supercharger

Supercharger (also known as a blower) is a gas compressor used to pump air into the cylinder combustion engine. Mass additional oxygen is forced into the cylinder making machines burn more fuel, and increasing the engine's volumetric efficiency and make it more powerful. A supercharger is powered mechanically by the rope-or chain-puller of the engine crankshaft.

Similar supercharger with a turbocharger, but the turbocharger is powered by the flow of gases that drive the turbine engine. Supercharger can absorb as much as a third of crankshaft engine power in most applications and are less efficient than turbochargers. In applications where power is more important than other considerations, such as top fuel dragster and vehicles used in tractor pull competition, the supercharger is very common.