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      12-27-2012, 10:43 PM   #29
italyix's Avatar

Drives: '08 E90 M3
Join Date: Dec 2011
Location: Bay Area

iTrader: (5)

Originally Posted by M3SQRD View Post
If you list numbers then perhaps you should do the math correctly:
Wheel rate = spring rate * motion ratio^2 so for your example...
600*0.83^2 = 413 lbf/in

Good luck finding any reputable shop/vendor that builds/races e9x M3s that would recommend running F/R 500/1200 lbf/in spring rates with the rear spring in the stock location
Yeah ty, math was never my strong point. Im not saying to run 1200lb in the rear. If one plans to match the rear spring with the front, the equivalent oem location would require a 1200lb spring to match the front, hence why a rear coil over makes sense. Now, will the towers crack? Idk, but GTS runs a rear coil over.
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