Big 3 and AD244 Alternator Upgrade
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2004-2007 Cadillac CTS-V Performance Mods Discussion, Big 3 and AD244 Alternator Upgrade in Cadillac CTS-V Series Forum - 2004 - 2007; Just to let you know, I'm in the process of doing a Big 3 upgrade and a new alternator, and ...
  1. #1
    FuzzyLogic is offline Banned
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    Big 3 and AD244 Alternator Upgrade

    Just to let you know, I'm in the process of doing a Big 3 upgrade and a new alternator, and figured I'd list a couple of things that I found:

    - It's easy to find a remanufactured AD244 on eBay for about $80. Just make sure you get the correct bracket style. Compared to the stock alternator, which I believe is a 105 amp, CS130 or equivalent, the AD244 rated for 145 amps. While this may not sound like a whole lot of difference, the key is how much power those alternators can deliver at X RPM.



    Typically, the CS130 puts out 20 amps at 1000 alternator RPM (crank pulley = 5", alternator pulley = 2" --> 500 engine RPM = 1250 alternator RPM), 60 amps at about 1900 RPM, and doesn't reach its rated 105 amp output until much later--about 5000 RPM.



    By contrast, the AD244 is more like the CS144, but even better because it was designed to work with lower-RPM truck motors. Since I couldn't find a OEM AD244 curve, take this CS144 graph and mentally shift it down by 250 alternator RPM:



    - For wire, get stranded 1/0 copper welding wire. Skip the audio stuff-it's all cheap and overpriced. I recommend Royal Excelene 1/0, which you can buy from WireandSupply.com for $2.25 per foot (linkage here). This is what I'm using for cable lengths for the moment--to be safe, I purchased 10 feet of red cable and 5 feet of black cable. Probably overkill, but I'd rather be safe than sorry.



    - Stainless steel sleeving is optional, but adds mechanical protection and a certain cool factor. This thread identifies that 1/2" sleeving is appropriate for 1/0 cable. I wound up purchasing Flexo Stainless Steel XC from WireCare.com. Since it also provides good EMI protection, I may eventually use it on my spark plug wires.



    - The last, and hardest part (translation: I'm still trying to figure it out) is finding terminals for the battery and ground connections. I'd love to just throw up some Thomas & Betts silver plated, solid copper cable lug part numbers (MIL-STD stuff), but those are intended to make connections to busbar--not batteries and car bodies. I also need to find brackets. When I know more, I'll try to update this thread.
    J W and J W like this.

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  3. #2
    carlson_mn is offline Cadillac Owners Enthusiast
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    Re: Big 3 and AD244 Alternator Upgrade

    I thought I read that the stock alternator was 140amp. I will have to look into that some more though...

    Edit: What I saw is the unit on rockauto listed as OEM replacement and labeled as 150amp. Who knows for sure though...

    Okay... here's from the 04/05 service manual...


  4. #3
    FuzzyLogic is offline Banned
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    Re: Big 3 and AD244 Alternator Upgrade

    Quote Originally Posted by carlson_mn View Post
    I thought I read that the stock alternator was 140amp. I will have to look into that some more though...

    Edit: What I saw is the unit on rockauto listed as OEM replacement and labeled as 150amp. Who knows for sure though...
    Thanks for motivating me to find the exact part number. Our cars came with the AD230--105 amp unit.



    Seen pictured here:



    http://alternatorparts.com/ad230-ad2...ternators.html

    ----------

    Word to the wise: be leery of ucpautoproducts on eBay. They sold me a AD244 that was missing the rear bearing, and then when I complained, they sent me another AD244 that someone had apparently attempted to spray-paint. In both cases, I had to send them back.

    I may need to amend this post to say something like, "just buy an new, upgraded 200 amp AD244 for $140."

  5. #4
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    sssnake is offline Cadillac Owners Fanatic
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    Fuzzy,

    1/0 is probably overkill for the charge wire. 4 gauge is what I typically run. However, our charge wires are waaaay longer than most as they run around the backside of the block to get to the battery. Don't forget there is a 200 amp fusable link in the charge wire as well (probably because of the long run near the exhaust). If you are upgrading the alt for your stereo I would go a different route (and I have done alt upgrades a lot). our batteries are a POS. Way too small for larger aftermarket stereos/amps. The best mod for the electrical system is a battery relocate and size upgrade. I will likely go this route after the blower build is complete (which should be soon). Also, use of efficient amp topologies (class D, G, or H) is highly recommended as this will reduce weight and electrical requirements.

    BTW - the reason a battery upgrade is better than an alt upgrade is the alt can't keep up with transient power demands as well as a battery with low ESR. The alt only needs to be able to keep the battery charged. Once you get a bigger battery in place then I would consider a bigger alt.

    Another note: Wal-Mart now sells Kinetik batteries so the price has fallen substantially. They have to be ordered typically but they are or at least we're good batteries.

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    sssnake is offline Cadillac Owners Fanatic
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    I forgot to mention that you make excellent points on the current vs rpm. I'll be looking to install one of those alts after the battery relocate.

  7. #6
    rjoffe is online now Cadillac Owners Connoisseur
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    Re: Big 3 and AD244 Alternator Upgrade

    Fuzzy,

    The ends you want are from QuickCable. If you have a batteries-plus near you they may carry the ends, and also have a proper crimper to use. Bring your cables, buy the ends and they usually let you crimp them for free. If that falls through, but the proper ends online, try to find a forklift maintenance shop that handles electric forklifts, they may be able to help you out with a crimper loan.

    Ron

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    Andringa is offline Cadillac Owners Enthusiast
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    Re: Big 3 and AD244 Alternator Upgrade

    Fuzzy,

    I believe this guy figured it out, I think they sell them at Home Depot

    IMG_20130402_115545_zps62da7db9.jpg

  9. #8
    FuzzyLogic is offline Banned
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    Re: Big 3 and AD244 Alternator Upgrade

    Quote Originally Posted by rjoffe View Post
    Fuzzy,

    The ends you want are from QuickCable. If you have a batteries-plus near you they may carry the ends, and also have a proper crimper to use. Bring your cables, buy the ends and they usually let you crimp them for free. If that falls through, but the proper ends online, try to find a forklift maintenance shop that handles electric forklifts, they may be able to help you out with a crimper loan.

    Ron
    Rjoffe, QuickCable was an excellent suggestion. Thank you!

  10. #9
    AAIIIC's Avatar
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    Re: Big 3 and AD244 Alternator Upgrade

    Silly me didn't even look into all this when my alternator died last fall. My brief research found that the V's alternator part number was different than the other LS motors. I brought my dead alternator to a local repair shop that's been around for decades and the guy called me back and said he couldn't even get parts for it. I assumed that there was something structurally different with the alternator that made it V-specific, so I didn't look into it any further. I ended up just buying a new one from Luke - ah well. Next time I'll know better.
    '05 Stealth Grey CTS-V, Hyper Silver Linea Corse Venetos w/Continental ExtremeContact DWs (summer), black Team Dynamics ProRace 1.2 wheels with 275/35-18 R-compounds (track), Hyperblack Rota Torques (winter), KW Variant3s, V2 front brakes, Hotchkis rear sway bar, EPS cam, TEA-ported 243 heads, FAST92 intake w/LS2 TB, JBA Camaro/G8 1-3/4" shorty headers w/JBA cat pipes, Corsa exhaust, UUC motor and tranny mounts, UUC shifter, MAPerformance trailing arms, Specter cradle bushings, etc...

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    Re: Big 3 and AD244 Alternator Upgrade

    I think my next step will be an alternator. I did the big 3 upgrade. I added 2 gauge wire in addition to stock. Rerouted the alt charging wire forward, added two solid grounds engine to frame under car and added batt to stock ground.
    Recently I decided to pull the spare tire and add a dry cell battery to the spare tire well. Used a 200amp circuit breaker, 200amp relay and 0 gauge wire front to back.
    I'm really happy how it all turned out. So, after reading this post, I think next step will be the alt upgrade.
    Great info!
    Here are some pics from my project:
    image.jpg
    image.jpg

  12. #11
    AAIIIC's Avatar
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    Re: Big 3 and AD244 Alternator Upgrade

    Silly me figured the big 3 were heads, cam, intake. So what are the big 3?

  13. #12
    J W
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    Re: Big 3 and AD244 Alternator Upgrade

    A way to deliver more efficient power to upgraded stereo systems so as to not cause a huge drain on the electrical system and having the dimming lights effect. Something like that.
    http://www.the12volt.com/installbay/...TID~73496~PN~1

    ----------

    I would reather have a bolted connection in this situation as oppose to a plug in connection. Reason being is that a plug in connection is a snug fit but not a secue fit.
    Quote Originally Posted by Andringa View Post
    Fuzzy,

    I believe this guy figured it out, I think they sell them at Home Depot

    Attachment 106832

  14. #13
    ctsv247 is online now Cadillac Owners Enthusiast
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    Re: Big 3 and AD244 Alternator Upgrade

    This seems like a very worthwhile upgrade. Just wanted to check in and see how this has been working for you.

    Thanks

  15. #14
    ctsv247 is online now Cadillac Owners Enthusiast
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    Re: Big 3 and AD244 Alternator Upgrade

    Info over at ls1tech is hinting that the ad244 won't work on an ls6 car. Anyone able to verify or deny this?

    Thanks!

  16. #15
    ctsv247 is online now Cadillac Owners Enthusiast
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    Re: Big 3 and AD244 Alternator Upgrade

    Latest update...

    I emailed fuzzy about this and he confirmed what I should have already seen in this post. He's still working his way through a lengthy project and hasn't gotten around to making the alternator swap. In other words, it was never stated that this will definitely work on the V1 but as this alternator has been used on other LS series engines, he is hopeful that it should be any easy install.

    Thanks for the info fuzzy!

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