Maf screen removal the pros and cons?
#21
Originally Posted by maybe2fast
I took mine out of my LN3 and there was for a day a few engine "coughs" but it runs great now, I felt a difference small but take what you can get!
GMtuners.com has flowbench data with and without the screen
GMtuners.com has flowbench data with and without the screen
#22
Senior Member
Posts like a Corvette
Joined: Jul 2004
Posts: 1,256
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From: Bolingbrook, IL Location: Clarkston, MI
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.
#23
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.
What flows better? A stock airbox with a drop-in performance filter, or a custom intake with cone filter?
Why?
#24
Senior Member
Posts like a Corvette
Joined: Jul 2004
Posts: 1,256
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From: Bolingbrook, IL Location: Clarkston, MI
Are you following this or are you lost? Is that not what I said?
The one with less of a restriction will flow better.
I'm taking about you saying that a 3" intake will out perform a 4" intake. Come on?
So wouldn't a large diameter short intake be easier to pull air in then lets say a smaller diameter long intake? :?
I'm taking about you saying that a 3" intake will out perform a 4" intake. Come on?
#25
I'm taking about you saying that a 3" intake will out perform a 4" intake. Come on?
Have you ever heard the term "Venturi Effect". The venturi effect theory is used on race exhaust headers merged collectors to improve exhaust scavenging in which they neck down the exhaust collectors. The same principle is used with carburetors. Air passing through an hourglass-shaped venturi accelerates as it passes through the narrowest part of the venturi then slows down and expands as it emerges on the other side. This expansion creates a pressure drop, in effect siphoning air into the low-pressure side of the venturi and drawing more volume through the venturi.
So, can you see the picture.
#27
Originally Posted by ssei1995
I'm taking about you saying that a 3" intake will out perform a 4" intake. Come on?
.
Race headers use the pulses from each exhaust stroke, timed, by the length of the tube,
not a venturi effect, to scavenge the exhaust. ( i.e. a "Tuned" header)
Necked down "collectors" would add .......a restriction, and a build up
of back pressure, and subsequent reduction in flow.
.....Let 500 cars thru 100 toll booths........... = no traffic backup
.....Let 500 cars thru a single toll booth ......... = big traffic backup.
The speed of the fluid increases, not the volume.
Bernoulli'* law states as pressure decreases, speed increases. and vice versa.
You won't increase volume. (IOW you can't get something for nothing.)
Try it yourself...
http://hyperphysics.phy-astr.gsu.edu/hbase/pber.html
In a carburator, the venturi is siphoning fuel, not air.
( i.e. Something else is added to increase the total volume flow.)
Reducing the tube size (with a venturi ) makes the flow faster, but at a lower pressure, and not in greater volume.
For greater volume, the fluid (air) would need to be compressed... hence the addition
of super chargers, and turbo chargers........
(And they said my staying in school was a waste of time... )
#28
Originally Posted by Charliebonn
For greater volume, the fluid (air) would need to be compressed... hence the addition
of super chargers, and turbo chargers........
(And they said my staying in school was a waste of time... )
of super chargers, and turbo chargers........
(And they said my staying in school was a waste of time... )
#29
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.
So wouldn't a large diameter short intake be easier to pull air in then lets say a smaller diameter long intake? :?
What flows better? A stock airbox with a drop-in performance filter, or a custom intake with cone filter?
Why?
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.
#30
Originally Posted by jwikoff99
Originally Posted by Charliebonn
For greater volume, the fluid (air) would need to be compressed... hence the addition
of super chargers, and turbo chargers........
(And they said my staying in school was a waste of time... )
of super chargers, and turbo chargers........
(And they said my staying in school was a waste of time... )
Now that you have decreased the volume, for the sake of argument.. by half...
You can now "fit" twice as much in the same given space, at the same time.
That... equates to an increase in volume flow!
If you take a sponges measuring 2x2x2, and compress them into cubes 1x1x1,
how many cubes of the 1x1x1, will fit in the volume of the original at the same time?
Answer = 8 cubes (or a compression ratio of 8 - 1)
That'* an increase in volume x 8.