In exhaust gas turbocharging, some of the exhaust gas energy, which would normally go to waste, is used to drive a turbine wheel and shaft. On the shaft as the turbine wheel sits a compressor wheel, which draws in ambient air, compresses it and then supplies it to the engine.

What are some of the advantages of exhaust gas turbocharging?

:: Compared with a naturally aspirated engine of identical power, the fuel consumption of a turbo engine is lowe, as some of the normally wasted exhaust energy contributes to the engines efficiency.

:: The engine’s torque characteristic can be improved. Therefore, climbing a hill requires fewer gear changes and speed loss is lower.

::The power-to-weight ratio, i.e. horsepower (power output)/lbs. (engine weight), of the exhaust gas turbocharged engine is much better than that of the naturally aspirated engine.