Z4 FCABs?, new Konis, and...?

[Mendoteach]

You all have some gorgeous looking cars. Really impressive. Mine is pretty darn clean. Once I get some mechanical stuff sorted I'll work on getting it looking somewhat like all of yours.

Also M3 or Z4M bar will fit and be cheap af

OP the driveability issues sound like alignment (toe out). If the FCABs are trashed then the front tires will toe out at speed and feel twitchy on the highway. New bushings with a touch of toe in will make it very stable in a straight line.

Definitely could be an alignment. It wandered and tramlined horribly until I replaced the front tires. Now it's just a wee bit nervous. I will get an alignment after I replace the shocks and bushings.

Stick with the rubber. They are solid and not liquid filled like the factory units.


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Are the Z4 bushings oil filled or solid rubber?

[Vas]

You all have some gorgeous looking cars. Really impressive. Mine is pretty darn clean. Once I get some mechanical stuff sorted I'll work on getting it looking somewhat like all of yours.



Definitely could be an alignment. It wandered and tramlined horribly until I replaced the front tires. Now it's just a wee bit nervous. I will get an alignment after I replace the shocks and bushings.



Are the Z4 bushings oil filled or solid rubber?

Solid Rubber

[d-rod]

I’m going through a suspension refresh myself.
I already did new Koni FSDs and have new control arms coming in and redoing all bushing/ball joints for rear trailing arm.
You might as well replace the sway bar end links while you’re in there. One of mine was torn at only 9Xk miles



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[John in VA]

Sorry for not searching or remembering, but what is the M or Z4 front suspension part that is often recommended but ends up putting the wheel/tire forward in the wheel opening vs. original? I'm all for "while you're in there" upgrades, but this looks strange, to me. Thanks in advance!

[holyc0w]

Sorry for not searching or remembering, but what is the M or Z4 front suspension part that is often recommended but ends up putting the wheel/tire forward in the wheel opening vs. original? I'm all for "while you're in there" upgrades, but this looks strange, to me. Thanks in advance!

Z4 FCABs

I believe M3 FCABs are centered, so they would be similar to stock.

[Mendoteach]

It is my understanding that the Z4 bushing adds a bit of caster. That will increase the the wheels "self-centering" tendencies and increase the steering weight some.

[Mendoteach]

I’m going through a suspension refresh myself.
I already did new Koni FSDs and have new control arms coming in and redoing all bushing/ball joints for rear trailing arm.
You might as well replace the sway bar end links while you’re in there. One of mine was torn at only 9Xk miles



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I'll have a closer look at the sway bar end links.