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Old 06-10-2015, 09:05 AM   #1
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K&N air cleaner assy

Does this really help the V10 E450? Increase power, or just noise? Better fuel economy? Any check engine alarms?

Feedback please Thanks Larry
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Old 06-10-2015, 09:45 AM   #2
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A K&N air filter swap bought me 0.1 - 0.2 mpg improvement so not statistically important. You can get the same improvement by replacing a dirty air filter with a clean one. If the intake you're looking at is a sealed unit and still pulls air from outside the engine bay and doesn't use metal tubes that heat soak then the intake won't do any harm but if this is one of those filters on a stick that suck air from the engine bay then sucking in the hot air will actually hurt performance.

Custom intakes typically only help in situations where large air volumes are needed and the stock intake and filter are not up to the task. Think turbo or supercharger. Our rigs don't typically run more than 4500 rpms so they don't approach the air volumes that would be required for one of these boxes to make a big difference. You can pick up some additional air flow by installing a free flowing air filter but be warned that there are folks out there that have seen issues with the fluid from an excessively oiled lifetime filter fouling the sensors in the throttle body so if you're worried about that then best to stick with swapping out your stock air filter every 10 - 15K miles or once every few years.

I have seen these boxes swapped in on 600+ hp race motors with large cooling fans blowing into the intake and the net change on the dyno was only a few horsepower above 5000 RPM. To feel a difference from a modification you typically need to see a gain of 20 hp or more from the change. On the open road the force of the air coming into the intake might exceed the force of a dyno fan but I doubt it would be enough to make a difference on one of these V10s.

One thing you will notice if you do swap the intake is more intake noise. Many folks hear that and believe they are making more power. In reality all that has happened is the resonator on the stock intake is gone resulting in more noise.
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Old 06-10-2015, 09:58 AM   #3
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I would not put a K&N device on anything not even a fred! Oh I see that you have a fred but I still would not put it on.


Cummins engines would void your engine warranty at one time if a K&N device was found on the engine. They are the cheapest manufacture in the market place today and they make very poor quality sub-par products. But they do spend an awful lot on advertising.


Just my $0.02
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Old 06-10-2015, 10:38 AM   #4
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I just swapped out the original air filter with a K&N and was truly surprised by the difference. I have to put my scangauge back on to get real numbers, but I am sure I am getting more than .2 mpg. I also noticed a difference in the power. I am basing this on trips to one of the parks in the mountains. It's only about 60 miles away but has some steep grades. We have made this trip many times before and have kept records. I usually get about 6.5 mpg on the way up and 8 on the way back. I expected to fill up on the way back using the gas discount points we accumulated, but I was still at half a tank and had to wait till this past weekend to fully use the 30 gal max. There is also a 5 mile grade that I usually run over 3000 rpm @ 55 mph. Passing another truck was never an option before, but this time I found I was running about 2800 rpm and when I came up on a slow mover, I was able to easily pass them. We made the same trip this past weekend and had comparable results. I can't think of anything that changed other than the filter, so I am going to attribute the difference to it. As far as the oil fouling the sensors, I have had a K&N in our Acadia for 3 years and have never had an issue.
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Old 06-10-2015, 01:19 PM   #5
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k n filter

Have used in all my vehicles for years and no problem.
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Old 06-10-2015, 01:44 PM   #6
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The big problem that people do with a k/n filter is over oiling it between cleanings. A cleaner kit should do at least 4 or 5 cleanings and you only put a thin coating of oil on them. Other wise they will cause the sensors to get oil on them and cause problems. But if you also between cleanings spray the air sensor with sensor cleaner these filters will improve milage and performance.
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Old 06-10-2015, 02:17 PM   #7
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Quote:
Originally Posted by Jim34RL View Post
I would not put a K&N device on anything not even a fred! Oh I see that you have a fred but I still would not put it on.


Cummins engines would void your engine warranty at one time if a K&N device was found on the engine. They are the cheapest manufacture in the market place today and they make very poor quality sub-par products. But they do spend an awful lot on advertising.


Just my $0.02

The Moss agreement in the states overrides the manufacturer canceling out your warranty where as the manufacturer doesnt supply free air filters.
I currently have used an ARRIAD air filter system and performance exhast on our F150 for better torque. lightly oiled has no effect on sensors and dealer has seen it on both my 2011 and 2013 Ecoboosts.

they did however blame me for electrical issues with battery saver mode reoccuring and the wiring for my LED lights in the grille were not even attached.

we have a K and N filter in our car and increased mileage by 10%
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Old 06-10-2015, 02:26 PM   #8
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KN filters improve mileage by allowing more air to enter the engine. To me, that means the filter is allowing larger particles thru it than the stock air filter. Larger particles of dust, dirt, etc. I'll stay with the factory filter. Am I wrong?


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Old 06-10-2015, 02:36 PM   #9
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K&N test results

Attached is a test from a few years ago. Although the info is somewhat dated, if it were easy to prove the claims made by aftermarket air intakes why can't those test results be published/found? If it were that easy to make more power, why wouldn't the factories do it?

If anybody disagrees with this study, please provide unbiased test results to prove it wrong.

K&N Air Filter Review - Debunking the Myths (and why OEM is better)
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Old 06-10-2015, 03:45 PM   #10
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GM is doing it now. They have brought out there own cold air intake system that you can have installed at the dealership. My old truck was bought with the k/n system installed by the dealership so the argument of the manufactures not getting on board is old school and the argument of it affecting your warranty is also. its your own opinion weather to use or not.
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