My best time on street tires was a 1.902 at Englishtown a while ago but ince then ive run strictly drag radials. Recently I added Eibach's Pro Kit and KYB AGX struts but you could instantly feel the car lost its weight transfer and I was afraid id hurt my 60fts but beyond that the springs are and EXCELLENT investment for anyone wanting to do it. Anyway I ran on street tires for the first time in years at a new track and I may have ironed out a few bugs but the slips were promising. The track IMO is well kept and I hooked my 1st time out 2.000 and went 13.94. The hooked 1.905 and went 13.75 and lastly I ran and gave it too much and went 2.1 and went 13.922. Over all Im extremely happy with the springs now that I know I didnt lose all that much in my 60fts. Im gonna run with the drag radials in the near future to see how I make out but so far for the $ the springs have had the biggest impaxt on how the car feels and as far as I can see didnt hurt me too much at the strip. I know a few people were wondering the same as I was about the springs and 60fts, this isnt a definitvie answer for everyone but I figured Id post MY experiences thus far...Heres the run if you want to check it out... 13.94 Run

 

Did the eibachs actually lower your car any or were the old springs worn out enough that they didn't make a difference?

If they did lower your car you could get some LCA relocation brackets (if you don't already have them.) They should help your 60fts even more.

 

The car is only slightly lower than stock, I guess 10 years worth of holding the car up made the springs sag, but the stockers gave NICE weight transfer. I could feel instantly the new springs took some of that away, thats why I was afraid to see how bad they would be at the track. So far I cant complain, but next up will be bolting on the drag radials and seeing if I can get 1.7s still. Its funny you mention LCA relocation brackets. I just got a FedEx delivery from Spohn this past Sunday and Ill hopefully have times with them installed in the coming weeks, hopefully they make a difference...