05-19-2007, 06:41 PM #1
Would air flow be greater if.....
The 1st 6-8" were 3" at the openning & the other 5ft were 4" to the SC
The 1st 6-8" is 4" & the rest is 3" to the SC?
I know 4" all the way is the ticket but i'm curious.
05-19-2007, 06:53 PM #2
From my limited understanding the 4" opening to a three 3'' would yeild better results.
Sort of a funnel effect...compessing the air...speeding it up prior to entry into the SC.
05-19-2007, 07:03 PM #3
- Join Date
- Oct 2005
I don't think a funnel effect is going to do much good. The SC wheel is sucking in a lot of air already, so just keep feeding it a large volume of air. If you go from 4" to 3" you are going from a larger volume of air to a smaller volume of air for the SC to use. I think sticking with the 4" intake the whole way would be your best bet.
05-19-2007, 07:08 PM #4
I figured the 4" to 3" tube would be worse. But what about a 3" openning to a 4" tube?
05-19-2007, 07:09 PM #5
FYI - I'm in the process of installing a 3" for about one foot after the Supercharger then stepping to a 4" for about two more feet then a 6" for the remainder of the four feet to my hood.
05-19-2007, 07:11 PM #6
05-19-2007, 07:26 PM #7
05-19-2007, 07:35 PM #8
Anyone remember the movie Pale Rider?..the scene...Sean Penn's character is explaining to the young hottie how the water monitors work...
"up the valley we got the creek falling into a length of 3' pipe...that runs down hill then goes into a 2' pipe. That goes down hill till it goes into a 1' pipe and so on....by the time the water hits the monitors I've got 200psi..."
...or something to that effect.
05-19-2007, 07:45 PM #9
Water flowing downhill into a series of sequentially smaller diameter pipes is a little diffent than airflow...
05-19-2007, 07:48 PM #10
Bernoulli's principle wouldn't apply?Bernoulli's principle gives us a place to start in finding a mathematical expression for the force of air resistance. Air is a fluid. Your car moves through it. Daniel Bernoulli (1700-1782) looked at fluid flows as stream lines forming a tube like strands of string cheese. Using the law of mass conservation, he characterized the relationships between pressure, fluid speed, its density and whether it was flowing up or down hill.
Bournouli's equation is
pr + pv2/2 + pgh = constant.
Last edited by VaRedneck; 05-20-2007 at 09:49 AM.
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