NASCAR's Chase for Cup finally begins Sunday. Here's a look at
important facts and figures for the sprint to the finish.
Sylvania 300 at Loudon, N.H., 2 p.m. ET Sunday, ABC.
7,920 feet: The number that will decide the chase.
Many measurements will help formulate the 2007 Nextel Cup
championship -- research, qualifying position, fast pit stops, quick
laps and circuits led. But the most telling number may be this: 7,920 feet.