Discussion in 'Race 400/430/455' started by Daves 71 GS, Nov 19, 2023.

  1. Daves 71 GS

    Daves 71 GS Well-Known Member

    ATI now has a double key way thicker hub for your ATI damper.It requires a different seal which the number is provided,a small amount of machining to your front cover(enlarging seal register a small amount for new seal).Also John Everett has 4 hubs he had made with the same dimensions if anyone is interested.
  2. mbusher83

    mbusher83 Well-Known Member

    About time, when I made mine 2-3 years ago ATI was of no help after I split 3 of their hubs. What is the part number for the seal? Curious if it’s the same one I used.
  3. hugger

    hugger Well-Known Member

    Did they still make it a ridiculous tight press?
  4. Bens99gtp

    Bens99gtp Well-Known Member

    They are the same way on bbc too......freaking crazy
  5. Daves 71 GS

    Daves 71 GS Well-Known Member

    Yes Mark it is the same seal you used.I went straight to JC who owns ATI and he wasn’t happy about the way things were previously handled by the sales/tech dept.
    As far as the fit.there is a spec for the press fit and we have to hone the balancer to that spec.It is actually pretty easy to do.
    mbusher83 likes this.
  6. cjeboyle

    cjeboyle Gold Level Contributor

    I feel better now knowing it wasn’t just my balancer that was ridiculously tight going on.
  7. hugger

    hugger Well-Known Member

    Yea it's common knowledge that they need to be honed...which I guess there being variances in crank snouts it's good you have that ability to adjust fitment..but for a slip fit application like the Buick they should open them up a little imo

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