Vehicle Reaction Timer?
When it comes to drag racing, it's all about removing variables from the equation and keeping the car as consistent as possible. That can be extremely difficult to do if you do not have a device to measure those consistencies. One of the most important moments in drag racing is the launch, because it can effect your elapsed time as well as your reaction time. If your vehicle is not launching consistently every time, there is no way to be consistent and go rounds.