Cold Air Intake
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Cold Air Intake - 2/6/2008 8:28:19 PM
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Jewbrad
Posts: 5
Joined: 2/6/2008
Status: offline
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I have a 07 dodge charger R/T and would like to know what would be the best cold air intake to place on this car and will it effect my warranty
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RE: Cold Air Intake - 2/7/2008 10:08:47 AM
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betta510
Posts: 87
Joined: 6/4/2007
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It doesn not affect your warranty. I have a K&N CAI but I believe one of the best one's to go with is the AFE stage2. A lot of people mention the AirHammer too but I'm not sure where to get that one from.
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RE: Cold Air Intake - 2/7/2008 6:48:29 PM
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IXLR8
Posts: 373
Joined: 12/27/2005
From: Katy, TX
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I am really not trying to be a stick in the mud... but, according to my diagnostic software, the intake temperature is within 1 degree of ambient temperature in my car. The cold air theory is flawed for a number of reasons. First of all the air is not colder. Does it improve airflow? No, not really... wait, let me explain. The engine horsepower & torque curves are a curved line. If you measure the amount of area under curve both before and after the installation, you will notice very little difference. What about the 20 hp boost claims? If you overlay one curve on top of the other you will notice the shape changes. I will admit that at a certain point the peak hp is better. But you accelerate using the entire rpm range. If you have the same area under the curve, you have the same overall power. If you compare the CAI to an OEM system you will notice loss in certain rpm ranges on the CAI system.
Another thing that is overlooked is air velocity. That big fat intake actually slows the air down, just ask Bernoulli. What your engine wants is really fast air, because it fills the cylinders more quickly. The OEM system is optimized over a wide range of conditions, and does a superb job.
Also the fuel mangement on the 5.7 L is not managed by a Mass Airflow Sensor. It has a series of known air/fuel mixtures under a variety of conditions in a look up table in the computer. This in combination with the oxygen sensor determine the air fuel ratio. If you change the physics of the airflow, the computer will use the wrong numbers. It is based on known system.
Let the flames begin....
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RE: Cold Air Intake - 2/8/2008 5:49:11 AM
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betta510
Posts: 87
Joined: 6/4/2007
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So in other words, you don't really need to get a CAI because it won't do much? Very well said IXLR8!
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RE: Cold Air Intake - 2/13/2008 4:41:41 AM
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MangoInTX
Pat & Amandas Wedding Fund Contributor
Posts: 2676
Joined: 4/10/2006
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I believe this is RevHammer's (<- guess you could call him the father of the AirHammer) web site www.hammermotorsports.com, it appears to be down for renovations.
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RE: Cold Air Intake - 3/27/2008 10:59:09 PM
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Captansavaho
Posts: 239
Joined: 8/20/2007
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i have a mopar intake on mine...just stick with mopar...MOPAR FTW
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98 dodge neon sohc atx
06 dodge charger 5.7
99 suzuki 125 rm
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RE: Cold Air Intake - 3/28/2008 9:30:54 PM
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Midnight Blue
Posts: 164
Joined: 6/4/2006
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If your intake temp is within 1 degree of ambient then your CAI is operating properly. Cold is a relative term. Except when you first start in the morning, ambient air is always lower than underhood temp because of the heat generated by the engine. Unless you refrigerate your incoming air, it will never be colder than ambient. If you are in a Southern clime in the summer, the best you can hope for is 90 to 100+ degrees going down the intake pipe.
Cold air is denser than hot air and that is where the power increase happens. Denser air contains more molecules (including oxygen) and this adds to the efficiency of the combustion. The velocity changes that you talk about take place in the intake manifold, not the CAI. Unless the engine is supercharged, air is sucked into the engine and the large tube reduces restrictions allowing the engine to draw in as much air as it needs. This is not as much of an issue with the LX cars but on my wife's 300m, it was breathing through a hole in the fender about 1 1/2 inches in diameter with the stock filter box. Breathing through a larger aperture with a CAI made a noticeable change in that case.
I always take power increase claims with a grain or two of salt. After all it is marketing.
Redbeard
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RE: Cold Air Intake - 4/13/2008 5:13:03 AM
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Excoastie
Posts: 3
Joined: 4/13/2008
From: Bossier City, LA
Status: offline
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Which CAI is the "best" is a matter of opinion. What the above posters has said makes sense to a degree, but it's not what the original poster was looking for. Personally I think the AEM brute force is about the best, it's got an excellent heat shield that does a decent job of keeping the engine bay's hot air out of the intake, at the same time allowing more cooler air to flow. I had a K & N Typhoon on my Magnum, and the heat shield just wasn't cutting it, as after the engine warmed up the car would often ping as both the cooler are hot engine bay air were mixing and confusing the hell out of the computer.
I don't know if there is any true horsepower gain with any CAI, but I did notice that there is an improvement in the sound (that alone makes it worthwhile for me) when you romp on it. Also in the Charger, there was a slight noticeable increase in performance, (this might all be in my head, but the wife noticed it too).
Just my two cent worth
Exco
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