Bump Steer Elimination- Error in my ways.

[JGSturbo]

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.

[deaner]

That explains why my calculated (no CAD) pivot points where not right when it was mocked up with real parts.

[JD66]

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.