JonB wrote:Here are the results from the laser alignment check.
What is a bit bothering is that values that are not adjustable (e.g. camber) have varied between the "before" and the "after", suggesting that the car was not loaded the same before and after, hence voiding the comparison.
As for the toe-in settings, I'm not sure of the optimal or preferred settings for a Plus2, but the sheet shows a significant reduction after adjustment (0.13? instead of ~0.45?)... on a 2 seater I usually stay at the top of the window (~0.25? per front wheel, 3/32" each side).
The non null thrust angle (should be 0.00?) and dissymmetry of the rear end may push you to investigate what is causing it (A-arm, chassis etc...) : it may be one of the causes of the observed instability when entering/exiting a curve (rolling=loading or unloading a rear wheel with dissymmetry and non null thrust).
JonB wrote:@nmaudit, thanks for the diagrams. I don't think anyone is suggesting I am experiencing "rear bump steer", and I do not see how it is possible with fixed suspension mounts and new bushes (there may be some bush flex but I seriously doubt it is enough to influence the steering. However you must be aware that these cars are sensitive to rear toe in angles, and as we can see, mine is out of kilter.
possibly not in this thread, but my comment was mostly discussing to the other thread cited in reference just before my reply and from which I have taken an excerpt that clearly pushes that hypothesis, which I refute.