Hi,
We found this on the web and thought it would be a good starting point.
http://www.bmw2002.com/documents/bmw-2002-suspension.pdf
We did feel it was too soft so increased it slightly. People out there are already racing these and would know more than us for a good set up.
The guy who built the engine and races in British GT felt we were going to soft with the spring rates but bowed to our suggestion.
As we haven't given the car a good test yet we may increase the spring rates later.

Cheers,
Bob.