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The compression ratio is the ratio of the volume of the cylinder and the combustion chamber when the piston is at the bottom, and the volume of the combustion chamber when the piston is at the top. Automotive engineers can improve fuel efficiency and fuel economy by designing engines with high compression ratios.
In the case of boost, the answer is a resounding yes. As we told you in Blower Basics (Part 1) , boost is the amount of air pressure created by your supercharger and is the result of a combination of factors: engine displacement, blower displacement, and blower drive speed.A proper amount of boost is goodâvery good.tatic compression ratio is the compression ratio that is built into your engine. When you combine your engineâs static compression with boost pressure, you get the âeffective compression ratio.â This effective compression factor was established to help determine your engineâs safe boost level.