Ground Control

[D-rock]

What spring rate are you guys running and why?

[E30SPDFRK]

300f 475r

running them because that's what they had attached when I got them. Not a bad ride, old people complain but I think its nice.

Switching it up to 600f 700r soon though.

[z31maniac]

BRonzit was 350/500 when I got it.
After S52 was 550/750

The 318is, not sure, I'd have to ask the PO or take the wheels off, but I'm wanting to say something in the 325/475 range I think?

[DRTSRFR]

440/700 on my two coupes and 440/800 on the 'vert.

For me this is the best combo for balance and comfort...firm but not harsh.

[nando]

600/700

rides fine except my konis are toast. time to rebuild them or upgrade..

[White325is]

650/750.

And because I was running such a wide wheel/tire combo. Didnt want to rub.

[george graves]

BRonzit was 350/500 when I got it.
After S52 was 550/750

How did you come about to pick those rates? Just interested.

[z31maniac]

How did you come about to pick those rates? Just interested.

The 350/500 was on the car when I got it.

The 550/750 came about after a few different conversations with Jay and Frankie at Ground Control. Explained the engine (S52), sway bars (22/19), tires that would be used (sticky 235/40/17).

And came to those rates, but with no rear bar.

[rwh11385]

Car first had 300/475 - the setup GC has given a lot of street E30s.
Then I got a set of 500/650 - was a lot faster around Auto-X course, have not been on a roadcourse yet. Of course stiffer, and more bouncey, but I have a blown strut.

I'd go 350+ in front... with a 500 in back or so.

[Jean]

500front/650rear with no rear bar, worked great in autocross. sold it to to switch to higher rates with the engine swap and wider/stickier tires.
I will probably end up with rates similar to what z31maniac posted above.

[gearheadE30]

350/475. I've been happy with it, but it may be a little too soft. I was told by Jay that the billies can't really handle much more than this though.

[Stephen]

300/500 and happy. If they come around at the right time i might bump up ro a 350 up front but its not really that big of a deal. Running fairly aggresive fitment as well

[z31maniac]

I will probably end up with rates similar to what z31maniac posted above.

Good rates to be sure.

And you v710s will prevent the traction issues I was having!

[BigD]

550/750, because GC told me this is about the most the regular Koni SAs can handle while leaving a smidgen of adjustability. It feels fine on the track but it could definitely be better. After the turbo, I'll be doing a new suspension with 4 figure rates (front for sure).

[khnordeen]

Are there any differences in the sleeves themselves depending on the shocks/struts that will be paired with them?

I am currently waiting on some Bilsteins in the mail, but some sleeves I have come across I believe have been paired for Konis...

I'd call GC directly, but they are currently closed...

Thanks for any help.

-Kyle