Vibration/Rumble While Turning | FerrariChat

Vibration/Rumble While Turning

Discussion in '360/430' started by Builder360, Sep 29, 2013.

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  1. Builder360

    Builder360 Rookie

    Aug 25, 2013
    13
    Des Plaines, IL
    Full Name:
    Rick
    I have a 2000 360 F1 and while accelerating from a stop and making a turn, mostly Right, there is a vibration/rumble. When accelerating in a straight line it does not do this. Any ideas would be greatly appreciated.
     
  2. vincenzo

    vincenzo F1 Rookie

    Nov 2, 2003
    3,373
    Is a tire scrubbing while near or at full lock? If so, it is normal.
    Rgds,
    Vincenzo
     
  3. Builder360

    Builder360 Rookie

    Aug 25, 2013
    13
    Des Plaines, IL
    Full Name:
    Rick
    I checked the tires for rubbing and that's not it. It happens even when your not in a full radius turn. Thanks for the reply.
     
  4. TM328

    TM328 Karting

    Jul 26, 2004
    146
    New England
    May be a Wheel bearing.

    Turn hard left and listen, then right and listen. If it gets louder when you turn one way, it is the opposite side wheel bearing.
     
  5. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    39,169
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    Could be the limited slip is chattering slightly in turns. A very, very small amount of limited slip additive would cure that if it is the problem.
     
  6. vincenzo

    vincenzo F1 Rookie

    Nov 2, 2003
    3,373
    #6 vincenzo, Sep 29, 2013
    Last edited: Sep 30, 2013
    Not "rubbing" - but "scrubbing" - a technical term.

    It is not clear to me what you mean to convey with "not in a full radius turn". If you mean wide, rather than tight turn - scrubbing is likely not an issue (assuming your ride height and toe settings are at factory spec).

    See here for scrubbing info:
    Frictional Interaction of Tire and Pavement - Google Books


    Additionally;
    The front tires' toe settings go out of whack in a tight circle (Ackerman effect) and this causes a tire to slip sideways with slip/catch/slip/catch "chugging" motion that you may be referring to as a rumble. You will feel it most greatly in a parking lot with a thin bit of loose gravel, at slow speeds and very tight circle.

    Additionally,
    A limited slip will cause the same thing at the rear. Each of the two tires are travelling different distances in a tight turn. When one of them slips, it gives the same type of chugging describes above when on a loose surface.

    All the above issues are normal in the 360.

    Automotive Service: Inspection, Maintenance and Repair - Tim Gilles - Google Books

    Rgds,
    Vincenzo
     
  7. Builder360

    Builder360 Rookie

    Aug 25, 2013
    13
    Des Plaines, IL
    Full Name:
    Rick


    Got it, thank you! Good info, appreciate it. Very well could be the issue.
     

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