I contacted koni and anything more than 650 requires revalving so with those rates you should be good Chris!
Chris, will the koni's be able to handle the firmer spring rates? I've heard that you may need to get the shocks "re-valved" when getting firmer springs...
Where did you confirm that the sportlines are 171/314? Is that an average or something since they're progressive?
I contacted koni and anything more than 650 requires revalving so with those rates you should be good Chris!
Post #159. I called Eibach and asked for the rates for our part number (#4.4140 for V6). The i4 rates are probably a little lower.
314/171 are the top end (firmest) of the rates for front and rear Sportlines. I used them to compare the firmest rate the Sportlines could even get to, to the rates of the GC's. Just wanted to know what kind of jump I was making when the springs are at their firmest, which has ended up being roughly doubling the firmess. Course the way different types of springs behave factors in too.
Gosh thats quite a jump! Thanks for identifying this. I skipped over that post somehow when I was going through this thread.
Awesome that you got these so quickly, Chris.
Will have to get in touch with this seller and find out some details for my plans as well.