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Doesn't it suck up only as much as engine speed and throttle position allows? No, throttle position and engine load determine the quantity of air consumed. It can be quite hard to understand at first how a naturally-aspirated engine can ingest different quantities of air at the same RPM. Here's what the Engine Management Fundamentals chapter of the ...


Air flow is purely based on throttle position and engine revs on a normally aspirated engine, adding a charger (turbo etc) adds complication. With the throttle fully open, every inlet stroke is going to take the maximum amount of air (and therefore fuel) into the cylinder. This air intake can then be multiplied by the engine revs. If the throttle is not ...

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