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When it should be suspension related it doesn't relate to caster /kpi in this case. When caster is a cause then a) there's barely none (shopping cart, causing wheels to turn immediately when force is applied) or b) there's way too much, resulting in very heavy steering.
Bumpsteer isn't the case either, as the steering rods are properly postioned, (length and angle) thus preventing jacking forces
What could be the case is the length of the upper control arm being a tad too short, resulting in too much camber gain. I modelled the supsension of it's real life counter part, but a few mm off can already result in a big difference.
However, I'm on a SC2 wheel, I didn't witness any osscilations this far, I will have a try at VIR tonight...
904 suspension, front is derived from the Porsche 804 Formula one car
As you can see, the upper A -arms are pretty short compared to the lower trailing arm. The effect of this can be a lot of camber gain, resulting also in some toe-gain, maybe giving the oscillations
View attachment 1085835
In AC suspension editor:
View attachment 1085837
Bumpsteer in function of alignment of the rods:
The goal is parallel movement of all rods, below how to solve:
View attachment 1085838
How to align properly to prevent bumpsteer:
View attachment 1085839
"The delicate hand of Herr M. Maus." I wrote that caption in CAR and DRIVER in 1964.
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