Custom Offset Lower Control Arm Bushings for STX/STU/Street/Track E82/E90 (Camber!)

[RyanDavies]

So, the custom offset lower bushings are done in prototype form.





These replace the lower front control arm bushing, and are legal to use in STX. They should allow for .5-.6 more degrees of camber than the stock lower control arms.

Obviously, they'll also fit E90/E92 Non-M cars as well. If anyone is interested, I can have another couple sets made up. I know that two sets are spoken for in addition to my one, and would probably not be a big deal to add any others. Because everything is custom made and machined, (including the metal sleeve), they'd go for around $150 / set (both sides). You've probably got a month or two to speak up on them, so do so . No money will be made on them, just trying to help folks out where there is not a reasonable alternative.

The SuperPro bushings that do something similar are very failure prone, as in my video here:

[HP Autosport]

Good alternative to the M3 arms. Nice!

[RyanDavies]

Installing Friday for the first time on my car. I'll do a before and after camber measurement compared to the M3 arms on the car as well. They *should* offer a little more, but we'll see.

[fe1rx]

Originally Posted by RyanDavies

Installing Friday for the first time on my car. I'll do a before and after camber measurement compared to the M3 arms on the car as well. They *should* offer a little more, but we'll see.

How does that bushing provide adequate articulation? That arm moves forward and backward as well as rotating around the bolt. A delrin bushing only allows for rotation around the bolt.

[RyanDavies]

In practice it doesn't really articulate very much, if at all in the fore/aft direction with the limited travel of stiffer springs. That said, order of business #1 when installed is to toss these on a corner of the car, with no spring installed, and check for bind while moving the suspension through its travel. If it binds anywhere, well, I've got a couple useless chunks of delrin. Whiteline's bushings are very similar (but not offset), as well as the non-adjustable SuperPros.

Out of curiosity, how would you suggest getting additional camber out of the car? My options are bushing replacement in the stock lower arm, and and do whatever I would like with the upper camber plate. If these don't provide enough (I would like adjustment up to 4 degrees at a reasonable ride height), I'll end up modifying that. It would probably involve increasing stack height a bit by spacing the plate lower, then tucking the nut under the shock tower. Perhaps Vorshlag could design me some plates that made that a reasonable option, the JRZ plates only allow for around 2.8 at a reasonable ride height without dorking with the lower arm.

[fe1rx]

The double lower ball joint design of our cars results in fore/aft movement of that arm when you steer the wheel, not under bump travel. I suggest checking that out.

I have no real suggestions for more camber beyond the M3 arm and camber plates.

[RyanDavies]

Originally Posted by fe1rx

The double lower ball joint design of our cars results in fore/aft movement of that arm when you steer the wheel, not under bump travel. I suggest checking that out.

I have no real suggestions for more camber beyond the M3 arm and camber plates.

Cool. Thanks, will do.

[funseries]

Are the SuperPro bushings really a no go?? Or did OP just receive a defective part?

I'm interested in these
https://www.ecstuning.com/b-superpro...pf394195k~spr/

[juld0zer]

There would only be excessive movement of the LCA if the caster bushes were worn/torn. There will always be movement but wear through normal use will cause a domino effect to the LCA.
M3 UCA or bushes are much firmer

[funseries]

Originally Posted by juld0zer

There would only be excessive movement of the LCA if the caster bushes were worn/torn. There will always be movement but wear through normal use will cause a domino effect to the LCA.
M3 UCA or bushes are much firmer

Are these KMAC any better/different? Much more expensive though.
https://www.ecstuning.com/b-kmac-par.../1939164h~kma/

"2x the load of stock bushings"

Also, do you lose fender clearance at all with these bushings, in the same way longer M3 arms would?