Trying to understand.. so if the car is going lets say approx. 100mph you set shutter at 1/100, and with that in mind you are expected to pan and keep the car in frame as you shoot? If you are lousy at it just set shutter faster and hope

Also guessing you set manual focus at a distance you expect the car at as best you can. Looking at the shots on the tiny led they look great.. until you see them on a 15" screen.