Mountain race 2

Do you think the speed of the car is too emphasised? What times

do you use to emphasize the speed?

To help emphasize the speed of the car, it's probably best to leave either the car or the background in focus. This will help demonstrate the difference in speed between the two.

As for shutter speeds, that's extremely variable, depending on how fast the cars are moving. That's something you'll have to play with yourself to decide. If the car is moving only 40MPH (64 kph), it's going to take a seemingly very long shutter speed to catch that speed, and you'll have to be real steady panning with the car. If the car is moving 200MPH (320kph), you'll have much more to work with.

Take a pen and paper and scratch down notes on each shot, see what you get.