Hemi engine

A hemi engine, short for hemispherical engine, features cylinders with combustion chambers shaped like a half-sphere or dome. This design allows for larger valves and a more direct airflow, which improves the engine's efficiency and power output. The hemispherical shape also ensures better burning of the fuel-air mixture and reduces the likelihood of valve interference. These benefits make hemi engines popular in high-performance and muscle cars. They are known for their strong power delivery, smoother operation, and distinctive sound, combining efficiency with power in a compact design.