When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
They certainly look like SE springs to me.
I agree definitely orange.
__________________
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Hey Roger, I have my springs out of my 88 S4 with sport suspension package (M474 option code). Remember the same three orange/brown paint marks. I'll grab a photo and coil diameter so you can compare.
Also, I noticed the height adjuster on yours looks a little different than the one from my car
Hi Michael,
M474 was the Boge red shocks only with no changes to the springs.
M637 springs were only factory fitted to the front of CS/SE cars. Rear springs were the same as all other 928's 87 to 95.
All other 928's 87 to 95 were fitted with the same springs.
Roger
Yeah, I saw a thread explaining the M637 option. My 1988 S4 5spd does not list the M637 code, as it is not an CE/CS. I will get you a good quality photo of the paint marks so we can all compare "orange" vs "brown" as well as the spring coil diameter and unsprung height so we can unlock the actual differences between the two springs. I'd be curious to know are the CS/CE springs shorter, stiffer, etc.
Are you planning on cleaning up the rust and refinishing the paint on those springs? I am curious since I have some paint chips on my springs and wonder if that needs to be fixed before installation.
That pic of the springs in the bag is 7 years old, they're currently holding up the front of my GTS.
They don't have the AAH number on them, but they do have a manufacture date on them, and interestingly enough an Eibach stamp. Which begs the question of A) can Eibach tell us the spring rate without having to kill us, and B) can anyone sweet-talk them into winding more sets (?)
Criticals for determining spring rate are wire diameter, coil diameter, spring length, number of coils, and coil spacing.
The Eibach guys in SoCal have a spiffy spring and shock "dyno" that helps you find some interesting dynamic info.
If you have a set of car scales (like for corner balancing), you can put one in a press under the bottom of the spring. Then with a tape measure you can build a chart that shows actual spring pressures (and then calculate rates) at different compressed lengths. Put A Safety Cable Through The Spring if you decide to try this.