By on November 3, 2017

“Why can’t we have coolant in the car when we’re racing?” It was getting close to midnight and I was still trying to get the undertray off our MX-5 Cup car so I could drain the distilled water and get coolant into the radiator. There was a bit of a time factor involved; the temperature was scheduled to dip below freezing in the hours to come, and if the water froze in the engine block we would have serious problems. Danger Girl understood perfectly well why we couldn’t let our little Mazda make it through the night without coolant in the engine, but she didn’t quite understand why we didn’t have coolant in there to begin with.

In her honor, and for the enlightenment of every would-be track rat who has been afraid to ask why such-and-such a rule exists, I’ve picked seven slightly opaque trackday or racing rules and explained them below. Even if you never plan to set foot or tire on a road course, this might still of be of interest… or not. What can I say? I tried to get you to click the jump. Click the jump already!

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