[cturboaddict]

I purchased these Eibach springs from a member who didnt have much info on them. I called Eibach but they said these were from the 90s and said they would get back to me. (Never did)

Called Dr Gas, he said the guy that would maybe know about them was out.

Called mustang's plus and he said the springs he has that are 3/4" in diameter are 620# rate. And the 9/16" were 260# rate.

Part number on spring says
Eibach Springs
30/96
Pro Motor Sports
65-66/9.0 R

They measure roughly 13 3/8" in height (compared to the 14" springs I pulled out). The diameter of the coil is roughly .637" so, just over 5/8", (compared to the .570" ones I renoved) They are progressive as well.

Anyone have a clue of the spring rate of these. My guess is that they would work fine for a street application.

 

[1ofAMillion+]

There are a few rate calculators on the googleFu. You input the specs and # of coils and it will figure a #rate. try a couple of them and use their averages

 

[HarryZ]

My Eibach springs (installed in the late 90's) are variable rate. So an online calculator might not be of much help. Suggest you keep hounding Eibach to get an answer that is hopefully correct.

Harry Z

 

[cturboaddict]

My Eibach springs (installed in the late 90's) are variable rate. So an online calculator might not be of much help. Suggest you keep hounding Eibach to get an answer that is hopefully correct.

Harry Z

Do you know the part number and rate of yours?

 

[HarryZ]

Do you know the part number and rate of yours?

Unfortunately, no. And it will be a while before I dig my car out of the garage and start working on it.

Sent from my Pixel 4 using Tapatalk

 

[289vert]

I seem to recall they made a coupla different progressive rate springs.
350/480 and 480/680. Or there abouts.