130 used on RENIX was 61A - the 80A unit was fairly common.

A local shop should be able to upwind that to the neighbourhood of 130-140A for about a buck an amp - if you can't find a shop locally, go to my site and click the San Jose Generator link (you'll be dealing with Rod directly.)

If the shop is worth a damn, the upwound unit will have comparable life to the OEM part. Also, if you have extra capacity that you don't use, you'll probably note an increase in service life (if you constantly use, say, 60A - 60/80A is a smaller fraction of peak than 60/140A - which means you're not pushing your parts anywhere near as hard.)

4AWG up through 150A, 1AWG for 151-250A. I know that Rush Power Systems is pushing 300A awfully hard - for that, I'd suggest 0AWG or 00AWG wiring (you need the safety margin that the larger wire provides.)