Ok I am doing intake-assisted crankcase evac and im trying to determine how to mount my slashcut. I have two ideas and was wondering which will produce more vacuum.

What you guys think? Whose got a physics book

 

i think there is no difference. a high pressure flow will produce a vacuum regardless of the orifice, just as long as the orifice is sized.

 

size larger or smaller?

 

i dont think either will, i think it should be cut the other way. what you have there seems to be on the same principle as an air "foil" "deflector" design, as how air is drawn up over a tranny or oil coiler that is mounted parallel to the pavement

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mrbsponge &raquo;</TD></TR><TR><TD CLASS="quote">i dont think either will, i think it should be cut the other way. what you have there seems to be on the same principle as an air "foil" "deflector" design, as how air is drawn up over a tranny or oil coiler that is mounted parallel to the pavement</TD></TR></TABLE>

It does, it works on the bernoulli effect.

here dasher actually quantifies the vacuum such a system can draw: https://honda-tech.com/zero...age=1

 

im not really sure but heres some rambling.

First, consider a baseline of one with no slashcut and perpendicular. Ok now puting a slashcut would create a low pressure spot (shown in green) underneath which would be beneficial. Angling the piece would further exagerate the low pressure zone and also reduce turbulence of the air flowing through the intake and around the piece in the intakes path most likely increasing velocity. My guess would be method b would be create the most vacuum. The low pressure spot and reduced turbulence/increased velocity would create more vacuum pulling the air in. This is just an educated guess but for more information look up the bernoulli effect/principle/law Im interested to see what others have to say.





**EDIT** Damn I was beat to it on the bernoulli effect. I knew I shouldn't have taken so long on those diagrams. lol

 

my hypothesis

 

agreed. thats what i was trying to get at.

 

bump

CAUSE KNOWLEDGE IS POWER!!!

 

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my hypothesis </TD></TR></TABLE>


what would happen if you drilled a hole in either of these tubes? like a nitrous power nozzle?

 

let me dig out my old text books...

what is particular about a round tube is that the drag coeffection isn't really that bad.

the point i was tryint to make is.. imagine if u sucked soda with a small straw, you have alot of suction to pull the soda up... but then u start sucking with a larger straw, you may not have the same effectiveness. Granted, the larger straw maybe enough for the job.