Ok...if allowed, this is something I learned during my undergrad at Iowa State studying internal combustion engines...
For a 2 liter engine, it is theoretically possible for the engine to "inhale" bring in two liters of clean air for every two revolutions. This would be equal to an intake efficiency of 1.0...so for every CC of displacement, it is bringing in that much air. Obviously if we have turbos, or superchargers, that ratio goes well above 1.0...and can exceed 2.0, and even more.
So...for a NA engine...what is possible?
Can a NA engine achieve 0.8, 0.9. 1.0, or even above 1.0?
For a 2 liter engine, it is theoretically possible for the engine to "inhale" bring in two liters of clean air for every two revolutions. This would be equal to an intake efficiency of 1.0...so for every CC of displacement, it is bringing in that much air. Obviously if we have turbos, or superchargers, that ratio goes well above 1.0...and can exceed 2.0, and even more.
So...for a NA engine...what is possible?
Can a NA engine achieve 0.8, 0.9. 1.0, or even above 1.0?