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Increased Body Roll After Air Suspension Adjustment?

Discussion in 'Model S: Driving Dynamics' started by Rockster, Apr 26, 2016.

  1. Rockster

    Rockster Active Member

    Joined:
    Oct 22, 2013
    Messages:
    1,005
    Location:
    McKinney, TX
    A couple of weeks ago our MS received its annual service. As part of the service, the car was aligned, the two rear tires were replaced (with the same factory OEM 19" MXM4's), and the SC performed a "ride height calibration."

    Upon driving the car afterwards we detected a very noticeable increase in body roll, especially at highway speeds. It felt like the suspension was on its highest setting all the time. We, of course, checked this and the display reports that the suspension is lowering and raising correctly with a change in speed. We rebooted the car in case the problem was correctable that way but saw no change. We've verified that the air pressure is the same as we normally keep it (right at 45).

    We thought that perhaps the new rear tires were the culprit and they would settle down in a couple hundred miles. No. It's been a few weeks and the body roll is still unchanged. We're pretty certain it's not our imagination because we've done controlled tests where we drove on known sections of road, at the same speed as before, and noted a the increased squishiness in handling.

    Before I contacted the service center and asked about it, I wanted to bounce this off of the collective. Has anyone experienced similar behavior with their air suspension? Any ideas what might be going on?
     
  2. scottm

    scottm Active Member

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    Jun 13, 2014
    Messages:
    1,262
    Location:
    Canada
    You were probably experiencing lower than normal ride heights and got used to it. It wore the tires down, sort of "as expected" it would.
    They fixed the height to be what it should have been all along. And you got new tires because of the abnormal wear - probably on the inner edges.

    So you're probably experiencing normal now, and feel it "tippy". Although, it is has got to be the most solidly planted car I've every experienced.

    If you had pictures of the side of the car "before" you might notice less room between the top of wheel and arch in the fenders, than you have now. For the same height setting.

    You could buy lowering links and dial down the height again, and get that lower look and feeling back. You will have to deal with tire replacements on your own then...
     
  3. Rockster

    Rockster Active Member

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    Oct 22, 2013
    Messages:
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    Location:
    McKinney, TX
    Thanks for the suggestion. I'll see if I can dig up some pics from the side for comparison.
     

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