Help With Coil-over Spring Rates

[DLinson]

I’m getting ready to purchase my shocks and springs and I need to pick out my spring rates. Would any of you have a suggested wheel rate I should shoot for?

I am shooting for a curb weight of 3000lbs for the Nova with a 55% front bias. That’s about 825lbs per front wheel and about 675lbs per rear wheel. I’m also going to be using the QA1 single adjustable shock DR8855B on all four corners.



For the front suspension geometry, the distance from the lower inner pivot to the coil over shock lower mount is 12.38 inches. The distance from the lower inner pivot to center of the wheel will be about 19 inches. The front shocks lean in at about a 15 degree angle.

The rear suspension is just a solid axle with a custom designed 4-link. The rear coil-overs are only angled in about 2 degrees.

I’m looking for a suggestion for both the front and rear spring rates. I will be driving the car quite a bit even on some longer road trips. I’m not sure if I’ll be hitting many track events, the wife might have issues with that. Thanks for any advise you guys may have.


Thanks.
Dennis