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Old 08-01-2020, 05:37 PM   #291 (permalink)
Vman455
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Quote:
Originally Posted by veloman View Post
The air intake mod is interesting. What about water/moisture entering when it's raining?
The effect of gravity on buoyant gases (such as air) is negligible, so they can travel up a section like the 12" of PVC that goes up and over the support structure before entering the horizontal flex tube and traveling to the airbox. Water, on the other hand, is very much affected by gravity, so water droplets and spray that enter the duct will drain out the open pipe at the low point of the intake. If some droplets happen to make it to the airbox, the filter is on the top of the box, with flow direction up and through the filter, another check on water intrusion.

If the inlet is submerged in water it's a whole different story; then the engine vacuum could potentially pull the water all the way into the intake. I made sure to site the duct high enough to make that unlikely.

A production example is the Challenger SRT Hellcat airbox:



The short tube is open to the front of the car; the filter sits on the top of the box and air flows up and through. The bottom is open for drainage and a secondary intake if the tube is blocked.

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