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Thread: '18 Spec Miata Cahmpionship

  1. #1

    '18 Spec Miata Championship


  2. #2
    Senior Member Carroll Shelby RichardP's Avatar
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    Three of the top four finishers end in DQ. I haven't heard any reasons why...


    Richard P.

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    Senior Member Grass-Passer
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    Wow! Diff builders too
    Tyler Gardner
    CMC #13 2015-2017
    SM #013 2018
    www.dfwmustangs.net

  4. #4
    Senior Member Carroll Shelby
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    "It's all ball bearings these days"
    Bryan Leinart
    CMC #24

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    Senior Member Grass-Passer
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    Quote Originally Posted by RichardP View Post
    Three of the top four finishers end in DQ. I haven't heard any reasons why...


    Richard P.
    Here is the summary:

    https://nasaspeed.news/misc/summary-...hampionships/#

    And here is Jim Drago's (a top builder) explanation:

    https://mazdaracers.com/topic/6956-n...read/?p=110151
    -Wayne
    -CMC #85

  6. #6
    Senior Member Carroll Shelby
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    https://nasaspeed.news/misc/summary-...hampionships/#

    But of course there is more to the story if you talk to a miata guy.
    Bryan Leinart
    CMC #24

  7. #7
    Senior Member Carroll Shelby ShadowBolt's Avatar
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    Quote Originally Posted by RichardP View Post
    Three of the top four finishers end in DQ. I haven't heard any reasons why...


    Richard P.
    I was ask to evaluate some parts that were suspected to have been modified. They sent them to Mazda instead. I'm glad I was out of it.


    JJ

  8. #8
    Senior Member Carroll Shelby Fbody383's Avatar
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    We rebuilt the rear axles in my M3 - probably had right at 300,000 miles on it at the time. It was either $200 for the rebuild kits or $1200 for replacements.

    You could tell there was some wear on the cages and bearings, which there should have been at that point, but nothing that looked or felt worn.

    Based on that experience, I would say the only reason the cages may get modified at all is to make the reassembly, especially on the blind, or closed axle stub end, easier.

    My early thought is the rule was exploited though I'm not convinced it created an advantage, but my experience is no wear would open up the cage enough for a bearing to pass through. To be fair, the Miata joint could be a different enough design.

    And I can't imagine having to drag a tub onto the open trailer to get the race car home.
    #39 CMC Camaro
    Orange is Fast!
    CMC-NT01 FTW!

  9. #9
    Senior Member Carroll Shelby AllZWay's Avatar
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    Anyone know if this was a true competitive advantage over stock parts or just simply not stock parts?

  10. #10
    Wow...All the issues with the dyno sound pretty good right about now.

    On the mazda racers forum someone referenced an SAE paper that measured efficiency of these types of ball joints at 99.5% at 5 degrees angle. Not sure how much angle an SM puts on these but in any case it aint much.
    Al Fernandez
    CMC National Director

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