Upgrade to CS style alternator

ok guys so while my brain is effectivly working at this hour of the day i have been thinking about switching to a CS style alternator. Reason being is i am switching to am electric fan setup and my understanding is that the CS alternators put out more voltage at idle than the original SI alternators do. so my plan is to either swap in a CS130 or a CS144

for a note to others my research has led me to believe that you can use these vehicles for a cross reference:

1991 Corvette w/ 5.7 will generate the part number for the CS130 (105Amp)
Advanced: 91313
Autozone: DLG1351-6-11
1993 Cadillac Fleetwood Brougham RWD W/5.7 will generate the part # for the CS144 (140Amp)
Advanced: 91408
Autozone: DLG1400-6-4

Note: Those part #'s are for original Delco Remy alternators and are not Re manufactured.

Here are the adapter part #'s ( I will edit again once I figure out if we need the resistor kind)


Non-resistor adapters:

- AC Delco: 8077

- Haywire: 2110

- Painless Wiring: 30707



Resistor adapters:

- AC Delco: 8078




As far as the swap goes the alternator mounting tabs are already in the correct location and the housing should be properly clocked. Furthermore they sell an adapter to plug and play our SI harness to the CS plug. We will however need some clarification on which one. There are two adapters available(1 with a resistor and one without). It is my belief that we do not need the resistor harness as it is meant for older vehicles that used an idiot light to tell the alternator to generate (Someone please correct me here if i am wrong). The next step would be to use an impact wrench to remove the serpentine pulley and fan(only applicable if you are using a V-belt setup) and replace it with the fan and pulley off of your old alternator. The alternator will then bolt in to the factory brackets not sure if the top bolt is same thread. Plug the adapter harness in and replace/tension your belt. you should be good to go, however i would recommend upgrading the output wire significantly especially if you use the 140Amp version (we wouldn't want any electrical fires now would we).


so in a nut shell that should be the swap. this will be in progress very soon on my car and i wanted to share it with others. please people lets make any changes where need be. i will note my experiences once the swap is performed. hopefully we can sticky this in time and it will be available for all.

yeah i been trying to collaborate the best of the best and bring it to our forum so we wouldn't have to outsource our info haha

i have found a couple of CS-144 in the wreckers for $45-$65. Is it worth the gamble to get an alternator from the wrecker instead of the $165 new at a store?

pontiacgp said:

sonix said:

You are exactly right. I swapped to the CS144 on my 1982 Trans-am. I got the alternator, along with the plug from the wreckers ($50). I just spliced in the new plug. I also manually added in a resistor (can't remember how many ohms at the moment). You're right, it's due to the idiot light for charging - or in this cars case - the "choke light".

The CS-144 also came on Lumina vans in the early '90s, along with the V8 RWD platforms (Caprice, Roadmaster, etc). They are such that when swapped to a v-belt setup, and put into the standard v-belt location, they drop right in without issue.
Very nice having high output with factory reliability.

Click to expand...

you can get the adapter plug with the resistor at Napa for about $14

Click to expand...

right but do we need the resistor type or non resistor type?

also my local yard said i could pick up the cs-144 for $45 no problem and if it failed a bench test to keep bringing them back till i got a good one.