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    Bump Steer

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    Fixerdude

    Posts : 68
    Join date : 2010-02-14
    Location : Lisbon Maine

    Bump Steer

    Post by Fixerdude on Tue Jan 31, 2012 8:26 am

    Can anyone provide a brief description of bump steer and how it works. Been racing 3yrs now, and still don't really understand this. I suscribe to 2 r/c mags, and even their explanations are confusing. Thanks.
    avatar
    teamflash44

    Posts : 183
    Join date : 2011-09-22
    Age : 46
    Location : Windham, Maine

    Re: Bump Steer

    Post by teamflash44 on Tue Jan 31, 2012 9:01 am

    Bump steer is a relatively complex steering geometry component. However, the simple description for it is ... the relationship of the steering links (tie-rods, spindle, other steering arms and linkage)length in comparison to the length of the suspension arms as it goes through it's range of motion. The steering linkage is typically longer then the suspension arms causing the arc of rotation to be longer. If the steering arm length and suspension arm length is the same, the toe-in/toe-out will remain the same through the range of motion. If they are different, the toe-in/toe-out will change. Typically the problem is during turning when one side of the vehicle is in compression and the other side is in rebound (vehicle is leaning toward the outside of the turn)and it throws your toe-in/toe-out way off your preset. If it toes-in, the vehicle will typically turn quicker on entry and get loose, if it toes-out, then it usually pushes on entry and exit. Zero bump steer would be ideal but typically unattainable. You want to reduce it as much as possible and make it a non driving issue. Remove the shocks from the vehicle, support the chassis from underneath, measure the toe as you move the suspension through its range of motion (both compression and rebound from static ride height).

    Hope that helps!
    avatar
    Lennydude

    Posts : 104
    Join date : 2009-07-19
    Location : Westbrook, Maine

    Re: Bump Steer

    Post by Lennydude on Tue Jan 31, 2012 11:16 am

    Excellent explanation Smile

    Fixerdude

    Posts : 68
    Join date : 2010-02-14
    Location : Lisbon Maine

    Re: Bump Steer

    Post by Fixerdude on Tue Jan 31, 2012 12:43 pm

    Thank You. That was an excellent explanation! Thinking about getting a track pass at Maximus so I have somewhere to try different setting like bump steer! Thanks Again.
    avatar
    teamflash44

    Posts : 183
    Join date : 2011-09-22
    Age : 46
    Location : Windham, Maine

    Re: Bump Steer

    Post by teamflash44 on Tue Jan 31, 2012 4:53 pm

    Your welcome. If I can help, post your questions and I'll try to help the best I can.

    Todd

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    Re: Bump Steer

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