Originally Posted by Ed@Ford
A single cylinder sucks in a glob of air ever other revolution of the engine...in other words the flow stops and starts repeatedly. The more cylinders you get, the closer the flow gets to steady flow. When you get closer to steady flow, the resistance to flow drops because you have established a flow pattern....and you don't have to waste time and energy reestablishing the flow pattern (scientists call it a "flow field") over and over again.
Thanks for posting that Ed... I didn't realize that!