going to the races
at the Texas Motorplex in Ennis (south of Dallas off of I-45).
you run time trials to get your 1/4 mile times. They then put you in brackets and they "normalize" your competition by setting the staging lights to where both cars should cross the finish line at the same time. In other words, if you run a 15 sec and someone else runs a 12 sec, then you get a 3 second head start. So, ANY vehicle can compete against ANY other vehicle (i.e. station wagon vs. corvette).
The trick, though, is to cross the finish line WITHOUT going below your computed time (i.e. run a 14.5 if you said you were going to run a 15.0). If you go below your time, you lose.
it's all about consistency....trying to run the exact same time EVERY time.