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      08-20-2022, 10:29 PM   #12
c18
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Drives: F10 M5
Join Date: Mar 2021
Location: CA

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2013 F10 M5  [9.50]
Quote:
Originally Posted by markw10702 View Post
H&R race springs and Koni dampers. Konis are a far superior damper to the Bilsteins due to the ability to adjust the rebound. For the rear I'd suggest the 8042-1134 Koni. It is a double adjustable (compression and rebound) shock originally built for the Fox-body Mustang. The ability to adjust compression for the track is huge.

The rear Koni also has a shorter body so it will work much better with a lowering spring such as the H&R race spring and won't be on the bump stop all the time.

To use the front Bilstein B8 with a lowering spring, you really should cut the internal bump stop down, otherwise you'll be riding the bump stops with those race springs.

IMO - The ultimate non-coilover suspension combination is as follows:

1) Turner J-Stock springs (680lb front / 1026lb rear spring rates)
2) Bilstein Group N Motorsport dampers (Front = 34-046296 Rear = 24-000624)
3) BMW OEM camber corrected top mounts (31331139484)
4) TMS fixed camber plates
5) 22mm front sway bar 19mm rear bar

This assumes you have 51mm front strut housings. This setup is not cheap but far superior to anything Ground Control offers.

Your car will handle like a go-kart. There won't be much that will be able to touch it in the corners (assuming you know how to drive it through the corners - trail braking will be important to get it to rotate but that is more of an overall E30 chassis thing).
You have been more than helpful, I personally do not mind going for coil overs on the car but what you have mentioned seems really proper to me, Thank you so much for the info, and have a great rest of your day good sir.
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