Boost pressure refers to the amount of atmospheric pressure that surpasses the normal pressure a manifold can take produced by the supercharger or turbocharger during operation. Turbo or supercharger will carry more air and pressurize them before entering the engine. Forcing more air into the engine combined with more fuel mixture makes greater explosion inside the cylinders to generate more power, making the engine more efficient. Modern turbocharged vehicles enhance fuel economy and produce more power by metering the fuel and air with extreme precision. Thus, a bigger explosion in the combustion chamber comes with more power.