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Unread 08-30-2008, 09:01 AM   #1
Jeepster24
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COLD air intake, I mean COLD!

Hey guys, What do you think the benefits would be if I were somehow able to (instead of doing a traditional CAI....which besically draws warm air from the engine anyways.) find a way to come up with a cold air condenser that tapped into my air intake box, I have a K&N flat filter in there now, but i'm wondering what would happen if i could get the air in the colder,.....

P.S. this is theoretical, and I know that i'll have to find a way to power up any such device, but lets ignore that detail for now....

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Unread 08-30-2008, 12:58 PM   #2
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Google for WAES, but itīs more for the turbo engines, because there are the benefites higher (wich makes sense lol), and this is my AFE "Real" CAI Steup:

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Unread 08-30-2008, 01:01 PM   #3
PILL
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You're not going to see any real gains from getting the air cold.
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Unread 08-30-2008, 01:42 PM   #4
elmer_fud
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Originally Posted by PILL View Post
You're not going to see any real gains from getting the air cold.
colder air = denser air

denser air = more air to burn in each combustion cycle

There may not be much of a gain, but there will be some.
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Unread 08-30-2008, 02:46 PM   #5
moparrr07
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cheak out the other cold air intake thread going on right now, i got pics of my setup in there
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Unread 08-30-2008, 10:08 PM   #6
rm2001wj
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Quote:
Originally Posted by elmer_fud View Post
...
denser air = more air to burn in each combustion cycle
....
Actually, it's the gas that burns, not the air. In order to make use of the "extra" air, more fuel has to be injected. The computer, with the aid of O2 sensor input, makes sure that the air/fuel ratio stays about the same. Gas mileage remains the same and so does the power except at higher engine speeds when at WOT.

If cold air made any difference, mileage and power would be a lot different in cold winter than in hot summer.
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Unread 08-31-2008, 04:56 AM   #7
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Let's find out how the Canadians feel about this.

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Unread 09-01-2008, 07:40 AM   #8
footinmouth47
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Ya when it didnt get above 8 * here over 2 weeks my MPG's went down not up so I would say no really cold air does not help all that much. I know im not canadian but the UP is up there.
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Unread 09-01-2008, 07:54 AM   #9
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Generally speaking, for every 10 degree F. drop in air temperature, power will increase by 1%. Here in AZ, anyone who has ever driven on a hot summer day where the temperature is about 115 degrees F. vs a cold winter night with air temps. in the 30s would immediately notice quit a difference in power.

Four Wheeler Magazine did an extensive series of articles some years ago called "Project MPG." They tested stock air intakes, K&N FIPKs, insulated stock air intakes, and insulated air FIPKs. All results were dyno tested and the resulting air temperature drops fell right in line with the predicted power increases.
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Unread 09-01-2008, 08:28 AM   #10
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Yes, but in the interest of full disclosure, it must be mentioned that any power increase occurs at WOT when the O2 sensor inputs are being ignored by the PCM. Also, it is a general rule that dyno tests must be done at WOT as well. At anything less that WOT, the throttle position which is highly variable, sets the power output regardless of cold or hot air.
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Unread 09-01-2008, 08:47 AM   #11
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Right, but the engine still will be making more power at any given throttle angle with colder, denser air vs. hot air.

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Yes, but in the interest of full disclosure, it must be mentioned that any power increase occurs at WOT when the O2 sensor inputs are being ignored by the PCM. Also, it is a general rule that dyno tests must be done at WOT as well. At anything less that WOT, the throttle position which is highly variable, sets the power output regardless of cold or hot air.
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Unread 09-01-2008, 10:22 AM   #12
the88thpianoman
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Originally Posted by Jeepster24 View Post
Hey guys, What do you think the benefits would be if I were somehow able to (instead of doing a traditional CAI....which besically draws warm air from the engine anyways.) find a way to come up with a cold air condenser that tapped into my air intake box, I have a K&N flat filter in there now, but i'm wondering what would happen if i could get the air in the colder,.....

P.S. this is theoretical, and I know that i'll have to find a way to power up any such device, but lets ignore that detail for now....
What engine do you have? On the 4.0 you can significantly reduce the temperature of intake air simply by heat wrapping your exhaust headers, which are located right below the intake manifold, causing it to heat up tremendously. Whether or not you were able to come up with such a system to artificially cool the air, you'd want to have this done anyways.
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Unread 09-01-2008, 10:32 AM   #13
rm2001wj
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Originally Posted by Kolak View Post
Right, but the engine still will be making more power at any given throttle angle with colder, denser air vs. hot air.
True and that's the proverbial "improved throttle response" which many air intake systems claim to produce.
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Unread 09-01-2008, 09:56 PM   #14
moparrr07
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the reason your gas mileage gos down when its cold is because you let your vehicle swit and warm up, i know the 5.2 suck gas on idle
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Unread 10-12-2009, 02:57 AM   #15
ZJ5point2GCL
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Originally Posted by Texas ZJ1 View Post
Let's find out how the Canadians feel about this.

Hunter
Haha ok, I am a canadian, the power & mpg does go up with the cold winter air, but at the same time there is more parasitic power loss in the drive train due to colder thicker gear oils and grease and such. and other electrical losses and engine load not present in the warmth. so the in fall between the 130+ to the -0, there is an increase in power and milage. i do think cold air makes a difference though, because i had an open k&n, that i wanted to make a heat shield for, so i used cardboard to get it right, then i am getting a sheet metal shop here to bend one for me out of SS, but i thought i could just duct tape the cardboard in place while i was waiting for it, and my "mpg-o-meter" went up 1.5, not sure how accurate is is but good enough for me.
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