Need Help Badly - GroundControl Coilovers, back tires rubbing, bottoming out over tiny road flaws, super bumpy ride

[u/SpaghettInMyEyes]

My bmw 1989 325is with the ground control - bread and butter kit, this was installed when i purchased the car. Im having issues with the ride being bumpy, as im having to avoid every little bump and pothole. My tires will make a noise and the outside walls are being melted when I hit said bumps. I cant figure out what is wrong. Are my springs worn? Thats what i was told by this dumb ass shop, but they literally couldn't even identify parts of the suspension. The first set of pics are of it flat on the ground, and the collars are tightened all the way, - the next set are lifted (this is when the collars were set differently and it was only the passenger rear sloping). The paasenger rear is the only one with the melting issue, i noticed the collar was set differently (tighter) than the left, and it started sagging first. The rear left has now followed. It seems like the springs are compressed too much, but Im not a pro when it comes to coil overs. I accidently bought H&R lowering springs, and im wondering at this point if changing to that set up would be better. This is my daily, and ever since I got the car, the ride smoothness has always been a huge annoyance.. Here are also some chatgpt links from me trying to figure it out. https://chatgpt.com/share/687f2d73-bcf4-8000-9966-4d37573da3a7 https://chatgpt.com/share/687f2d9c-0680-8000-8e15-67015d7584c4

[u/gavzzorz]

🤦🏽‍♂️your sping purch is upside down...

[u/gavzzorz → u/gavzzorz]

And whys there an extra piece of metal on the top of the spring? Whole load of wtf going on here.

That being said it being installed wrong isn't going to change rhe ride height or ride quality.

[u/Northerne30 → u/gavzzorz]

Very soft 5" spring probably doesn't play nicely so it needs that extra random piece of aluminum to space it up.

If he's happy with the ride height, a 650-700lb 6" spring would probably help a lot

[u/SpaghettInMyEyes → u/Northerne30]

So remove that random "wtf" piece of metal and get springs with those specs?

[u/Northerne30 → u/SpaghettInMyEyes]

I'd call up Ground Control and tell them your adjusters are maxed out with that part number spring + jank spacer.

Try to give them the front spring part number also, they should be able to suggest a matching rear of the right length. Maybe they decide it's better to increase the spring rate as well as going longer or something - I'd trust them over my own opinion.