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Cold air intake or just K&N for better fuel economy?


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67 replies to this topic

#21 OFFLINE   akirby

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Posted 31 October 2012 - 08:47 AM

Switch back to paper filter and see if mileage goes back down. Then do another round to see if the gain is consistent.







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#22 OFFLINE   Feirstein

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Posted 31 October 2012 - 03:13 PM

So you changed several items at one time and still want to believe that it was the K&N filter that made the difference.

#23 OFFLINE   WWWPerfA_ZN0W

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Posted 31 October 2012 - 03:19 PM

The fact that there was a difference at all is worth investigating. A logical approach like akirby's would be my request to lend the results some weight.

#24 OFFLINE   DFallenAngel

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Posted 06 February 2013 - 08:20 PM

Interesting...



#25 OFFLINE   Edgieguy

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Posted 06 February 2013 - 09:45 PM

Flame if you must, but I received a K&N air filter as a Christmas gift after purchasing my 3.7L Sport. I carefully kept track of every fill-up and saw a gain of 1-3mpg. I removed it, I lost the same mpg, I re-installed and saw my gain again. My friend who owns a performance shop told me he uses them all the time and to not listen to all the non believers. I'm a believer and its worked for me. Try it yourself and see how you make out.


I did just this, but alas it made no difference because if you're not willing to try it out first hand, you're bound to bash it with no experience.

#26 OFFLINE   David Mengel

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Posted 18 November 2015 - 10:26 AM

I know this is a pretty old thread but I wanted to get on here and find out if anyone was using a cold air intake. I just wanted to reply to the notion that more air into the engine means more fuel used. That notion is pretty ridiculous. Any time you make an internal combustion engine "breathe" easier, you increase it's efficiency. A fuel injected car will operate at a set fuel mixture point. That is true. It is the downstroke of the piston in the engine that draws air into the motor. When you make it easier for the engine to do that, (with a higher flowing filter) you reduce the amount of energy wasted on drawing that air in. That is why a turbo or supercharger increase power while adding efficiency. They remove that drag on an engine. The same holds true for exhaust. The freer flowing the exhaust, the less waste of energy pushing the spent fumes out. I just wanted to find out if anyone replaced the air intake tube from the filter box to the throttle body. 


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#27 OFFLINE   specialk4523

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Posted 18 November 2015 - 10:33 AM

You will just get a nicer sound when you drive no major improvements if car isn't tuned..

#28 OFFLINE   akirby

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Posted 18 November 2015 - 10:49 AM

I know this is a pretty old thread but I wanted to get on here and find out if anyone was using a cold air intake. I just wanted to reply to the notion that more air into the engine means more fuel used. That notion is pretty ridiculous. Any time you make an internal combustion engine "breathe" easier, you increase it's efficiency. A fuel injected car will operate at a set fuel mixture point. That is true. It is the downstroke of the piston in the engine that draws air into the motor. When you make it easier for the engine to do that, (with a higher flowing filter) you reduce the amount of energy wasted on drawing that air in. That is why a turbo or supercharger increase power while adding efficiency. They remove that drag on an engine. The same holds true for exhaust. The freer flowing the exhaust, the less waste of energy pushing the spent fumes out. I just wanted to find out if anyone replaced the air intake tube from the filter box to the throttle body. 

 

More air into the engine always requires more fuel - no way around that.

 

"Breathing easier" is also a myth.  The only thing that matters is the volume of air and the density (oxygen content).  A freer flowing intake, filter and exhaust simply allows MORE air to enter and exit the engine.  An engine is nothing more than an air pump - the more air you can get in and out the more power you can make.

 

There is no "drag" on the engine based on the intake or exhaust.   It's strictly the oxygen content of the air that gets pulled in when the valves open.



#29 OFFLINE   macbwt

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Posted 18 November 2015 - 08:25 PM

Akirby is a direct vendor for AEM and K&N air filters.  For more information just PM him and he will help you out. ROFLMAO

 

More air into the engine always requires more fuel - no way around that.

 

"Breathing easier" is also a myth.  The only thing that matters is the volume of air and the density (oxygen content).  A freer flowing intake, filter and exhaust simply allows MORE air to enter and exit the engine.  An engine is nothing more than an air pump - the more air you can get in and out the more power you can make.

 

There is no "drag" on the engine based on the intake or exhaust.   It's strictly the oxygen content of the air that gets pulled in when the valves open.


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#30 OFFLINE   rwf78155

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Posted 18 November 2015 - 09:51 PM

I did the K&N Cold Air Intake on my Edge Sport and noticed no gain in mpg or power.  

What I did notice is that the Cold Air Intake is very noisy when accelerating !

If I had to do it all over Id just get a K&N filter and pocket the $200


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#31 OFFLINE   David Mengel

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Posted 19 November 2015 - 11:59 AM

I agree that an engine is just an air pump. All I was stating is that a less restrictive system allows that pump to operate more efficiently. My point is just that reducing the amount of negative pressure created by the engine when drawing in air takes some of the load off the engine. An engine will always use a certain amount of air and fuel to achieve a certain RPM, the harder an engine has to work to reach that RPM determines the amount of air and fuel needed. I've used K&N filters in my explorer and my Hemi Ram. I did notice improved throttle response and slight gains in mileage. I drive 60 miles a day, back and forth to school. Even the slightest gain would be to my advantage. I do also consider my driving habits. I get about 20 mpg which isn't bad but I'm always looking for that little extra. Thanks for the info though. I'll keep that in mind. 



#32 OFFLINE   akirby

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Posted 19 November 2015 - 12:23 PM

You're overstating how hard the engine has to "work" to pull in air.  When you remove intake or exhaust restrictions you simply allow more air into the engine and that's where the extra power comes from.  Not from reduced load.  And that difference only shows up at WOT or close to it.

 

You can put a cloth diaper in the airbox and still get better mpg - somebody actually did that test.

 

But I'm not going to continue to argue about it.  Believe whatever you want to believe.

 

As for the K&N providing better fuel economy, if that were true then K&N would have hard data posted all over their website to support it just like they have dyno runs showing hp gains.  They don't.   Draw your own conclusions.



#33 OFFLINE   macbwt

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Posted 19 November 2015 - 08:35 PM

Speaking of diapers I need one because I am afraid I will pee myself I am laughing so hard. 



#34 OFFLINE   wilso00000

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Posted 18 March 2016 - 04:04 AM

I have a 2010 and cut the air box off and put a k&n cone filter in its place. They make one with the exact ID needed to fit snugly around the factory tube. I think it's 3.25 inches, I don't remember, it's been awhile. I used a hose clamp to secure it on and zip tied it to the batt cable. I at some point will be making a heat shield from some sheet metal to block the engine heat and make some caps for the air silencer thing. I can't say I noticed any difference and really wasn't paying attention because I know it improved air flow and that's all I was going after. I also recently got a sprint booster for the throttle response delay and having felt the difference that makes, I will not be returning it. It does nothing for performance but still a must have for the way I drive. Haven't messed with the exhaust yet but will be very soon.

#35 OFFLINE   wilso00000

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Posted 18 March 2016 - 04:09 AM

I keep it about 80 mph on the highway and have a heavy foot and consistently average a little over 21 mpg
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#36 OFFLINE   wilso00000

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Posted 18 March 2016 - 04:14 AM

I forgot to mention also that the exhaust is noticeably louder than stock.

#37 OFFLINE   WWWPerfA_ZN0W

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Posted 18 March 2016 - 06:22 AM

Make sure to use some insulation on the heat shield, preferably on both sides, but definitely on the inside (towards the filter).  The heat shield should ideally seal to the hood when the hood is closed, so you can experiment with weatherstripping for that.

 

How about videos/pics of your setup as it progresses?  Would be cool!


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#38 OFFLINE   wilso00000

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Posted 18 March 2016 - 02:59 PM

I plan on posting some stuff. Just joined the forum and will be away from my vehicle for a few more weeks

Edited by wilso00000, 18 March 2016 - 03:00 PM.

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#39 OFFLINE   macbwt

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Posted 18 March 2016 - 10:17 PM

Akirby? nothing?  Oh well you can lead them to water.......



#40 OFFLINE   wilso00000

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Posted 19 March 2016 - 07:14 AM

Yeah akirby. Give some criticism. I'm all for it. And please if anybody would like to give me advice or their opinion I'd like to know it. Thanks




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