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    Bump Steer Elimination- Error in my ways.
    #1
    Bend-Tech Dragon Master
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    Nov 2009
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    Coos Bay, 10 miles from the OREGON DUNES!
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    2,154
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    I thought it was so simple, I was just a little bit WRONG.

    Here's how we normally talk about seeing zero bs.
    The error? The drawing is xy is parallel to the bulk head/suspension pivot.
    But in the total xyz the suspension has 10degs of rake.
    Added circles to the spuds and found -0.340 toe change
    To fix- rotated the bump and droop spindles (on their kingpin axis) to zero toe and re-plotted my inner tie rod location...

    A very note worthy change Basically the rake/caster/camber/kpi skewed in to BS.
    JGSFAB- CNC'n everything I can. What to see more?
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    Re: Bump Steer Elimination- Error in my ways.
    #2
    Senior Member deaner's Avatar
    Join Date
    Sep 2011
    Location
    Northern Ohio
    Posts
    546
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    That explains why my calculated (no CAD) pivot points where not right when it was mocked up with real parts.
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    Re: Bump Steer Elimination- Error in my ways.
    #3
    Senior Member JD66's Avatar
    Join Date
    Jan 2013
    Location
    San Diego, CA
    Posts
    693
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    I've always figured out bumpsteer in 3D - point the wheel straight at bump, ride height, droop and create points for the steering tab at each of those 3 locations. Create a plane and sketch a circle that uses the 3 steering tab points on the OD of the circle and the center of the circle is where the inner tie rods need to pivot.
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