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Installed a CS-144

silvernblack

Member
Joined
Nov 22, 2003
Messages
5
Location
ca
Picked up a CS-144 alternator, AC Delco part number 321-1144, at the local boneyard. It came off a 99 Lumina VIN "K". It's one of those goofy ones with a big third "ear" ....so I lopped off that ear. I got it tested at Kragen and it was all good! Not bad for 20 bucks.

I replaced the serpentine pulley with my v-belt pulley and bolted it in place of my 94 amp 12si. Lined right up. I did have to use a different bolt on the upper adjustable arm; I inserted a piece of 3/8" tubing(as a spacer) in the case hole and snugged it all down.

I went to NAPA and bought a 12si-to-CS144 pigtail adapter (Part number Echlin EC82) and a slightly longer belt. That cost me 36 bucks....well, that's now more than the alternator...oh well.

Today I hooked it all up and it works just great. With the A/C on, brights on, fuel injection, electric fuel pump, and everything else I could turn on(brake lights, blinkers, radio, etc) the lowest voltage at idle was always >13.75 volts at the battery terminals.
 

KANE

Moderator
Joined
Mar 2, 2002
Messages
3,244
Location
KY
Corvette
Dark Blue 1982 Trans Am(s): Polo Green 1995 MN6
Picked up a CS-144 alternator, AC Delco part number 321-1144, at the local boneyard. It came off a 99 Lumina VIN "K". It's one of those goofy ones with a big third "ear" ....so I lopped off that ear. I got it tested at Kragen and it was all good! Not bad for 20 bucks.

I replaced the serpentine pulley with my v-belt pulley and bolted it in place of my 94 amp 12si. Lined right up. I did have to use a different bolt on the upper adjustable arm; I inserted a piece of 3/8" tubing(as a spacer) in the case hole and snugged it all down.

I went to NAPA and bought a 12si-to-CS144 pigtail adapter (Part number Echlin EC82) and a slightly longer belt. That cost me 36 bucks....well, that's now more than the alternator...oh well.

Today I hooked it all up and it works just great. With the A/C on, brights on, fuel injection, electric fuel pump, and everything else I could turn on(brake lights, blinkers, radio, etc) the lowest voltage at idle was always >13.75 volts at the battery terminals.

Good job!!

I found that the alternator off of a TPI Vette from 86-91 will work just fine with the pulley swapped-
ALT-1086.jpg

The housing is at the same 12 and 6 position as the C3 alternators. You'll need a new pigtail- but man, 108 amps are great!
 

silvernblack

Member
Joined
Nov 22, 2003
Messages
5
Location
ca
I'm thinking these goofy 3 eared alternators might be...

the hot ticket. According to the napa website they put out 150 amps and they're CS-144's. They also bolt right up and they're on bunches of cars...and they look ok once you lop off the goofy third ear.

Enter this part number in the NAPA website (non NAPA part number) and you can read about them and see a picture of them: 321-1144

http://www.napaonline.com/MasterPages/NOLMaster.aspx?PageId=100

In the AC Delco website below you can see what vehicles these units came on. Lots of cars too!

http://198.208.187.182/internet/VehiclePartFits.jsp?autosel=A&part=321-1144
 

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