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Zr2USA = B_Rich
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2,657 Posts
Discussion Starter · #1 ·
Here is a little write up/explanation on how to swap your stock CS130D alternator for an AD244 alternator off of most of the full size trucks.

For those of you that NEED a bigger alternator, weather it be because of off-road accessories (winches, lights, etc) or because you need the extra amperage due to a bigger sound system, you would probably upgrade to an aftermarket alternator to meet your needs. Well, unless you are paying $300+ for a built alternator with a good stator and regulator put in, you will loose voltage at idle when you purchase the upgraded one. This is where most people have their concern, especially you off-road guys.

For example, when you put a 160 amp stator in a stock CS130D (4.3L) case, you will get the 160 amps, but only at about 1000 engine RPM's. Our 4.3L's idle at ~550-600, so the output is a lot less, voltage and amperage. I've found that my "built" CS130D only put out 45 amps and 12.8v at idle, when I needed a LOT more than that to keep my lights from dimming at idle.

So, our goal here is to get output (amperage and voltage) at idle as well as our required output at speeds greater than idle. With the AD244, you can have the best of both worlds.

*You can pick up a used AD244 alternator from your local junkyard for ~$40-$50, depending on mileage/condition*

The AD244 alternator came off of several full size pickups, from different years. There were two versions of the alternator made, a 130A version and a 145A version. You can call your local junkyard/salvage yard and ask them what it came off of, how many miles are on it, and what version it is (130A or 145A). Here is a link to everything you need to know (including what vehicles it came off of) about the AD244 (thank juddspaintballs for the link)

http://www.wai-wetherill.com/products/partimage.cfm?wai_num=1-2419-21DR

*The AD244 alternator will bolt right up to the stock alternator bracket on the 4.3L with NO modifications to the bracket. The only thing that is different is that you won't be using the 3rd bolt that is on the backside of the alternator. The CS130D has this, but the AD244 doesn't. You won't have any troubles with the bolt not being there.*

*The AD244 uses the same wire harness as the CS130D. It is a plug-and-play application.*

Now, I know what you guys are thinking..... "well dude, I need wayy more than 145 amps." That's what I was thinking too when I was doing this mod. I've got a decent sized sound system in the truck and some aftermarket fog lights on my safari bar, so I needed the extra amperage.

Bench tests have proven this alternator to put out 200+ amps at idle when cold. Yes, that's right, at idle.

When the alternator is warm it will easily put out 100 amps at idle,which is way better than the CS130D which is only capable of producing ~40 amps at idle.

It is a slightly underrated alternator (you audio guru's out there know what the term 'underrated' means and how it compares to the quality of a product). I can crank my system to the max and have no voltage issues with it when I'm at idle. I'll maintain a 14v and my lights don't dim.

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Now that you have the alternator, you'll be needing a longer belt. I can't say how long of a belt you'll be needing, but the stock one won't work. If you DO get the stock belt to work (some have) I STRONGLY don't recommend it. It will put a bigger strain on the bearings in the alternator and can cause premature failure. It's worth the extra $35 for a new belt.

*You will need a belt that is 1"-1.5" longer than stock. For some reason, the lengths of belts changed from year to year (even 98+) so you'll have to do a little bit of math and figure it out on your own :p *

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I also highly recommend doing the "Big 3" upgrade when doing the AD244 mod. Stock wiring CAN take the 200+amps that the AD244 puts out, but if you are having problems with it, then it is probably the wiring.

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Here are some pictures of my AD244 in action:

Output at idle with just my headlights on:




Output at IDLE with my system cranked to the max:




Output at IDLE with all accessories on (all 4 headlights [quad beam mod], a/c on MAX with fans at #3, fog lights, and my system cranked to the max:






13.96 can be lower than most would like to be.... but a stock CS130D would be gasping for air if I was treating it like that.

So, if I had things my way, every s10/blazer would have an AD244 as their alternator, even if they have a stock electrical system.
 

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My mirror hates my sub
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9,463 Posts
any idefa if this will work on 1st gens? i know they bolt in different locations but i have no idea, havnt looked into even swapping between 4.3s
 

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My mirror hates my sub
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9,463 Posts
hot damn!!!! this is exactly what my 91 blazer needs :-D especially with a winch and (hopefully) a shit ton of lights
 

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Those crazy ass dogs!!!
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6,429 Posts
Thank you very much for making this a sticky! I always suggest this alternator to people looking for a higher amperage one. I'd love to get one but just too many winter projects and too (two) many jobs! haha.
 

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Zr2USA = B_Rich
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2,657 Posts
Discussion Starter · #6 ·
Thank you very much for making this a sticky! I always suggest this alternator to people looking for a higher amperage one. I'd love to get one but just too many winter projects and too (two) many jobs! haha.
Thank orangesonoma, he's the one that stickied it. I just re-wrote things in a better format :tup:
 

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Those crazy ass dogs!!!
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6,429 Posts
Ah that bastard has heard enough of my gratitude toward what he does on this forum :cool: :rotf:

THANK YOU BRIAN
 

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Zr2USA = B_Rich
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2,657 Posts
Discussion Starter · #10 ·
You said this fits the 4.3L V6, is the alternator for the 2.2L different or will it bolt right up as well?
We are waiting on a reply for this answer. I can't tell you for sure. Ancona is thinking about trying the alternator out here soon. I'm sure he'll post some feedback if/when he does try it.

Sorry I don't have an answer for you.
 

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Registered
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Well, I guess a simple way to just cross check part numbers would be at a local auto parts computer, at least we could know if the I4 and V6 alternator part numbers are the same... I can take pics of mine if you think it will help.
 

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Zr2USA = B_Rich
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2,657 Posts
Discussion Starter · #12 ·
Well, I guess a simple way to just cross check part numbers would be at a local auto parts computer, at least we could know if the I4 and V6 alternator part numbers are the same... I can take pics of mine if you think it will help.
It's up to you. If the part numbers are the same, then the alternator bracket is the same obviously. I've heard that there are clearance issues when upgrading to the AD244 on the 2.2's, but not 100% sure. Like I said, I don't own one, so I don't know for sure.

If you'd like, jshelton441, you could do a little bit of research and post it back in this forum. The more info we have on this swap, the better.
 

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Mine Sweeper!
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6,512 Posts
I cannot confirm nor deny if they'll fit the 2.2, but here's the description of the 2.2 alternator off a 2001, and then the same off a 4.3 from 2001.
http://www.wai-wetherill.com/products/partimage.cfm?wai_num=1-2175-31DR-1

http://www.wai-wetherill.com/products/partimage.cfm?wai_num=1-2398-11DR

from what i can tell, they are the same casing but with the plug location at a different position. so maybe the ad244 would actually fit...
http://www.wai-wetherill.com/products/partimage.cfm?wai_num=1-2419-21DR
 

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Overhead Console Expert
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1,884 Posts
i also did this mod. got the alt from a group buy on Zr2USA.com
great mod...my lights no longer dim while idling.
 

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Registered
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44 Posts
I cannot confirm nor deny if they'll fit the 2.2, but here's the description of the 2.2 alternator off a 2001, and then the same off a 4.3 from 2001.
http://www.wai-wetherill.com/products/partimage.cfm?wai_num=1-2175-31DR-1

http://www.wai-wetherill.com/products/partimage.cfm?wai_num=1-2398-11DR

from what i can tell, they are the same casing but with the plug location at a different position. so maybe the ad244 would actually fit...
http://www.wai-wetherill.com/products/partimage.cfm?wai_num=1-2419-21DR
Yeah you can physically see it in relation to the bolt pattern of the case, its probably just the plug location being an issue. Once I get my freakin title to my truck, I am doing this upgrade and we will know for sure.
 

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bah humbug
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401 Posts
would you happen to know which models and model years had the 145 amp AD244 in them? I wouldn't mind doing this upgrade but was looking at getting a new alternator but need the model and year for the local store to find the alt.

thanks.
 

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Zr2USA = B_Rich
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2,657 Posts
Discussion Starter · #18 · (Edited)
would you happen to know which models and model years had the 145 amp AD244 in them? I wouldn't mind doing this upgrade but was looking at getting a new alternator but need the model and year for the local store to find the alt.

thanks.
I cannot confirm nor deny if they'll fit the 2.2, but here's the description of the 2.2 alternator off a 2001, and then the same off a 4.3 from 2001.
http://www.wai-wetherill.com/products/partimage.cfm?wai_num=1-2175-31DR-1

http://www.wai-wetherill.com/products/partimage.cfm?wai_num=1-2398-11DR

from what i can tell, they are the same casing but with the plug location at a different position. so maybe the ad244 would actually fit...
http://www.wai-wetherill.com/products/partimage.cfm?wai_num=1-2419-21DR


:twak: :p


edit: that link was also in the OP :tup:
 

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Its that dam ADD!
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4,742 Posts
great info, now I just need to figure out how to up the voltage on my "cop car" alt on my LT1
 
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