Typical street-car engines can run for hundreds of thousands of miles, but top-fuel dragster motors need rebuilds after every quarter-mile run. That might seem ridiculous, but the seals only last one full-throttle pull, and the spark plugs disintegrate during the run.

In the world of NHRA Top Fuel racing, a dragster engine—an 11,000-horsepower monster—is designed for absolute power over durability, typically lasting only one single run (roughly 3.7 to 4 seconds of full-throttle use). After every "pass" down the 1,000-foot strip, the entire engine is completely torn down and rebuilt by a crew of specialist mechanics in about 75 to 90 minutes. The stresses are so extreme that the spark plugs are often destroyed by the halfway point, and the engine essentially "dies" just as it crosses the finish line. Even if an engine survives the run intact, it is never used again without a full inspection and part replacement. In 2026, despite advancements in metallurgy, the philosophy remains "maximum output for minimum duration," as any part designed to last longer would be too heavy to win the race.