How to select/compute spring rates for any car

[David Pozzi]

I'm starting this to get some tech discussion going on how to choose a good spring rate for a car.
It usually involves determining what frequency you want at the wheel, and calculating the spring rate that will provide it.



Here is a page on spring frequency and a spreadsheet to try out:
http://www.geocities.com/bry593/spri...teselector.htm

I'd appreciate any info on what frequency in cycles per second is desireable for:
1. mild street 1.25 cps?
2. high perf street 1.4 to 1.5 cps?
3. road course uses 1.6 to 1.7 cps?

I'd like to see some discussion on how to calculate the proper spring frequency/rate needed, and your comments on the above spreadsheet. Is it useful or even correct?
Thanks, David