There are two ways to win a Nascar race. The first is to go faster, when you’re in motion, than anyone else. The second is to spend less time at rest than your opponents, shaving away expensive tenths of seconds sacrificed in pit stops. Caleb Dirks, a former pitching prospect for the Atlanta Braves who now applies his length and leverage as a jackman, sprinting out with his hydraulic device and pumping the pitting car airborne. A four-tire pit stop is a frantic five-man ballet—all tight corridors and heavy equipment, set at breakneck tempo. Its nuances aren’t as telegenic as...