Could you weight one before you put them on the car? How did you decide what rate to choose?
I weighed one on a car scale - 10 lbs! I'm gonna weigh them on a more accurate scale soon to see if thats correct
I choose the rate based on my previous experience with spring rates:
8kg (448lbs)on the front and 6kg(338lbs) on the rear - Max I'll ever go on the street again - not so great on the lower spine but awesome on the track - little to no body roll
6kg(338lbs) front and 4kg(224lbs) on the rear - tolerable on the street (barely bearable for the wife) - still great on the track - little body roll
now these were on a car 800-900 lbs less than my big old bbody
so I figure that with a 5kg (270lbs) front I figure a good match would be a 3.5kg (200lbs) rear in a heavier car should still have the firm feeling and roll I want but not so harsh of a ride that the wife would want to stay in the passenger seat!
This is all speculative right now - I'll see how well its put into action this summer - I also based this on the hotchkis setup for the ebodies which are running a 4kg(225lbs) front and a 3kg(160lbs) rear and they are anywhere from 600-800lbs lighter than the bbodies...
