![]() ![]() This means, you can generally accept to increase performance of an engine, via turbocharging, or supercharging, by around 40% or a little less (there are efficiency losses during the process). This is around twice normal atmospheric air pressure which is 14.7psi. Typically, both a turbocharger and supercharger will pump around eight pounds per square inch (8psi) of compressed air into the engine. Think of it like this, a turbocharger is, more or less, like a mouth blowing air onto a fire to get a flame going. Like a supercharger, a turbocharger is designed to increase the amount of compressed air into an engine. Thus more fuel can be injected, thus more power and torque can be produced because of the bigger bang. Once the compressor is spinning (at up to 50,000-plus revolutions per minute) there is air being forced into the engine. This belt wraps around a pulley and a drive gear which helps to turn the compressor gear. ![]() Unlike a turbocharger which relies on exhaust gasses to power/spin the turbine (a fan), a supercharger is directly connected to the crankshaft, usually by an accessory belt. Indeed forced induction, either by turbocharging or supercharging can increase power and torque by around 40% and 30%, respectively. ![]() Indeed, a turbocharger is from the same family as a supercharger – it’s all about “forced induction” (FI), or forcing more air into the engine to allow for a bigger, controlled explosion in the cylinders and thus more power. The word turbocharger is actually an abbreviation of the word turbo-supercharger. Turbochargers and superchargers are from the same family A supercharged is directly driver by a belt from the engine. A turbocharger has its compressor driver by a turbine (“fan”) that is spun by the exhaust gases. The difference between a turbocharger and supercharger is simple. The NA engine draws in a large amount of air into a larger space but doesn’t really compress it. The turbo draws in a large amount of air and compresses it into a small space. This is why small turbo engines can produce the same power as larger non-turbo (known as “naturally asipriated”, or NA) engines. That means you can add more fuel – keeping the fuel/air ratio constant – and therefore get more power. Turbochargers and supercharges compress the air that goes into the engine, so more air fits into the same space in the cylinder. The ratio of fuel to air is constant, so the more air you have, the more fuel you can add, and the bigger the explosion and the greater the power. A car engine works by drawing air into a cylinder, compressing the air with its piston, adding fuel and then making a controlled explosion which powers the piston down, rotating a crankshaft and ultimately turning the wheels. ![]()
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