Engine Performance: System: Turbocharger: Operation: Compressor
The compressor is connected to the turbine by a shaft. The compressor forces an air charge into the intake manifold which is more dense than what would normally be drawn in at atmospheric pressure.
With a higher intake manifold pressure and denser charge available, more mixture is drawn into combustion chamber on piston intake stroke. The increased density of the intake mixture results in an increase in engine power.