The pulleys add more midrange torque, which usually kicks in past the 660' mark. In the 1/4 mile it will add up to a tenth or more, which translates to a car length or more. If your within a thousandth it usually within a fender or bumper. Still great racing and good side by side action. Times won't change from reaction times, but win light is usually won on that. So it's possible for you to win a heads up race with him, just based on RT. Way to have fun at the track.