We race them in the winter time with a bunch of people we know. The place we run them at is 1/8 mile. And these things can fly. The track is 25 ft (just guessing) and that includes the shut off area, etc. The fastest one out at that track is around is in the 4's @ 65 mph. Our fastest is a '63 Impala. 155 grams, 6.30 (almost 1/2 a second) @ 47 mph. Between us and our uncle we have about 20 cars.