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      10-29-2012, 10:16 AM   #83
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Drives: E92 M3s, R56 Cooper S
Join Date: Jun 2009
Location: EC

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Originally Posted by leo95se View Post
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.
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