Spring rates - Ground control setup (archive)

I'll be getting a GC suspension soon and I know nothing about spring rates. The car is 98% street so I want relatively mild springs for normal duty with the option to swap out more aggressive springs for auto-x (a few times a year), and track schools (maybe once a year). Can someone post spring rate guidelines for street, auto-x and track school applications? A stiffness comparison of each to stock would also help greatly.

Vielen Dank!
~B
1989 E30 M3 "Wheezy"

Get ready for SIG Fest West in Northern CA - Details posted soon to www.bayareamotorsport.com !

Follow Ups:

I've 500 fr and 750 rr..stiff,but not bone jarring ROB89M3 22:59 5/19/2002 (0)
Another of Gustave's excellent articles. Lee 19:59 5/19/2002 (0)
running 400 frt/600 rear with camber/caster plates john///m3 18:46 5/19/2002 (0)
Try something... KevinS 17:32 5/19/2002 (0)
Hey B adamp 11:41 5/19/2002 (3)
- Do you know the stock spring rates by chance? B. Wheaton 12:34 5/19/2002 (2)
  - 100 front, 300 rear (from www.artglenn.com) John A 20:26 5/19/2002 (0)
  - I think fr 100-150 and rr 200-250 adamp 16:32 5/19/2002 (0)

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