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K&N Performance Air Filter


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76 replies to this topic

#61 OFFLINE   SPL Tech

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Posted 11 January 2015 - 02:09 AM

 I have to wonder though, if FE gains in excess of 20% are available by simply changing the air filter, why wouldn't the car companies put them in at the factory? 

Because they dont. Air filters rarely improve MPG. They are most useful at wide open throttle. Why risking damaging the MAF sensor to save maybe $40 in filters over 120000 miles? If you have to have the dealer replace that sensor, dont be supprised if they try to charge you $1000. If you went to vegas and bet $1000 on slots and the machine said you have some chance of winning $40 and some chance of loosing $1000, but nothing in between, would you take that bet? Pretty shitty bet to take...









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#62 OFFLINE   Adrian_L

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Posted 12 January 2015 - 08:20 PM

Oh right......the quarts and quarts of oil flying off the K&N filter into your MAF sensor.   I'm surprised nobody has tried to cook french fries in there.

 

Another urban myth.   


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#63 OFFLINE   Bugblndr

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Posted 12 January 2015 - 10:43 PM

In my garage is a 2000 Trans Am with 90,000 miles on it, 87,000 of them with a K&N filter on it. My previous car to that was a Grand Prix with 60,000 miles on it. I never had a MAF issue with either.

IMO, issues are caused by over oiling the filter and reinstalling the filter without letting the filter have time to properly absorb the oil. I've known a couple of people who have set MAF related codes because of that. A QTIP and some rubbing alcohol fixed their issue.

Edited by Bugblndr, 12 January 2015 - 10:46 PM.


#64 OFFLINE   Adrian_L

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Posted 13 January 2015 - 03:40 PM

I believe K&N are still waiting to see the first sensor with any K&N oil on it.   There's pretty conclusive info on their website about high pressure testing of their filters.  



#65 OFFLINE   ptjones

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Posted 14 January 2015 - 04:54 PM

Because they dont. Air filters rarely improve MPG. They are most useful at wide open throttle. Why risking damaging the MAF sensor to save maybe $40 in filters over 120000 miles? If you have to have the dealer replace that sensor, dont be supprised if they try to charge you $1000. If you went to vegas and bet $1000 on slots and the machine said you have some chance of winning $40 and some chance of loosing $1000, but nothing in between, would you take that bet? Pretty shitty bet to take...

Actually Air Filter System can make a big difference, look at Post #27,29,37 and 40 on this thread. As far as the CMAX goes I didn't notice much, less than a mile per gallon. I'm not disappointed I did it, every little bit helps. :) 

 

Paul



#66 OFFLINE   Adrian_L

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Posted 14 January 2015 - 05:12 PM

Atta boy.  If I do decide to put one in myself I'll take your advice and wear gloves. 

 

Adrian



#67 OFFLINE   ptjones

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Posted 14 January 2015 - 05:38 PM

Atta boy.  If I do decide to put one in myself I'll take your advice and wear gloves. 

 

Adrian

Don't get in a rush, you have to push ,pull, twist and bend a little to do it. Use strong gloves, alot of sharp spots under there, I didn't and payed for it. LOL :gaah:

 

Paul



#68 OFFLINE   rotozuk

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Posted 28 January 2015 - 05:06 PM

For those that have a K&N and some miles on it, try this simple test. Pull off the filter and rub your finger down the filtered intake and see how much grit you find. 

 

I used to use K&N on all of my cars, but after finding dirt in all of my intakes (4x4s that saw a lot of dirt roads and street cars) I stopped using them. They were not doing the one thing they are supposed to do, FILTER.

 

As far as a K&N messing up a MAS, I doubt it. You do not need to keep the filter dripping with oil. Though I have seen more than a few owners that would oil the filter way too often. 

 

By the way, you need to check the flow of an oiled filter after it has been in use for a few thousand miles. They need to collect some dirt (in the oil) to reach full filtering capability. LOL A lot of folks fail to do this when they flow test them. Correct me if I am wrong, but K&N used to warn users not to clean them very often as you would wash away the important dirt. 

 

I'll be sticking with the good old paper filters. No issues with those. They are cheap, they work, and they will not void warranty.

 

-Wayne



#69 OFFLINE   ptjones

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Posted 29 January 2015 - 10:12 AM

For those that have a K&N and some miles on it, try this simple test. Pull off the filter and rub your finger down the filtered intake and see how much grit you find. 

 

I used to use K&N on all of my cars, but after finding dirt in all of my intakes (4x4s that saw a lot of dirt roads and street cars) I stopped using them. They were not doing the one thing they are supposed to do, FILTER.

 

As far as a K&N messing up a MAS, I doubt it. You do not need to keep the filter dripping with oil. Though I have seen more than a few owners that would oil the filter way too often. 

 

By the way, you need to check the flow of an oiled filter after it has been in use for a few thousand miles. They need to collect some dirt (in the oil) to reach full filtering capability. LOL A lot of folks fail to do this when they flow test them. Correct me if I am wrong, but K&N used to warn users not to clean them very often as you would wash away the important dirt. 

 

I'll be sticking with the good old paper filters. No issues with those. They are cheap, they work, and they will not void warranty.

 

-Wayne

Have you tried replacing your filter yet?  It is a very annoying job and I scratched my hands doing it. At this point I'm leaning towards just leaving the K&N filter in there until I get rid of the car, the filtering should get better as time goes by. LOL :)

 

Paul



#70 OFFLINE   rotozuk

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Posted 29 January 2015 - 06:23 PM

Have you tried replacing your filter yet?  It is a very annoying job and I scratched my hands doing it. At this point I'm leaning towards just leaving the K&N filter in there until I get rid of the car, the filtering should get better as time goes by. LOL :)

 

Paul

Ha! I haven't even lifted the hood on my C-max. I have all of 200 miles on it. I hope to god I won't have to wrench on this car. I bought new so I wouldn't have to. Trust me, I have done my share of wrenching on other vehicles, even built my own from the ground up, all suspension, chassis, etc. Cutting, bending, welding.. You get the idea. Now I don't have to. :)

 

-Wayne


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#71 OFFLINE   ptjones

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Posted 29 January 2015 - 06:40 PM

I have a little different perspective with 89K miles on mine. LOL :)

 

Paul



#72 OFFLINE   Adrian_L

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Posted 29 January 2015 - 08:08 PM

With my luck, I'd probably electrocute myself on the HVB doing DIY work.  I'll stick to fiddling on my GMC camper.

Would like to try to install one of these in an old Karmann Ghia (or VW Thing, or MGB GT)

 

http://www.evwest.co...products_id=220

 

But that's a post for another time...


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#73 OFFLINE   techman05

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Posted 09 January 2016 - 08:49 PM

Have you tried replacing your filter yet?  It is a very annoying job and I scratched my hands doing it. At this point I'm leaning towards just leaving the K&N filter in there until I get rid of the car, the filtering should get better as time goes by. LOL :)
 
Paul


I didn't have any issues removing mine. Very tight in and out though. The intake is the most pain and the path into the engine popped off on bothe ends. I didn't though notice the sensor was a squeeze clip the first few times and I ended up breaking the plastic clip (they don't have a harness with metal clips).

Watch the you tube videos first and you should have no issues. Just remember the screws are secure screws and have an electric drill to reduce the monitany with them.
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#74 OFFLINE   ptjones

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Posted 10 January 2016 - 01:47 PM

I have 121K mi. now using an K&N filter most of them. Did Blackstone Oil sample analyst and everything was fine and I'm not using any oil. :yahoo:

 

Paul 


Edited by ptjones, 10 January 2016 - 04:22 PM.


#75 OFFLINE   jackalopetx

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Posted 04 May 2016 - 09:36 PM

I'm surprised no one has posted this... K&N filters let more dirt through. They are less good at filtering. That's how they're designed. K&N have much less surface area, so to compensate the pores are bigger. 

As if common sense weren't enough, this has been proven by empirical testing.

http://www.nicoclub....oem-filter.html

 

kn-v-oem-3.jpg


Edited by jackalopetx, 04 May 2016 - 09:39 PM.


#76 OFFLINE   Plus 3 Golfer

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Posted 05 May 2016 - 07:33 AM

I'm surprised no one has posted this...K&N filters let more dirt through.

I agree. Thanks for posting the pic and link.

 

See post 6 (over 3 years old) which references the Spicer study although the link to the study is now broken. 

 

Obviously what the study neglects is what the downside of passing more dirt into the engine with respect to future engine maintenance / repair. Does it "really" matter with respect to the engine that the K&N is say only 97% efficient.  I suppose it also depends on where one lives as some areas have a lot more dirt in the air than others.  I always thought the Phoenix area had clean air.  Well after spending 9 recent years there, it's the "dirtiest" place I've lived (lots of dirt in the air from the desert areas).  I suppose most areas that receive little rain would be like that. 

 

I used a K&N in my 1982 MB 300SD for over 250k miles.  The only benefit of the K&N that I observed was that I saved $ over buying replacement paper air filters.  The downside - dealing with the oily K&N filter. :)

 



#77 OFFLINE   ptjones

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Posted 05 May 2016 - 12:15 PM

I actually tested K&M vs Factory filters on Post #27 and I have one in my CMAX with around 100K mi. on it.   The Test filter is for a chevy silverado, It looks like our is about as big. :)  The K&N filter has a lot more surface area as compared to factory filter.  It don't think the K&N helps MPG's much, I do think it helps HP and it will last for ever. My old filter wasn't that dirty.

 

Paul








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