I’m tired of hearing all these technical explanations about engine failures. It was much better when the driver and crew chief just said, “It blew up.” Besides, all of these technical terms are ignoring the real reason that the cars run. We suspected the truth back in the day, but I never heard it explained quite as well as an old mechanic did in telling my son about it one day. Forget all that stuff about pistons, rods, camshafts, crankshafts, bearings, etc…. What really makes a racing engine run is magic smoke.