Installing G.M CS130 type 100 Amp alt ?

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Originally posted by tufftoys:
Im updateing the alternator to the G.M CS130 model single wire alternator. I need to know which of the old regulator wires i need to use.And which one,s i can discard. I have a '74 pantera VIN #THPNNDO6807. I have already bypassed the gen-light. And plan on putting a shunt across the ammeter gauge. Any advice would be welcome.. Thank,s

J.B.C

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OOOP,S It,s a '73 according to the factory.And a ,74 according to the dealer. Any way i guess it was a mistake to mention the word G.M. as my choice for my alternator upgrade. Soooooooo how about a ford alternator instead.. Any help out there?

I'm going through this myself right now. I was going to get a 1-wire alternator from one of the vendors, with the internal voltage regulator, but when I called PPC today they wanted $245, and my latest Hall catalog shows $170. So instead, I got the standard-wired 100amp alternator from PI Motorsports for $100. I figure I can add an external solid-state voltage regulator if I want, and still save money vs the other vendor options I found.

I bought the alternator from Hall several years ago and as I was getting ready to install it it rolled off the workbench and cracked the case rendering it useless, I took it to a local parts store one day and we matched it up. There were several ford alternators that matched, I believe a 92 Crown Vic and an early 90's Mustang. Unfortunately, I don't recall the specifics, but if you have a friend who has one, you could take it and have it matched up. I spent about $80 on it and have not had any trouble in a year and a half. Wish I could be more specific.

Good luck

Gary #06984

In 1988 I installed an alternator from a corvette. I believe it was an SI series. It is physicaly smaller than the original stock unit. You have to redrill the mounting hole to fit the 7/16" bolt and to keep things the same I also redrilled and tapped the adjuster hole to 3/8" NC. A 1" long spacer cut from an early smallblock alternator spacer from the junk yard takes care of the mounting. Once mounted, connect the main power wire to the large stud and run the blue wire that went to the original regulator to the terminal marked "I". This allows the indicator light to work and also allows charging to start without having to rev the engine up. Abandon the rest of the wires that go between the regulator and alternator. Oh, one more thing, the alternator comes with a pully for serpentine belt. Just swap your original pulley on, it is a direct fit.
Good luck as Jack says.

I used a GM Si12 alternator, 105 Amps, internal regulator, shrouded fan, and correct pulley for Pantera. It has larger bearings than the CS130. The CS130 has had problems with bearings failure (only 8mm dia.) and excessive heating, and has been replaced by a CS144.
The GM si12 is a good mechanical fit and the wiring is simple. The light on the dash still works properly as well. Two spacers are required 3/8" and 1" thick with a 3/8� hole. The adjustment bracket requires minor grinding for clearance on inside radius.
E-mail me if you want pics of installation.


[This message has been edited by Jon3613 (edited 05-13-2003).]