In Reply to: K MAC CAMBER KIT QUESTION.....(more) posted by JL in Taipei on February 11, 2000 at 09:36:19:
The problem is this. When you lower a car you change the designed suspension geometry. The caster and camber is not adjustable on the Z3, only the toe. In the rear nothing is adjustable.
If your car was lowered the geometry changed. You can "get away" with it on the front but the rear camber WILL be affected and not in a "good" way.
The K-Mac kit(s) will make the suspension adjustable to correct for the changes made when lowering.
In my car, being lowered only ¾" required changes to all my suspension adjustments. The front is fine, in the rear I have 1 degree of "extra" camber (this was with a "competition" alignment made in a race shop). Without the adjustability it would be off by a lot more causing the handling of the car to be less than it should be as well as wearing rear tires out quicker.
Being "in range" can mean many things. Plus or minus so many degrees and you are fine as far as the factory is concerned but it is not optimum. When you can not adjust anything that range gets a whole lot broader. So as far as BMW is concerned it is fine because they can NOT correct it.