# Thread: Would air flow be greater if.....

1. ## Would air flow be greater if.....

The 1st 6-8" were 3" at the openning & the other 5ft were 4" to the SC
Or
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.

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.

3. 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.

4. I figured the 4" to 3" tube would be worse. But what about a 3" openning to a 4" tube?

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.

6. Originally Posted by inteljd
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.
I'd call that a funnel! Whats the advantage of doing this?

7. compressing the air

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.

9. Water flowing downhill into a series of sequentially smaller diameter pipes is a little diffent than airflow...

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