Some times old stock springs sag lower than new lowering springs get you, I had this happen to me before. How long have you had them on? have they had time to settle in?
The rear definately dropped about 1/2", but the front did not... it should be lower. The springs have been on for about 50 miles through bumpy roads... I was hoping they would settle in, but haven't.
I have Eibach/KYB's on my 280Z. Its hard to tell looking at pics, but I think my front springs are a bit shorter than the ones shown. I do know that I have my springs ziptied to the perches because at full droop the front springs are not compressed at all and would be loose on the spring perch. My front ride height is a bit lower than yours, but then I also have a heavy turbo/intercooler setup that may be adding more weight up front.
Yes, and your part number is 6303.XXX as opposed to my 6305.XXX (referencing Miles post just above). They also stated there was slop between the perches, and I had to use a spring compressor to get mine on.
My car is a '73 240Z. That post was helpful, and appears he ran into the exact same problem as me. He has 240Z struts and 260Z struts to interchange though, and the perch was 1" lower on the 260Z. Hmmm... I am going to go measure my struts and perches to see if maybe they were changed at some point, then call Eibach for answers.
Edited by PCressey, 20 January 2015 - 02:43 PM.