- Dec 6, 2011
Not too long ago I read a comment on another forum that K&N filter worse than standard filters. Can anybody clear this up?
Yes they can. I have played with a flow tester and seen how a Green Air Filter flows better than a KN. I also saw that there is virtually no difference in a stock vs K&N flow. Some parts stores and many truck shows with have testers that you cant change any variable but the filter so you can see the effects.Busterbrown said:For breathability, K&N air filters can't be beat.
Busterbrown said:I purchased my first for my Rainier over the past summer and the filter still looks remarkable clean. I've read 20K between cleanings is all that's required. I've also read posts of long time K&N owners who have run 100's of 1000's of miles on the same filter. For dryer, smoggier climates, oiled filters may not be the most suitable choice. I think those aggressively running offroad would detest the K&N's.
That's enough of a clue there for me, and part of why I took mine off ans discarded it instead of selling it. I want a filter to look dirty. Means it's working. Not to the point of getting clogged, but dirty is good.Busterbrown said:...K&N air filters ... still looks remarkable clean. ...
Mark20 said:I also found the Duramax comparison. The K&N will be coming out of the Silverado this weekend. I just installed it last weekend but haven't driven it much.
Who would have thoought GM would have the best filtering air filter though that comes at a price in terms of flow restriction.
DJones said:What I don't understand is why the filters aren't listed in terms of microns and surface area. Then, as long as the biggest size passed through the filter is smaller than the maximum size of dirt that could be damaging to the engine, we should be fine. A filter with more pleats has more surface area, and therefore more breathability, regardless of particulate size.
PatM said:Take the money you would have spent on fancy filters and change your OEM one more often. You'll save money and end up with a longer living engine and pretty well an equal performance over time.
PatM said:One thing people tend not to think about is that your engine only pulls in as much air as it needs. As long as your filter can handle that there's no such thing as "better" when it comes to airflow.Really, unless you're flooring it at every stoplight or racing at the track you'll see no appreciable difference between filters.
PatM said:A co-worker of mine decided to run GM60 fiberglass filters on an HVAC system (I do buildings) while I stuck with AP40 pleated filters. He was bragging how his lasted six months while mine went three. After one year the supply and exhaust grills in his building were black and horizontal surfaces were very dusty. In my buildings the grills were white and horizontal surfaces had very little dust. I spent three times as much on filters while his building spent 20 times as much on annual janitorial labour and supplies.
HARDTRAILZ said:There are lots of tests out there showing that K&N filters allow more particles through.
DocBrown said:I have yet to see any studies which proved that this filter caused direct engine damage, or that it shortened the life of an engine. Has anyone who used them ran them 100k miles +? I have with no ill effect. I had a '95 'Burb which had one on when I bought it at 97k. The owner said it was on when he bought it at 40k. My dad has the truck now, it still has the same K&N filter with 165k.
We're talking extremely small particles here that will more than likely burn up before they do any damage. Your truck will rust away around you long before the engine dies due to using a K&N filter.
When all is said and done though, I would probably never buy one again. Very little gain for the money, IMHO, unless done in tandem with other performance mods.
SILVOY said:lol if people are worried about gunking up their motors just sea foam it..right? ..
Bartonmd said:The problem isn't "gunking up" the engine with silica (sand). The problem is that it scratches your cylinders, then gets into your oil and makes your oil abrasive to everything it touches (all of your bearings, cam lobes, oil pump, etc.).
SILVOY said:I never said that the tb spacer made a difference with performance..just sounds cool on shift change..ya i get the whole fine partical sand issue and not going to argue about that but wouldnt that take a really long time to take an effect on the motor..take drinking per say..we all do it knowing that later in life our liver will probably have issues but we gamble with it..but when we get that old we dont really care at that point..my thoughts about the k&n CAI..lol..you all make great points though and I will keep that in mind..wrapping the intake is my next project to work on..is there any specific material that I should use?
the roadie said:
SILVOY said:you bring a good point..i should have just left my envoy stock! haha.. is there a better filter that can fit on the end of the k&n? its the filter not the intake that is the killing issue right?
Wooluf1952 said:Right. I believe the stock filter would still fit.
SILVOY said:I tried to put the stock filter on it but the diameter is bigger on the stock filter than the tube..just a food for thought i called k&n (the main source)and asked them about everyones concerns with thier filter that really doesnt filter..they said that they have a "racing filter" which would cause such damage in dusty enviroments cause it is meant for particular vehicles( more like a screen) but that is not the filter they sell with the kits for standard vehicles. They have been around for a long time and never once have they heard of an issue of what you guys are inquiring about..if they sold a product that damaged engines then they would be out of business by now and a crap load of law suites! they run their filters through computer testing before its put out to the public..i see where you guys are coming from and it makes me scratch my head about it but its a "theory" in my opinion..i guess to each is own..
HARDTRAILZ said:Did you bother to read the testing in the provided link?
Of course K/N is not going to say anything negative about their own products.
SILVOY said:yes i get the fact that they will talk up their product. but wouldn't they be out of business plus have law suites against them? there is not one warning lable about ruining the engine.. btw nice rear bumper! Looks sweet!
Mark20 said:Looking at the Duramax link posted above, the Amsoil isn't much better than the K&N.