Sometimes you need to increase the rebound on the dampers to get the tyre to press back down onto the road after a bump. If the car is bouncing up over a bump then the 'bump' setting on the car maybe too stiff, however, if the car is not bouncing up over the FIRST bump then the bump setting maybe too soft and might need stiffening a bit.
A good place to test this out is circuit de la sarthe. With very fast cars as you go along the straight you can see how this all works. Stiffer settings there should yield good results, but you will be able to see what happens when you try soft dampers and then harder dampers.
Once you've got the hang of that you can test things out on nurburgring
Last edited: Feb 16, 2013