International Full Size Jeep Association
Home Forums Reader's Rigs Tech Library Trail Stories FSJ-List
International Full Size Jeep Association  

Go Back   International Full Size Jeep Association > Tire Kickin' > General FSJ Tech

Thread Tools Search this Thread Display Modes
Old 03-03-2018, 09:57 AM
yossarian19 yossarian19 is offline
258 I6
Join Date: Nov 13, 2016
Location: Grass Valley, CA
Posts: 402
Upgrade from Motorola alt (searched already)

I know this must have been gone over a bunch but I've googled to the point of nausea and haven't found what I'm looking for.

I have a 1975 Wag w/ 401 and the Motorola alternator.
I put EFI & electric fans on it, so the Motorola probably isn't going to cut it.

I'm not attached to 12SI, CS130 or CS144. I can wire whatever I need to and have already bypassed the Ammeter.

Which alternators will physically fit, with 90+ amps output?
Reply With Quote
Old 03-03-2018, 01:46 PM
PlasticBoob's Avatar
PlasticBoob PlasticBoob is offline
All Makes Combined
Join Date: Jun 30, 2003
Location: Long Beach, CA
Posts: 4,007
I'm not sure which, if any, alternators will physically fit in the stock location, but I went with the CS130 with the Bulltear mount. It mounts on the intake manifold, so the alternator sits higher.

The only issue I ran into was that I had to open up the bolt hole on the CS130.

Here's my notes:

CS-130 alternator pigtail: AC Delco part #: 8078, GM #: 12102921

CS-130 alternator from Autozone - Duralast Gold, #: 1352-5-11

Wiring: S-terminal - 12v switched wire from inside if possible. sense wire, senses voltage (red A)

L-terminal - 12v switched wire. (yellow B)

Belt: Napa XL 25 - 7435
1974 Cherokee S, fuel injected 401, Trans-am Red, Aussie locker 'out back'
Click for video
Reply With Quote
Old 03-07-2018, 08:29 AM
Woodchomper's Avatar
Woodchomper Woodchomper is offline
350 Buick
Join Date: Dec 17, 2002
Location: Saint Charles, Missouri
Posts: 923
The CS and SI alternators are a good choice for alternator conversions and the ones people use the most when upgrading. With that being said it would be cool if someone tried something different.

One of the members on this forum works for Denso. He told me about a guy in Cape Girardeau, MO that retrofits Denso alternators for hotrods. That got me thinking that anyone could probably do that if they had more info on Denso products such as given amp output by part number etc. Anyway, my buddy is getting me a catalog/parts list of Denso alternators. I'm curious if the Denso alternators have less of a HP load requirement than the Delco counterparts.

In the meantime check out this Powermaster modified Denso alternator:
1991 GW 401 /727TF/NP229 /4" Skyjacker /EBL TBI /CS-144
1981 J10 401 /727TF/NP208 /6" Superlift /CS-144
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
CS144 Upgrade: Rewire or not to Rewire The PIG Smith General FSJ Tech 6 09-04-2011 11:32 PM
TFI!!! HELP!!!!!!!!(Update!!) Its all about the Jeep General FSJ Tech 29 04-05-2011 03:39 PM
motorola alt upgrade Mike7009 General FSJ Tech 10 03-02-2011 07:46 AM
Timing problem after team rush upgrade ??? AllJackedUp General FSJ Tech 4 02-04-2009 02:37 PM
GM HEI vs. Motorcraft/Duraspark ignitions (very long) Sycho15 General FSJ Tech 11 09-06-2002 07:46 AM

All times are GMT -6. The time now is 10:11 PM.

Powered by vBulletin Version 3.5.4
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
corner corner