I don't think that's what they're talking about. I'm on a DD2 and I can guarantee that I'm not clipping one bit. It happens on certain cars say on the back straight of VIR. The wheel will start a mini back and forth oscillation until it gets so quick it's a vibrate. I'm thinking it has to do with either something not jiving in the suspension layout (something loose?) or the FFB Tweaks in CSP. Haven't done more testing but it's happened in other cars too.
Will try testing with FFB Tweaks off tonight and if I have time, moving some suspension arms. Caster? Something in here might be doing it.
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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
In AC suspension editor:
Bumpsteer in function of alignment of the rods:
The goal is parallel movement of all rods, below how to solve:
How to align properly to prevent bumpsteer: