Can anyone identity these springs?

[wkohler]

Hello! I finally have gotten a chance to look around under my 2800 CS. I expected it was on stock springs but I caught this metallic glimmer under the dirt so I did some cleaning (more to come obviously) and was surprised to find these springs. They are either cad or yellow zinc plated versus painted. The front springs at full droop are slightly loose between the hat and the perch. I don’t see any markings on them at all.

I’m sure they’re pretty old, but was curious what they might be. Here are photos of the rear spring, the front spring and how the car sits (spacers are still installed above the strut mount). Thanks!!

 

[Krzysztof]

I believe it will be very difficult to tell anything about the producer/type once they have no markings.

Could be they have some but all was covered by body protection paint.

There are a ways to measure the spring. Here's one article about it:

E30 Stock Spring options and Spring rates | RTS - Your Total BMW Enthusiast

These are from technical specification drawings for stock E30 springs straight from BMW Germany. The spring forces and lengths were from BMW Germany, while I calculated the spring rates to accurately compare the springs per inch of travel. Only looking at spring force does not allow you to...

www.rtsauto.com

 

[Ohmess]

Sorry Chris, can't help with your question, but your car sits really nicely with them and to my eye those are not stock springs.

 

[adawil2002]

I have a set of old gold front 'sport' springs I bought from an old CS parts stash. I run stock CS rear springs, detailed in Paul Cain's Spring posting. The suspension is the same in both photos. Stock wheels with 195/70 14s. & BBS with 205/55 16s

 

[Mike Goble]

I had ST springs on my Bavaria and they were gold colored.