User 121020

I think any of the rates you have listed above would be OK. It's going to be a matter of what your driving style is like and how you like the chassis to ride. Any other modifications - anti-roll bars, non staggered wheels/tires, etc?

When you go too high with the spring rates, you'll start to feel a disconnect between the chassis and the contours in the road. My compression valving feels great with the springs I have. The rebound...not so much. As I go over undulations in the road, the low rebound damping allows the wheels to drop and support weight quickly, which gives the chassis a floating feeling. When it settles all is well and good, but there is an iffy transient that occurs over undulations. In auto-x or track lapping, they feel OK on smooth surfaces.

Revalving isn't too expensive, if you want to run higher rate springs. I had mine revalved for ~$60 a piece from a builder in North Carolina. Don't forget shipping costs when considering this... ~$50 each way. As I mentioned earlier, I would add about 150 lbs to the rebound curves (@ 3in/sec) for my dampers, if I were going to do it again. I opted to choose my own specs as a bit of a science project, but should have gone with something more along the lines of what the builder was suggesting. Live and learn...