I am curious as to how different spring rates affect a drag car. Also, what would be the difference in a linear spring rate and a progressive spring rate for a drag car?

Basically, I need to get more traction with my b20vtec hatch. Currently ive got kyb agx 4ways, z10 radius rods, and some crappy no-name brand coilovers. Im thinking that i could greatly benifit from a nicer/stiffer set of springs. But im not real sure how spring rate affects my car when it is launching, and traveling down the strip. A couple of my friends have told me that the springs have very little to do with your straight line traction. But it seems to me like with some stiffer springs, atleast in the rear, that it would help the weight of my car stay more on the front wheels.

Also, from what i can gather, the better style of spring to have for drag racing would be a linear spring, is this the case?

Can anyone shed some light on the subject as to how these things will affect my car as far as traction goes?

Thanks for any comments

ERIK