928SE front springs
 

We discussed this matter a few months ago, but it was never concluded. I cleaned up the dampers on the front of my SE and here are the pictures

I would say the 3 x paint markings are more Orange than Brown. I guess the wire diameter will also help if a few of us measure, mine are 14.7mm

There is also another number stamped at the top, with the Porsche P symbol - has anyone seen these numbers before ?


https://cimg2.ibsrv.net/gimg/rennlis...0c3ca1e657.jpg

https://cimg4.ibsrv.net/gimg/rennlis...c652698966.jpg

https://cimg5.ibsrv.net/gimg/rennlis...b21aa77a1a.jpg

looks orange to me

They certainly look like SE springs to me.
I agree definitely orange.

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
https://cimg8.ibsrv.net/gimg/rennlis...9a34b86371.jpg

https://cimg9.ibsrv.net/gimg/rennlis...9f6e9d856b.jpg

https://cimg1.ibsrv.net/gimg/rennlis...7e1a00dba1.jpg

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

One more non-Pantone-calibrated image of orange dabs on Clubsport springs:

https://webfiles.uci.edu/redwards/pu...2010-18-06.jpg

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.

The CS/SE front springs were stiffer but I am willing to be corrected by Mr. Edwards 8>)

Here are the specs on my "Brown" springs.

The diameter of the coil is 14.55mm. The smaller diameter over the SE/CS springs with orange paint confirm they would be stiffer.

Here is a shot of the paint on my 88 S4
https://cimg7.ibsrv.net/gimg/rennlis...b787492996.jpg

https://cimg8.ibsrv.net/gimg/rennlis...89aedc4ab7.jpg

There is a number stamped in the coil as well

https://cimg9.ibsrv.net/gimg/rennlis...a0238bced9.jpg

Michael, Thats great information that you posted there, and shows the Brown markings are indeed Brown, and the 'Orange' markings are an Orangey Brown :rolleyes:

The wire diameter is useful too

I guess if we could establish at ride height how many of the coils do not touch, we could calculate the spring rate differences too

When my car is back on the floor (I'm doing a rear suspension refresh currently) I'll see if I can get a mirror in there to see....

Rob, Can you check if your NOS spings have the white lettering AHH 928409 at the top ?

......and if you are selling that set - I'd like to buy :bowdown:

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 (?)

https://webfiles.uci.edu/redwards/pu...2010-29-11.jpg

9 lbs 4 oz:

https://webfiles.uci.edu/redwards/pu...2010-29-11.jpg

looking at the date stamp, maybe a later run produced by Eibach for Porsche ?

Usually OE parts made for Porsche have the P symbol (in a triangle), like on my springs between the letters

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.

Thank you for the pictures and information :bowdown:

Here is a regular M474 spring, with three brown markings.

https://cimg4.ibsrv.net/gimg/rennlis...68b74ba83c.jpg

Now, I will need to check this on my new CS, also.