Building Cars
Digital Dashboard

Is Stricter Enforcement of Pit Road Speed Limits Making Pit Road Less Safe?

The Purpose of Pit Road Speed Limits NASCAR implemented pit road speeding rules in 1991. The year before, Mike Rich, a tire changer for Bill Elliott, had been pinned between Elliott’s car and the car of Ricky Rudd when […]

Acceleration
Asphalt

How Tracks Take and Lose Rubber

The two words we heard most frequently last week in Pocono (after “still raining”) were “green racetrack”. Rain doesn’t just delay racing. When the race is finally run after a rain delay, it’s run on […]

Auto Club Speedway of California

Driving Concussed

Driving Concussed This week brings the return of Jeff Gordon to the track, but under conditions I’m sure all of us wish were otherwise. Dale Earnhardt, Jr. is out again (and will be next week) […]

Tires

When is a Tire Test Not a Tire Test?

Ch…Ch… Ch… Ch….Changes! If you were going to pick an icon for the upcoming race at Kentucky, it would be a giant question mark. It’s almost like coming to a brand new track. This is […]

Aerodynamic Forces

NASCAR’s Goldilocks Problem: How much Downforce is “Just Right”?

The Problem The current racecar handles badly when its aerodynamics are disturbed by another car. This makes it very difficult to pass. The advantage of having clean air become insurmountable, which makes for less exciting […]

Can You Really “Run Better than you Finish”?

“He ran better than he finished” is one of those things you hear and don’t think too much about. Unless, of course, you’re me. I wondered if it was really possible to tell mathematically (or […]

Energy

Conservation of Energy in a Crash

Last week on SiriusXM Speedway, we talked about how the kinetic energy of a race car (at 190 mph) is approximately equal to the caloric energy contained in two dark chocolate Easter bunny rabbits. The […]