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Wheeler
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Discussion Starter · #1 ·
K&N says filter good for 100k (street use),,,earlier maint when used off-road. Anyone have a suggestion on how often they svc their K&N filter based on heavy off-road use ?
 

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If you spend a significant amount of your time offrading, and especially if offroading in dusty or dry conditions, I would reccomend you not use a K&N airfilter, period. A dry genuine filter will trap particulates smaller than 400 grain fineness, however a K&N will pass particulates larger than 200 fineness.
A K&N filter must be, as you already know, oiled, like the old time air filters. In dry and dusty conditions, the oiled element will become plugged very quickly, and the dust will become oily as well, sticking to the element. A dry element can become covered in dry and dusty conditions, but when the engine is shutdown, a significant amount will dropp away from the element.
I know lots of people love their K&N filters, and some so much so as to say that they get an increase in power (Isaac Newton would argue against that succesfully, and he never heard of an internal combustion engine). All of that notwithstanding, they are a poor choice for any regular offroading.
 

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Discussion Starter · #3 ·
Thanks for the advice. I'm too late in terms of having dropped mine in yesterday. I, of course, feel a psychological increase in engine performance. Any disenting opinions out there? Should I put in a regular filter this summer for the trails?
 

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I am awaiting a sample filter from K&N to write up a test on. I have run K&N filters on all my previous cars. What I plan to do is keep the old (it's not that bad) air filter in the Disco so I can throw it in when I go off-roading.


Serg
 

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I've got a K&N in mine just now but I've always been a big fan of "Green Cotton Filters" Thats what I've got in my MG and its been great..

To be honest they are both the same really. I dont get hung up on cleaning scheds, I just clean it when ever I remeber to.. Probably once every couple of months.

Out in the desert we were having to clean the OE paper filters every 30 miles or so.. At the end of every trip anywhere in the sand you could seriously feel the drop in power. It was just a case of taking it out and banging it against the tyre.

Its so easy to clean a K&N you way as well do it after every off road trip :drive:

On the oil filter side of things. I heard that wet filters as used in the series 3s and AFV 432 (Armoured Personel Carriers) were far easier in the dry and dusty environments to keep going.
 

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Debating the benefits or otherwise of K&N filters, is like discussing religion. I use them exclusively and have no issues with them. Doesn't it seem strange, that if they didn't perform as they claim, that they would still be in business?
 

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SCSL said:
Thanks for the advice. I'm too late in terms of having dropped mine in yesterday. I, of course, feel a psychological increase in engine performance. Any disenting opinions out there? Should I put in a regular filter this summer for the trails?
There really is an increase in performance, only when ABSOLUTELY new or after a good clean, if you step on it, the truck picks up a little quicker...but after a while it feels like the old filter again. And I'm guessing that if one has a snorkel, then the Mnt. would have to be done even MORE often. Right?
 

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HAHA, I just reread what i wrote and i make it sound like the K&N filter aslo serves as a Hydrolic Jack Foot pump..HAHA..wherein if its stepped on, the truck will rise quicker as opposed to other filters/foot pumps that slowly raise the truck :lol: I meant if you put that accelerator all the way against the floorpan, you'll feel that extra bit of power and the difference. Ok, so hope i didnt loose anyone on that one..lol
 

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Discussion Starter · #9 ·
Thanks for all the advice. I'm thinking of keeping it in due to engine sluggishness w/ 33's & swapping it out for OE when I go off road as it's pretty damn dusty in Colo.
 
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