Uses

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 When it comes to adding a turbocharger or supercharger to a vehicle there are a couple main reasons as to why this would be a good idea. The first reason is to race. Many of the race-cars if not all of them use turbochargers solely because they are always at a high RPM which means turbo lag won't be an issue and the fact that a turbo is run off of the exhaust fumes thus creating no engine power loss while constantly obtaining boost. However, race cars that use superchargers have the advantage of the constant boost no matter what RPM.

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Lastly, many turbochargers and superchargers are used in engines to help with the economy. Almost all if not all semi-trucks have big engines with huge turbos. They use turbos for the same reason as most race cars which is because there is no engine power loss to spin the turbine thus giving maximum amount of power. This helps the economy in the sense that the semi trucks can have more horsepower and torque which means they can pull more stuff to stores or locations faster and more efficiently. Even though they are diesel motors and have about 2000% more compression in the piston than regular gas engines meaning they are unstoppable when it comes to pulling weight; however diesel motors have extremely slow acceleration and top speed due to the torque output and turbos help prevent the issue.
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