Cold Air Intake (Full Version)

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Cold Air Intake

  

Jewbrad -> Cold Air Intake (2/6/2008 8:28:19 PM)

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

  
betta510 -> RE: Cold Air Intake (2/7/2008 10:08:47 AM)

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.

IXLR8 -> RE: Cold Air Intake (2/7/2008 6:48:29 PM)

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....

betta510 -> RE: Cold Air Intake (2/8/2008 5:49:11 AM)

So in other words, you don't really need to get a CAI because it won't do much? Very well said IXLR8!

MangoInTX -> RE: Cold Air Intake (2/13/2008 4:41:41 AM)

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.

Captansavaho -> RE: Cold Air Intake (3/27/2008 10:59:09 PM)

i have a mopar intake on mine...just stick with mopar...MOPAR FTW

Midnight Blue -> RE: Cold Air Intake (3/28/2008 9:30:54 PM)

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

Excoastie -> RE: Cold Air Intake (4/13/2008 5:13:03 AM)

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

Midnight Blue -> RE: Cold Air Intake (4/13/2008 7:38:38 PM)

When I got my 06, there wasn't a lot of listings yet for the Chargers.  Since I had good luck with a K&N on my wife's car and I like the K&N filters anyway, I went with their FPK (63 series if I remember right).  I wasn't too certain about the open bottom of the heat shield but it seems to do fairly well - expecially with a cat back system and a tuner.

I've been toying with an idea about modding the bottom part of the stock air box to fit in the K&N heat shield and making a gasket for the joint between the air box and the intake pipe in the frame.  This should seal things up better and being plastic rather than metal, it should conduct less heat from the engine bay into the intake air.  I guess could buy a different CAI to replace the one I have, but it wouldn't be as much fun.[:)]

Redbeard

DouglasDarden -> RE: Cold Air Intake (4/20/2008 11:16:16 AM)

When I got mine I just put on the Mopar Cold Air Intake. Bought it from Dodge.

srteatr -> RE: Cold Air Intake (4/22/2008 1:39:36 PM)

Get the Fujita.  It is the best and it actualy pulls air from your air dam.  I got it and it is great.  And about the guy that siad they do not add power...  Well they do not add as much as they claim and it is not normaly at the top end so if you get lets say 293hp at the wheels then you add a cold air intake then you might get 296 or so.... BUT you will see more improvements in the mid to low end range. The problem is not really that you are adding horse power but you the stock air box pulls warmer air from under the hood and the filter and box sucks.  The true cold air arms are much better.  If they do not work then why when you add pipes to a carburator it add horse power?  Why use a tunnel ram on an older V-8?  you are increasing air flow and I have dyno tested mine enough to show there are increases.  I researched the intakes and the Fujita is the best one period.  It was $240 on ebay and most are more expensive and still pull air from under the hood.  I will upload pics soon it looks great!

  

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