Originally Posted by south1716
Thanks you. It's a start but not fully answering my questions:
What is the impact of moving to a different curve but having the same stiffness?
What is the impact of changing arrangement but having the same stiffness?
If I understand your question correctly the answer is there is no difference. If you move the damper out for example this will of course increase the damping due to mechanical leverage. Moving the SRS/RHS inwards to give the same stiffness will do just that. There will simply be more damping.
Changing arrangement merely moves the SRS 4mm in or out, no effect other than that. You need this adjustment to maintain the desired spring stiffness for very large or very small damper settings.
One thing though, if the shock is moved it takes the spring with it. So the Spring Rate Screw needs to be moved to compensate but it presses on a different part along the spring length creating a slightly different leverage point but the same static stiffness. So its possible there can be a different feel on the track. I think it negligible, just my opinion.
I think reaching the same stiffness with the hard vs soft springs does subtly change the car however, they're not quite the same feel.
I also agree exactly with everything Jake said.