Originally Posted by OC kid
I vehemently disagree with your statement about there being "a serious question of expertise."
OK, I disagree back.
It all depends on who (what level) you actually get to talk to. Some of the shock guys will have designed their own active systems. That would help. But still their system could be entirely robust to such changes where others may not be. You will almost never get to talk to those guys anyway (they are hidden away at the design/engineering centers). You will get some application or support "engineer" to talk to at best and a sales guy at worst. Unless they have had specific training on this topic they will probably be guessing. BMW will almost for sure never tell us all the facts, without those anything else we will get, from folks selling springs or shock or whatever, all of the advice will be educated guesses.