Quote:
Originally Posted by PeanuKeeyes
Congrats on the car, you’re going to have a lot of fun with it, I’m sure. A few thoughts:
I love the Billys I have on my old BMW but I’ve heard conflicting things regarding their performance and ride quality on our chassis. I would take your time and read through some threads here as a lot of it has been discussed at length.
If it’s a daily and occasional track machine, the M Performance Suspension by BMW (33-50-2-320-928) for $725, lowers the car about 20mm with stiffer spring rates and slightly more aggressive valving, good rebound, and is a significant improvement over the base suspension. It should handle occasional track days and backroads well when paired with a good performance tire.
However, you’ll want some negative camber adjustment up front as there is basically none on our cars stock. You could get a set of coilovers with built-in camber plates or get a set of street camber plates that can be used with any suspension. I opted for Millway street plates with about -2.5 degrees adjustability with the OEM M-adaptive suspension. You can get close to -2 in the rear without any aftermarket mods. I love it. Rides great on street and saves tires at the track.
If you forgo camber adjustability, I wouldn’t recommend doing many track days without dedicated rubber with a good deal of durable sidewall like an RT660, RS4 or other 200tw tire..
You might want to consider skipping sway bars at first as they are a PITA$$ to swap out on the 2-series and there’s tons of performance to extract from the stock ones.
For wheels/tires, a few of us here opted for the TR Motorsport wheels from TireRack in 17x8 ET40 size and run square setup 245/40/17 200tw tires for track days without rubbing the fenders. You can setup a package like this for about $1,500 all-in with TPMS installed. The blue M sport brakes will fit with this setup as well.
I don’t know your budget but if you’re somewhat conservative like me, this is what I would do:
1. M Sport Blue calipers / good pads
2. Wheels / tires - a good summer performance tire, something with a stiff sidewall that can take some punishment without falling apart. If you’re planning a lot of track/ autox days, spring for something like the RT660, RS4 — something that won’t kill you if it rains on your commute and will hold up on track.
3. Alignment
4. Go have some fun. Assess how it feels
5. Maybe Coilovers or BMW M suspension with camber plates then fresh alignment.
6. Now really have some fun
Hope this helps
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Go try the koni sport shocks, good price for what you get!