Setup A-arm Analysis
No sooner do you create a suspension with the desired static parameters then you
have to take it to the track. As soon as the car comes off the track the race
engineer will want to change the suspension. He will seek more or less camber in
the middle of the turn - he doesn’t care about the static camber - he wants to
change the dynamic camber. Given the time pressure at the track he doesn’t have
time to fire up WinGeo3 and perform a complete analysis. He wants to know what
camber shims will give him the desired dynamic camber, and he wants the answer
NOW.
The Setup-A-arm program handles this task, and does it quickly. It begins with
the suspension created by WinGeo3 and permits the standard camber shim, caster
slug, antidive slug and ride height adjustments and displays the revised camber
and bump steer curves. And it does so with a simple, single-form program which
is designed to be used at the track under severe time pressure.
The Adjustments
Add camber shims of 0.313 inch or 5/16 of an inch. (All dimensions are shown in fractions of an inch as well as the decimal equivalent - no wasted time trying to find a 0.313-inch shim - go directly to 5/16.)
The Result - a Camber curve
The original camber curve in red gave -1.5 degrees at 2.5 inches of bump. With
the 5/16
camber shim the black line produces the desired -3 degrees of camber at 2.5
inches of bump.
