What is Boost?

Question

So if my engine was a 3.3 liter engine which is naturally aspirated. I put in a turbocharger and I got 10 psi from my turbo. How much moore air is that? How much more air is 1 psi? How does the boost measurer work?

Answer 1

Boost is the extra air that the turbo is supplying to the engine. Instead of a vacuum or negative pressure at the intake, the turbo will provide up to 10 lbs of extra pressure at the same point. Atmospheric pressure is close to 14.7 lbs. So with 10 lbs boost you are close to 2 atmospheres. The boost gauge is no more than a pressure gauge reading pounds of pressure. good luck.