Originally Posted by willwren
Originally Posted by llBlazin_llLo
You can actually flow more in a smaller diameter because you develop VELOCITY. Laminar is what allows you to move any fluid in an efficient manner. Bigger is NOT always better.
Thanks for the lesson on velocity and laminar
So wouldn't a large diameter short intake be easier to pull air in then lets say a smaller diameter long intake?
I'll answer your question with two more:
What flows better? A stock airbox with a drop-in performance filter, or a custom intake with cone filter?
I'll answer that... But your question compares apples to oranges.
Firstly, you flow faster, not more
in a smaller diameter,
because, ( Mr. Bernoulli, and his Venturi again.... ) as speed increases.... pressure drops, decreasing volume.
10 cars @ 50 MPH, or 10 cars at 90 MPH is still 10 cars. ( the pressure equivalent here would be elapsed time )
Cars moving faster , yes. .....More cars...no.
It is the custom intake with cone filter, that flows more efficiently.
..........Because of the laws of nature.
It'* kind of like saying "which is easier to walk thru an empty hallway,
or one crowded with people.."?
Stock intake has restrictions : inlet area , baffles, and the big killer...
turbulence, from the accordian style connector.
Custom intake with cone filter, eliminates these restrictions. Large inlet, no baffles, no accordian.
It also supplies a denser flow (cooler= more per volume unit) of air.
Of course it flows "better".
But.......... not necessarily at a greater volume, in any given instance.
It'* volume depends on the ratio of ambient pressure density, to manifold pressure density.
The greater the difference the larger the flow. Again... the reason for */c'*,
is to increase this ratio.
But this doesn't address the question of flow volume and pressure that the
larger/smaller pipe would exhibit, under normally aspirated conditions.
Given the same unobstructed pipe design , a larger pipe would flow more volume at
the same (atmospheric) pressure as a smaller pipe.
Or, if the volume were constant, the larger pipe would flow at a lower pressure.
Otherwise, by your intimation, instead of large diameter exhausts, people would be running soda straw size exhaust pipes, and restricting intake, for better flow..
I'm with "llBlazin_llLo" on this one.