D2 Coilovers

Originally Posted by MaysEffect

Are you guessing or do you know forsure these factors are different? All of those factors come into play to create the spring rate. So more times than not the dimensions are extremely close for any given diameter and length per rate measured. In the case where materials are different, the force acting upon it should be linear in both rebound and compression, if not, this goes back to what i said about damaged. Noticing a difference between a 10kg x 5 inch eibach or swift would mean one or the other does not truly hold its rate in linear fashion. There have been no recent test that show swift springs falling short of its rates. i doubt the rates and lengths are actually the same if you are saying you've determined a noticeable difference with these absolute back to back test. In any case, why would you even make this change? Unless you actually damaged your springs or dampers.