So you are saying that forced induction which only increases the velocity of a set density of atmosphere entering a closed cylinder through valves or ports that are only open for a preset amount of time doesn't make up for the lack of natural pressure at sea level of 14>7 psi? Density is the amount of oxygen content in the atmosphere as a percentage. It is the same "density" at 5000' as it is at sea level but it doesn't have the pressure to move it into a low pressure area such as a cylinder or even your lungs. What does eventually fill them is still the same density as far as oxygen content but there is less total volume because of less pressure/velocity pushing it in there. The more cu in of "atmosphere" the more oxygen but the actual density (ratio) is the same. Atmosphere is not 100% oxygen.
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Today's Featured Article - Memories of an IH Super A When I was ? up to 10, I worked on my Papaw's farm in Greeneville, TN every summer. As I grew older (7), it was the thrill of my day to ride or drive on the tractor. My Papaw had a 1954 IH Super A that he bought to replace a Cub. My Papaw raised "baccer" (tobacco) and corn with the Super A, but the fondest memory was of the sawmill. He owned a small sawmill for sawing "baccer" sticks. The Super A was the powerplant. When I was old enough (7 or 8), I would get up early and be dressed to
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