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      11-14-2019, 02:05 PM   #36
atr_hugo
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Drives: '13 135i
Join Date: Jun 2007
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Significantly increasing the spring rate (and upping the 'natural frequency') of the vehicle can put the SAs into 'perma-soft' mode. They're made to be stiff for a natural frequency of around 1 hz, softening up as the frequency rises (small, sharp impacts). IIRC, the M-Sport suspension of the 135s are around 1.25 to 1.5 hz.
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