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K&N air filters

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thermidorthelobster:

--- Quote from: "Range Rover Blues" ---Paper ones get cloggged up much worse than K&N
--- End quote ---

Yeah, but that's because the K&N filters let all the rubbish go straight into the engine!

Cut a big hole in your paper filter, and that won't clog up either  :P

thermidorthelobster:

--- Quote from: "smith335" ---so what are the benefits of a k&n filter over a paper one?
--- End quote ---

In theory the K&N lets more air flow through because the holes are bigger, but it still traps the junk because of the oil coated surface.

In practice, it doesn't seem to still trap the junk.  A lot of it seems to go straight through.

K&N also say their filters don't clog up with use.  If they're not catching any of the junk, then of course they're not going to clog up.

There used to be a pdf of K&N filters compared with paper filters and others knocking around on the web somewhere, but I can't find it any more.  It showed that the K&N was a bit of a waste of time.

Range Rover Blues:
Hoarses for coarses I guess.  K&N are the generic term we use for washable oiled filters and there are better brands.  For every study that shows they are useless another shows they are the bee's knees, I've been into classic fords for years and they are the business, you can tell the extra airlflow they free up because the carbs need re-tuning, often with bigger jets.  I like them because they are washable and at the price I paid then after 4 paper elements I'm at a loss.

Not every one likes them, I wouldn't put an exposed K&N on a Land Rover, but mine lives in the airbox and connects to the snorkel.

Oh yeah and when the LPG backfires I don't have to sweep it up :wink:

Absolutely no problems with the MAF sensor either.

smith335:
a mixed bag here,
if there is the risk of crap getting into my engine then ill stick to the paper filters.
yes you cant clean them ,but you could just change them more oftern.

mmmm confused now,(dont take much)

thermidorthelobster:
I should also mention, my K&N needed cleaning WELL before the recommended interval - it was only a few thousand miles.  And the MAF on my P38 went the same way as the one on the Disco.  I can't be totally sure it was the K&N filter that did it, but it seems quite likely.  (The MAF on the P38 was about 400 quid to replace...)

I don't dispute you get more airflow, but you'd get more airflow by taking the filter out altogether.  On a Land Rover I don't think it makes any measurable difference to the driveability of the vehicle.

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