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ANSWERS: 2
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A turbocharger increases your car's horsepower by forcing more air into the engine. More air gives you more oxygen to combust, therefore giving you a stronger explosion in the cylinder, and more power. Turbochargers use the force of the engine's exhaust gases to spin a turbine which, in turn, forces cool air into the intake. -
At i's simplest, turbochargers harness the energy of the engine's exhaust to spin a turbine which is connected to a similar turbine in the intake tract of the engine. This intake turbine forces a larger volume of air into the cylinders of the engine, allowing for more fuel to be burnt, which produces more power. Proper choice of turbine sizes and "trims" allow for a turbo to be either a laggy thing that produces big power at high RPMs, or a less powerful but more responsive piece of equipment with a lower peak power but a broader powerband. Contrary to popular belief, not all turbos deaden throttle response;some are so quick to spool up that they feel just like a normally-aspirated engine except for the increased power. Most of your decent turbocharged vehicles will mount intercoolers, as will any properly built supercharged engine, and here is why. Any time you compress air, it heats up, and since hot air is less dense than cooler air, there is horsepower to be made from cooling the air coming out of the intake side of the turbo before it enters the engine.
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