Dirty air is the turbulent, disturbed airflow left behind a moving race car, and it's one of the most important (and frustrating) aerodynamic phenomena in motorsport. As a car moves through the air, its wings, floor, and bodywork are designed to manage smooth, ‘clean’ airflow to generate downforce efficiently. Once...

Restrictor plates are metal plates with small holes, installed between the carburetor and the intake manifold, that limit how much air and fuel can flow into the engine. This caps horsepower and, in turn, caps top speed. 

Fuel saving is a strategic lever across most motorsport series, though how it's done and why it matters varies quite a bit.Why fuel saving mattersRaces have a fixed fuel allocation (a tank limit, per-race fuel cap, or fuel-flow regulation), and running out before the finish means retirement or a forced...