Re: For anyone doubting the airflow benefits of fog-light CAI ("R" Kelly)
| Quote, originally posted by cloaked » |
| Well put it on in the rain and drive through a nice puddle of water then report back since you have all the answers lol |
Dude, seriously, read a science book if your going to spout your mouth off in my thread. I answered this previously.
| Quote, originally posted by LTA » |
| I'm not too worried about one other the other getting plugged up. I'm more interested in the possibility of rain water or snow ending up in the box and what that might do. I know the filter is there but if the CAI adds potential for more water getting in the box than it was desinged for it might be a problem, no? What's your experience in heavy rain and snow been like? |
| Quote, originally posted by "R" Kelly » |
The air box/filter is about 2 feet higher in elevation than the intake hose at the fog light grill, so for ANYTHING besides air to even make it to the filter inside the airbox it has to defy some gravity and make a couple of turns.
The only way for there to be enough of a vacuum in the CAI line do defy this gravity and make the turns is if the main intake was plugged IMO (or if you were running a PHENOMENAL amount of boost).
Even if the CAI line was under water so it plugged, the engine would just suck air in through the normal intake (like it was designed to do), which should be above water (if it isn't, you have bigger problems). You would have to have so much vacuum in the air box that the main intake couldn't satisfy it, so it starts inhaling water from the CAI line.
Perfect example, put one end of a straw off to the side of your mouth and keep your mouth open. Insert the other end into a soda. No inhale really hard. Did the soda climb the straw? Only if you close your mouth almost all the way (e.g. only if main intake plugs).
Now, take that same straw and stand off to the side of a fan, but put the end of the straw in the air stream. You can still breath normally through your mouth, but you will have extra air forcing its way into your mouth through the straw, pre-emptively satisfying any air requirement from heavy breathing as a result of exertion (a slight RAM-AIR effect).
Something to note, the main intake is essentially level with the airbox, so you are more likely to get snow/water (bee) in through there because there is no gravity to fight, they just have to ride the air current. |
| Quote, originally posted by JimLill » |
| In my original design, one of the reason I brought the added duct in on the cover was that it makes the line 2X as long and gravity will keep more of the water out... |
Jim, since you only ran a 2" hose instead of a 2.5", if there were a "vacuum" effect in the CAI tube, wouldn't it be stronger in yours because it has a smaller diameter? Again, this is more of a ram air system, NOT a vacuum system unless the main intake gets completely plugged.
And wow, since I used 32" of hose line, I have a hard time believing that you used twice as much line. Certainly not 32" to get around the side of the airbox.
Also, with your placement, if water did make it's way into the box from the CAI line, it would spray onto the top of the filter and possibly fill up the the top grooves (again, this would never happen, but we are dealing in silly theorecticals here). Feeding air into the bottom means if any water did make its way in onto the bottom of the filter, gravity would drain it out of the drain hole in the corner.
Finally, I can make my airbox stock again valve and all in 5 minutes. Hard to do with a hole drilled in the side
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| Quote, originally posted by Sailrace » |
Running in the rain, and theoretically even submerging that inlet in a puddle, although i'm not sure why you would do that (what puddles are you driving through that are that deep anyway) wouldn't do anything at all.
Consider the actual physics of it...here's a good test for you - go out and lunch and order a glass of water. Ask the waitress for two straws. Put one straw in the water, one straw outside the glass, and the other ends of both in your mouth. Now try really hard to suck water up out of your glass. You won't be able to, because the straw that is outside the glass equalizes the pressure by sucking in air. Therefore, no water in your mouth.
Same principle holds true here. As long as the main intake isn't submerged, then it won't matter if hte CAI is or not, there wont' be enough pressure to suck water into the system.
I woulnd't worry too much. |
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