[jclaib7]

I reached out to Vorshlag with this question and one of their engineers gave me a very detailed and technical response so I thought I would share it here and close the loop on this. I'll report back after i've had the camber plates installed for awhile.

"John, there are three issues here, so I'll address them all.

#1, yes, all camber plates, all brands, even "street" plates, add some NVH to any car they are installed on. Our camber plates do not make or cause any noise, but removing a big chunk of rubber and replacing it with metal will allow noise from other parts of the car to be transferred to the tub, and on to the passenger compartment. Adding a small isolation biscuit, or a rubber gasket under the spring isn't enough to change this. There should be NO knocking or rattling from the camber plates though, only a slight change in harshness and other noises being passed on. For most cars it is about the same as going to a +1 tire fitment.

#2, the F30/F80 series cars have rubber embedded sphericals in their suspension which is great for performance use, but passes on more noise than the solid rubber or fluid filled bushings they used to use. We are finding that about one in ten of them have an issue with something in the lower suspension, front cradle or transmission. This issue is making noise and transferring it to the tub. This is more noise than normal, and it's isolated to this series of BMWs. We've had customers swap from one brand of camber plate to another, and then another with the noise following them. I can't tell you if your car will be a noisy one or not, and despite a few dealers digging into these cars we don't know the source of the noise. I have not had an affected car available to us to see if we can find the source, which I suspect is a control arm bushing that has a good spherical, but damaged rubber.

#3, the first short run of camber plates with OEM style spring perches I made for this car did not accommodate the upper spring isolator. We found that as the spring moved it would make a "tick" noise as it compressed over the nose of the spring perch. One of our customers gave us feedback about this issue at the same time he posted online. I redesigned the spring perch to use the OEM upper spring isolator and sent them out to the few owners that had the early version. That solved the spring-tick issue they found."


Thanks,
Jason McDaniel - Lead Engineer, Vorshlag Motorsports