again,not claiming that a SB would take anything off the 1/4 as the timer starts from when the beams are reconnected. That means AFTER the car has started moving,and therefore not affected by the booster. It will make it seem that your reaction time is better though,when racing another person. If you both hit it at a light at the same time, if he has instant response and you have to wait a second, he will start out in front...