[tx_medic]

hoping I hadn't overlooked this, but has anyone considered or established the CFM requirements for the engine's intake when building snorkels?

 

[tx_medic]

well the factory airbox hole is what,,a 1 1/2 at its biggest where it comes outta the airbox..

heres the thread to my new completed airbox for those intrested..it turned out fairly nice but better the next time..i might start selling them..just the snorkel tho not the airbox..

homebrew snorkel..
http://www.jeepforum.com/forum/showthread.php?t=810246

The obvious limitations are with the ports and valves, I'll have to get into that when I'm not drnkng at a pool hall... but my concern is that over distance, both diameter and surface area will affect the volume of the column of air entering the throttle body. The requirements of the engine are at least the displacement times the max rpm's. So a 2.5 x 5k is in excess of 440 cfm (cubic feet per minute).

my question was if anyone has actually established a minimum.... I'm guessing 600+ cfm to be safe, and then allow the exhaust to be the limiting factor on the other side of combustion.

 

[tx_medic]

Ok, so 441.4 CFM would be the minimum requirement per the 4-cyl engine at 5,000 rpm... I think. When it comes to physics I'm pretty sure that the actions of a column of gas are about as complex as it gets. So add enough margin of error as well as room for a port job and exhaust upgrade or modification I'd say 600 to 700 CFM is an adequate base for calculation of intake requirements...

the calculations for a column of air passing through your snokel however... I'm not sure how to derive them at this time.

I'll do a bit more research on the manor and see what comes up. The idea is to establish a safe (from debris and moisture) intake that is not restrictive. Of course, filters, bends, diameters, surfaces are all factors.... and most of this is a bit over my head so i'll have to learn as I go.

My goal is to create an intake solution that is not the limiting factor, thus allowing room for modification/improvement further down the line.

 

[tx_medic]

oh, i'm sure a safe bet is to mimic the aftermarket snorkels in proportion, and I don't have a problem with your snorkel (looks bad a**), i just want to make sure if I do anything to my intake that i'm not limiting my power.