SCIENCE OF SPEED: TIRES AND PRESSURE

submitted by: nsf

NASCAR tires don't have "air pressure" because they're filled with nitrogen. The culprit responsible for increasing tire pressure during a race is friction. Using dry nitrogen gas helps the team predict how hot the tire will get and how much the pressure will "build" during a race.

SCIENCE OF SPEED: SOUND

submitted by: nsf

"Loud is fast" Brian Vickers tells us, and speed is one reason racecars don't have mufflers. Experiencing a NASCAR race means feeling the roar of the engines as well as hearing them. It's all good--as long as you’ve got your ear protection.

SCIENCE OF SPEED: GRIP

submitted by: nsf

There's one thing every driver always want more of: Grip. Grip is the frictional force that holds the tires on the track, but crew chiefs like Steve Letarte describe it as a 'warm and fuzzy feeling' when you have it. Whether mechanical or aerodynamic, more is always better.