Nice find. Good to let others benefit from your knowledge. Most of us aren't on an unlimitted budget and every $ saved helps.

 

Later Delco style? You mean a CS series? Like this one?

 

Yes, the CS style. I had to change the pigtail but that gravy.

 

Is there a CS that's 145 amps? My CS144 is only 140, and it's the big alternator.

 

On ebay the is an after market alternator for Chevy. It is the AC delco design and has 200 amps. It doesn't have any warrant as far as I know but it's about 120 bucks. I have one on my s10 and it's been on there for almost 2 yrs now. It would take a little modification to fit it to a cummins but it's what I'm planing to use.

 

This is the one I got. Its a big M Fer

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemVersion&item=320959779000&view=all&tid=938704602011

 

Your link is too old.

 

Yea I run a 2000watt inverter off mine for work.

 

Drifter,
What gauge leads do you run your invertor with?
What connectors are used at Battery?
Also what MAX load have you run with it?

Terry

 

Great, a day late!!!!!! I just bought a replacement one 78 amps yesterday!!! I asked & searched on here and everybody just said get a 100amp but that wasn't enough info for a parts store to look up! Good info for others

 

Can you return it? 78 amps makes me think that you bought a delco 12si...which is a good alternator. There was a 95 amp version for the police package chevy caprice, if you'd like to go bigger. The case is not over taxed and parts for it are the cheapest on the market.

For anyone researching down the line, stay away from the delco CS-130 series, they are the junk. It was the successor to the si series, except it fell flat on it's face. 105 amps was the OE rating and the case size was the as si series which made them prone to cooking themselves and the pulley bearing failure from the belt loads.

On another note, CS series alternators where the first delco alternators with smart technology. They incorporated avalanche diodes and intelligent voltage regulators...

Pros: Alternator is more efficient since the field current was PWM at 400hz, which gave the alt soft start capability and reduced the parasitic hp loss. Has avalanche diodes.
Cons: The regulators have a thermal shutdown, which will shut off the alternator if it gets too hot inside (big issue with the CS-130's and cost GM becoup bucks). Also, avalanche diodes are a strange beast as they don't have the decade long life span of conventional rectifier diodes. The avalanche diode have a tendency of failing in the the reverse biased direction.

Like I said the CS-130 & CS-130D are junk...on the other hand CS-144 is a different animal. It is a really good alternator for the generation, delco addressed all the problems with the CS-130 in the CS144 package. If it wasn't peaky I'd be running one.

Some numbers to crunch, average speed ratio for an alternator is 2.8. So, 800 crankshaft rpm equates to about 2200rpm at the alternator shaft. If you look over alternator curves, you'll notice that the smaller case alternators require much higher rpm to deliver their rated power. Some of them don't reach rated output until 8k rpm. So having a 200-300 amp alternator is a waste unless you overdrive it or are bumping the idle everytime you have high load.

I chose a large stator alternator for my project because I have an electric winch and do not have the room to package a second battery. So for me, when it comes time to use the winch, I'm usually at 800-1000rpm engine rpm. If you look at the charts, I posted above you can see that the 22si larger case prevails over the CS-144 in delivering low rpm amperage.

 

6 gauge cable with the biggest connectors I could find, also have a 1000watt capacitor to help with the load. The battery is a 850 cca, I've ran all kinds of things but never really looked at the amp draw. If I was to guess it would be a oil less air compressor.
Oh also added a external bridge rectifier to help keep the alt cool.

 

Just to clarify, I may be wrong about the Delco model number & hell I may be wrong about the Ultima part number. What I did was ask to look at the paper catalog & found one I liked. Turns out, like I said, it fits a Kodiak but I dont remember what model. I did replace the big wire with a 4ga cable & ran a 10ga sensing wire up to the bulkhead on the firewall. I noticed a HUGE difference in the headlights and the stereo.