Originally Posted by
Ridgey
Go to coilover supplier and get helper springs, no need for poundage, as when car is on its wheels it is full compressed.
I work at Leda suspension and trust me there is a need for the correct poundage or they do not work correctly. Not arguing just telling you fact! Otherwise they would all be the same rate and thickness.
Whatever you choose to do make sure you reset your geometry. A 20lb 50mm helper will fully compress to about 13mm a 100mm 70 lb will be about 45mm or more from memory.