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      11-14-2019, 05:41 AM   #18

Drives: 2018 M2
Join Date: Feb 2019
Location: Switzerland

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Originally Posted by FaRKle! View Post
Assuming the same spring rate as OE, lowering springs alone shouldn't shorten the life of dampers unless the piston is reaching the end of physical travel. If you look inside a damper it's just a piston head, piston, and cylinder filled with oil. It shouldn't be position sensitive unless, it's reaching the end of travel and impacting things, but your bump stops should prevent that.

Stiffer springs by their nature reduce the critical damping of the damper, and thus as the damper wears will feel underdamped sooner, but that has nothing to do with lowering.

Some of the F2x/F3x springs BMW offers (either OE on models or M-performance line) have virtually the same spring rate as the M2 springs, but are shorter by about an inch.

Back to the bump stop point, if you go lower you'll want to either get shorter bump stops or trim your existing ones to maintain similar damper travel without engaging them. When the bump stops are engaged they boost the spring rate, and in doing so can create more work for the damper along with making the ride worse depending on how hard they're engaged.
It would be interesting to find out in what way a shock like the Bilstein B8, made to be matched to lowering springs, differs from the B6 which is an OEM replacement.
2016 Grand Cherokee Ecodiesel - 2012 1M - 2003 E55 AMG - 2005 Nissan 350z 35th anniversary - 1998 BMW 530D - 2003 Alfa Romeo 147 GTA - 1992 Mercedes W124 500E - 1992 Ford Escort Cosworth - 1989 BMW E30 325IX - 1988 Peugeot 405 Mi16 - 1963 Chevy Impala SS 2dr hardtop