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Boost vs CFM
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<blockquote data-quote="JAJ" data-source="post: 17031860" data-attributes="member: 131874"><p>CFM is the determinant of horsepower. The airflow in pounds per hour determines how much fuel in pounds per hour the air can burn. Air flow determines fuel flow and the fuel flow determines the engine's power output. Simple as that.</p><p></p><p>"Boost", on the other hand, is a measure of inefficiency. It's better thought of as "backpressure". It's a measure of the resistance to flow caused by stuff obstructing the path the air takes through the engine. If two blowers are making the same backpressure on the same engine at the same RPM, and there's no change in the intake charge cooling, the two will make the same power at that RPM.</p></blockquote><p></p>
[QUOTE="JAJ, post: 17031860, member: 131874"] CFM is the determinant of horsepower. The airflow in pounds per hour determines how much fuel in pounds per hour the air can burn. Air flow determines fuel flow and the fuel flow determines the engine's power output. Simple as that. "Boost", on the other hand, is a measure of inefficiency. It's better thought of as "backpressure". It's a measure of the resistance to flow caused by stuff obstructing the path the air takes through the engine. If two blowers are making the same backpressure on the same engine at the same RPM, and there's no change in the intake charge cooling, the two will make the same power at that RPM. [/QUOTE]
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