Quote:
Originally Posted by u/Josh
How does the changing roll centers when lowering the car play into this?
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Short answer: It doesn't play into front/rear frequencies and ideal desired front/rear wheel rates. It does affect the handling balance of the car, though. You *could* take the approach of "correcting" any unwanted effects from different changes in front vs. rear roll center heights by changing spring rates, but I'd be more inclined to try to fix the root cause of the problem (if it's really even a problem at all).
Outside of that, I would probably address it with changing front/rear roll stiffness with sways rather than go with what I consider wonky front/rear wheel rates.
I don't have specific knowledge of the effect of lowering the car on front and rear roll centers. I might assume that the rear roll center would be affected more than front, but that would make the rear effectively *softer*, which would imply you'd want *stiffer* rear springs to compensate. I could be off on that, though, so anybody with the geometry please share!
You also should consider that the suspension designers probably designed the suspension to be optimal for maximum handling performance at a ride height setting LOWER than stock. That's what I would have done...