Originally Posted by leo95se
yes but the dampers are rated for 120(150?)lb springs. how can compression and bump compensate for a spring rate thats 400+lbs higher?
I believe the effective spring rate, at least in compression, is much higher because the F suspension is setup to run on the bump stops. Also, the F suspension has been preloaded to ~200 lbf (may have an effect on stiffness if the spring rate is progressive).
From my early discussions with Jay at GC it sounds like the EDC (non-ZCP) dampers can handle a F spring with a 400-440 lbf/in rate, as long as the car is not lowered by more than ~0.5" and upper mounts with increased suspension travel are used.