Turbo Charger A turbo charger utilizes a turbine which is driven by hot engine exhaust, when these gases expand it will spin the turbine at high speeds, which forces air into the engine. Engine oil is used to cool and lubricate the turbine shaft in the turbo housing. In some applications, an Inter-Cooler is used to cool the intake charge before it enters the engine, thus increasing horsepower.
Inside a Turbo Charger To help regulate the air intake pressure a device called a waste-gate is designed to release boost at a measured pressure point. This is done to limit the amount of boost the engine receives; if the engine is boosted too much it can cause internal engine failure. A turbo charger increases the compression of the engine, so to combat engine ping (detonation) low compression pistons are installed. Turbo chargers help reduce the amount of fuel that is required to achieve the same level of power.
Turbo Waste Gate (cut away)