Sorry to jump in here but I seek to know the same information.
What front spring size to use with coilovers? Here is my spring. 8 inches long, 2.5 I.D., rate 250, wire diameter .423, # of coils 7. Name: Eibach Springs 33/69 0800.250.0275
Drove the car with this spring in a couple of times. It didn't bottom soft but the whole front end was out of whack so it was hard to tell.
Maybe someone answer this question for both of us? Thanks!