So this topic is related to items number 3 and 4 below, with the goal of upgrading from non-M 1/3/Z series
Afaik there are two options from BMW:
A) The M components from the E-series 1 and 3-series
B) The M components from the new 2/3/4-series (as demonstrated by @Hydra Performance )
Here's the data I have been able to find:
Main questions I have:
My Z4 currently runs M arms with a spherical bearing kit. Lighter and stronger front swivel bearings and wheel hubs would be nice to have. Also my left swivel bearing is ever so slightly bent, which means it has around 0.2-3deg of camber less than the right side. The negative of upgrading would be the lack of OTS dampers and coil-over kits (which is already super limited), but then on the other hand, it might be fun to try M dampers at some point.
Afaik there are two options from BMW:
A) The M components from the E-series 1 and 3-series
B) The M components from the new 2/3/4-series (as demonstrated by @Hydra Performance )
Here's the data I have been able to find:
Main questions I have:
- Do front dampers that fit the clamp connection of the 1 and 3-series M swivel bearings also fit the new M swivel bearings? Ie would a 1-series M front strut fit the M4 swivel bearing and would the ride height be significantly different?
- When installing big brake kits, besides the issue with the dimples, is the brake rotor hub and caliper mounting bracket the same dimensions for both stock, A and B? I guess any BKK supplier would know this. If the dimensions are the same, I guess it would be easy enough to make holes for the dimples or remove them.
- Has it been confirmed whether the wheel speed sensor from the E-series installs without problem on both A and B? Maybe @Hydra Performance has tested this by now?
My Z4 currently runs M arms with a spherical bearing kit. Lighter and stronger front swivel bearings and wheel hubs would be nice to have. Also my left swivel bearing is ever so slightly bent, which means it has around 0.2-3deg of camber less than the right side. The negative of upgrading would be the lack of OTS dampers and coil-over kits (which is already super limited), but then on the other hand, it might be fun to try M dampers at some point.
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