Homemade Ram Air!
not neccesarily for deep water but it keeps water from splashing up into the filter and it puts the air intake up higher above any dust that might be. plus it acts as a ram air intake. and looks bad @$$ lol
Hall Of Fame
Joined: Jun 2005
Posts: 14,228
Likes: 19
From: Riverton, UT
Just a heads up to those that have done this mod:
I did this too. I live in Portland, OR where it rains approx 8 months out of the year. When driving on the highways in Portland, when you can actually go 55mph+ due to traffic... the roads are like solid water mist from ground level to your windshield height.
I used an oiled filter (aFe) and the filter was fine, but when I looked inside my oil fill (where the PCV hose is located), I found caramel colored sludge. Not a lot, but enough to make me remove the CAI and go back to stock.
I was getting so much ram air that some water was going right thru the filter...
I changed the engine oil a couple times at 500 miles after that. I didn't see that my oil was contaminated, but it made me think twice about the CAI and rain...
I did this too. I live in Portland, OR where it rains approx 8 months out of the year. When driving on the highways in Portland, when you can actually go 55mph+ due to traffic... the roads are like solid water mist from ground level to your windshield height.
I used an oiled filter (aFe) and the filter was fine, but when I looked inside my oil fill (where the PCV hose is located), I found caramel colored sludge. Not a lot, but enough to make me remove the CAI and go back to stock.
I was getting so much ram air that some water was going right thru the filter...
I changed the engine oil a couple times at 500 miles after that. I didn't see that my oil was contaminated, but it made me think twice about the CAI and rain...
Now if you don't have enough oil on the air filter then I could see SOME vapor getting into the system, however that would be "operator error" and not a design issue. Oil floats on top of water, so the water will drop into the air ox and drain through one of the many holes in the bottom. Put it back on and drench the filter in the charge oil and get yourself a K&N just for the back up.
Registered User
Joined: Sep 2011
Posts: 9
Likes: 0
From: Clackamas, OR
I've seen the normal amount of "foam" in the oil fill and this was much more...
I had drilled a 1.5" drain hole in the bottom of the air box housing and when I took the lid off, the entire lower housing was drenched. All of the ribbed areas were filled with water.
I just put 2+2 together and decided the CAI was too risky for me...
I had drilled a 1.5" drain hole in the bottom of the air box housing and when I took the lid off, the entire lower housing was drenched. All of the ribbed areas were filled with water.
I just put 2+2 together and decided the CAI was too risky for me...
Veteran
Joined: Sep 2011
Posts: 351
Likes: 0
From: Gloucester, Mass
in fact there is a TSB on the 4.7L motor that might fix your particular issue.
THE ULTI-MOD
Joined: Jan 2007
Posts: 19,797
Likes: 36
From: Union NJ
not true, with the number of turns and the length of the intake any ram air effect is negligible, and in fact i would even go so far as to say a snorkle will decrease performance similarly to the way that the home made ram air increases it.
why do you say that?
THE ULTI-MOD
Joined: Jan 2007
Posts: 19,797
Likes: 36
From: Union NJ
because every time the air needs to turn (most snorkles follow the angle of the windshield frame, so the air goes in, turns 100+ degrees, follows that down, turns 45* turns 90* then follows the 'normal' intake flow) the air is slowed down and the flow rate decreases, its all pretty simple fluid dynamics