Aftermarket Harmonic Dampner for V1
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2004-2007 Cadillac CTS-V Performance Mods Discussion, Aftermarket Harmonic Dampner for V1 in Cadillac CTS-V Series Forum - 2004 - 2007; Gentlemen, My dampner has started wobbling, time to replace. I don't want to replace with the stock unit, which is ...
  1. #1
    HAMSTAR is offline Cadillac Owners Enthusiast
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    Aftermarket Harmonic Dampner for V1

    Gentlemen,

    My dampner has started wobbling, time to replace. I don't want to replace with the stock unit, which is doomed to failure on almost all LS motors (V1, C5, GTO, TBSS, etc.). However, the most frequently recommended aftermarket replacement, which is the ATI Super Dampner, costs $450. Mother of God.

    http://www.summitracing.com/parts/ATI-917266/

    Is there anything cheaper out there you guys can recommend that runs better than the stock dampner?

    For the installation, I know I'm going to need a new serpentine belt, and have decided to go with the Goodyear Gatorback:

    http://www.amazon.com/gp/product/B00...ls_o00_s00_i00

    I know I also need a crank bolt, and people have suggested the ARP because it's re-useable. Does anyone have a part number for it?

    Thanks!
    HAM

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  3. #2
    darkman's Avatar
    darkman is offline Cadillac Owners Master
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    Re: Aftermarket Harmonic Dampner for V1

    Arp 234-2503

  4. #3
    HAMSTAR is offline Cadillac Owners Enthusiast
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    Re: Aftermarket Harmonic Dampner for V1

    Quote Originally Posted by darkman View Post
    Arp 234-2503
    Thanks, buddy, you come through again. Would you go with the ATI Super Dampner?

  5. #4
    darkman's Avatar
    darkman is offline Cadillac Owners Master
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    Re: Aftermarket Harmonic Dampner for V1

    Quote Originally Posted by HAMSTAR View Post
    Thanks, buddy, you come through again. Would you go with the ATI Super Dampner?
    Yes.

    You may want to verify the ATI part number. I say that because I tried to check it against Rock Auto's listings. Specifically, the Summit listing shows that it will fit the Corvettee (1997-2004), but does not list a CTS-V. Rock Auto shows a harmonic balancer for the LS6 CTS-V, which it shows also will also fit the 1997-2004 Corvette. However, Rock Auto shows no harmonic balancer listing for the 2006-2007 LS2 CTS-V. Bottom line is that I was unable to verify that the Summit ATI unit will fit the CTS-V LS2. Perhaps some other folks have already verified this.

  6. #5
    HAMSTAR is offline Cadillac Owners Enthusiast
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    Re: Aftermarket Harmonic Dampner for V1

    Thanks, I just confirmed the part number with ATI.

  7. #6
    lollygagger8's Avatar
    lollygagger8 is offline Cadillac Owners Connoisseur
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    Re: Aftermarket Harmonic Dampner for V1

    Why not go with an underdrive pulley instead? Since you are replacing it anyways, why not get a little power out of it?

    http://sdparts.com/details/powerbond...s/kpbu1117ss25

  8. #7
    stepchild21's Avatar
    stepchild21 is offline Cadillac Owners Fanatic
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    Hey that powerbond kit for 219$ anyone try it out before ??? Because that seems like an awesome price for the amount you get

  9. #8
    HAMSTAR is offline Cadillac Owners Enthusiast
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    Re: Aftermarket Harmonic Dampner for V1

    Decided to go with the ATI, no underdrive. I want this part to work and I don't want to think about it again for the next ten years or so.

  10. #9
    FuzzyLogic is offline Banned
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    Re: Aftermarket Harmonic Dampner for V1

    Quote Originally Posted by HAMSTAR View Post
    Decided to go with the ATI, no underdrive. I want this part to work and I don't want to think about it again for the next ten years or so.
    I think you made the right decision. If you ever decide to go with a supercharger, you'll want to pin the crank while you're down there. Btw, what color is your CTS-V interior? There's a set of black seats on eBay for pickup only--going for $155 right now.

  11. #10
    HAMSTAR is offline Cadillac Owners Enthusiast
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    Re: Aftermarket Harmonic Dampner for V1

    Good to hear you approve, really. My interior is gray, but I'm gonna swap out for black some day... some day when I'm not blowin cash fixing GMs mistakes.

  12. #11
    HAMSTAR is offline Cadillac Owners Enthusiast
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    Re: Aftermarket Harmonic Dampner for V1

    I have to give a shout-out to Summit. Not sure if they are sponsors or not and if this is against the rules-- if so, sorry. But I just have to say that they worked super hard to get this part to me, and it just arrived today. Initially, they tried to do a drop pick up, so I could pick up the part from ATI, which is based in my town, Baltimore. That way I could get summit pricing and not pay any shipping. Then when it looked like ATI wouldn't fab it in time for a weekend install, which became clear at 2.50pm on Saturday, they overnighted the part to me from their stock for what I thought was a very low overnight fee. Not only that, but they called me several times to confirm that everything was going smoothly. All in all, my "bright idea" to do a drop pick up from ATI probably cost them a couple hours in man time, and they were apologizing to me the whole time. Amazing.

    The ATI damper is is sitting here in front of me now. Artie from Summit, you are the man.

  13. #12
    sssnake's Avatar
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    Re: Aftermarket Harmonic Dampner for V1

    Do you have any feedback after the install? I'm still having a hard time swallowing the price.

  14. #13
    HAMSTAR is offline Cadillac Owners Enthusiast
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    Re: Aftermarket Harmonic Dampner for V1

    Well, my tuner Jeff Lowry at PSI in Maryland, whom I trust, is of the opinion that it's overkill unless you're running high RPM, high HP (like 700 at the crank), turbo, etc. He likes em and runs em on his cars, but only the high HP ones. For smallblock N/A cars, he goes with an underdrive pulley.

    That said, I like knowing that I will never have to worry about my pulley again.

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