Originally Posted by 1speedbike
Hmm.. i was always under the impression that koni FSD are great for the stock springs and springs like the BMW performance springs which don't really drop the car too much, and the yellow sport shocks were meant for lowering springs. who knows, i'm happy with what i got
correct. that's the case because of the way the FSDs work. they essentially analyze compression frequencies to determine how to adjust damper rates. when riding low, the oem bump stop gets a little more involved in the whole process than it would be otherwise. the FSDs reportedly have some issues interpreting the early ramp-up in their perceived springrate when running into the bump stop. a shorter firmer bump stop would allow more travel prior to the bump stop.