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2004 to 2008 F-150 and Mark-LT
4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs.


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Old Wed, August 3rd, 2011, 12:22 AM
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Jackpine Jackpine is offline
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Quote:
Originally Posted by jmwilso2 View Post
I dont have nearly the experience Jack does but I fly for a living and have some engineering experience and I'll second all of the above. Even with the 3 way connector there is still going to be a pile of airflow going up that tube which could carry water with it. Pressure differential isnt the issue. Its the fact the air and water are moving fast, rain will fall side ways and even upwards of the wind is blowing hard enough and in the right terrain. And the 3 way definitely doesnt solve the dirty filter issue.

Joe
Joe, my thoughts exactly! But, here in Tucson, we have many dips in the road that fill with water if it rains (admittedly rarely). The "low down" intake without a vacuum break (provided by the "Y" in the reference Longshot posted) would guarantee water into the cylinders.

Now, with the vacuum break, the water would probably not be sucked up at city speeds. But, you hit a big puddle at highway speeds (or the vehicle in front does) and you have big water drops at high velocity going into that intake. I'm not confident that they won't find their way into the engine. Personally, I think a "ram" intake needs to be on top of the hood.

Even then, I'd want some kind of water separator. It's possible, as you probably know, to "drown" a jet engine in a heavy rainstorm. A recip would just be destroyed.

- Jack
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Old Mon, August 15th, 2011, 01:10 PM
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I had the 3-way connector in mine, but I ended up taking the "ram-air" out after a while, I didnt notice any difference without it at all. I did notice that my filter didnt get bugs stuck in it, but the filter sure needed to be cleaned after 10,000 miles of the ram-air. That filter is for sale actually, it is a drop-in K&N, it seemed to flow better than the regular filter, and with the K&N i noticed that the truck responded a lot quicker to throttle inputs.
just my 2 cents on the subject
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