Lead

Ballast: Tungsten vs. Lead

NASCAR penalized a couple of teams recently for dropping tungsten ballast on the racetrack. Let’s revisit why those chunks of tungsten are there in the first place. Ballast is weight added to a racecar to […]

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Brakes

The Zen of Brake Bias

With all the talk about giving the drivers the ability to change aspects of the setup from within the car, I thought some comments on what types of changes they can make would be appropriate. […]

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Drivers

The Virtual Reality of Racing Simulators

You are hurtling down the frontstretch at Michigan, your speed approaching 215 mph. Your seat moves up and down as you hit the seams, but your focus is squarely on getting into Turn 1 losing as little speed as possible. You squeeze the brakes and feel yourself moving forward, only to realize that you’re still moving too quickly. As the car starts to head toward the wall, you panic and squeeze the brake even harder.
The car snaps loose and the next thing you feel… is an engineer’s hand on your shoulder. You turn around to see her barely suppressing a smile. […]

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Goodyear

Camber Angle and Tire Wear

We’ve heard a lot, especially this week at Richmond, about tire wear. A lot of right front tires were wearing excessively. As seems to be usual at this point, teams would like Goodyear to use a stronger tire and Goodyear would like teams to dial back their setups, especially their camber. […]

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Aerodynamic Forces

The Flap over Roof Flaps

Why Roof Flaps? Roof flaps (the invention of which I detail in my book The Physics of NASCAR) help keep cars on the ground.  This is necessary because of Bernoulli’s law, which says basically that: Faster-moving […]

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Suspension

What Does the Trackbar Do?

Thanks to a suggestion by reader Anthony Bardoll, I’m happy to present the first in a series of articles on car adjustments.  Anthony mentioned that a lot of people do iRacing and have the ability […]