K&N INTAKE

[Gearhead]

By coincidence , today , I began tearing down the 2.5 in the 94. It's  had the air raid intake on it for a year and a half , the filter is still pretty clean . I washed  it with K&N air filter cleaner , it's set aside to dry , then will get re-oiled .
 What's relevent , as far as this discussion goes  is the throttle body , it's clean and will need nothing in preparation for re-assembly of the engine.  This one is a mall crawler,  Hammer down all the time  but it is a pavment princess.

What's wrong with the 2.5 ?  , nothing at all to do with the intake , it's been run hard &  run low on oil repeatedly ( female driven) .

The 88 YJ   see's  use as a part time DD  , trail use and whatever else I can  dish out. I


The K&N that's on the 88 YJ  , it's been cleaned once since I bought it and could use another cleaning here real soon , the water repellant sock does prolong the service interval.

[slimbeam]

My '88 YJ I use a K&N in a stock air cleaner assembly which is great for keeping the element dry, maybe have a little less power but it gets me around town ,up and down the hills, and through the mud and water. just my 2 cents

[esi]

not how I understand it. The more dirt comes in, the less amount of oil there is to clot it. Thus the dirtier it gets, the more garbage it lets in.

I had read about this a while back, this is what I found today, There are dry filters made by AFE they produce the charge that catches particles a different way

1. Dirty & turbulent air enters the filter
2. Multi-layer cotton gauze oil impregnated material
3. Dirt stays on the outside layers of the filter
4. Special oil produces a static charge to the cotton media
5. Epoxy coated Marine grade aluminium wire mesh
6. High performance is achieved by the clean & smooth air stream that enters the engine

[Bnine]

They arent bad if you stay out of the crap and keep an eye on them.  I dusted my original engine and washed out all my bearings with a drop in KnN.

Last year at ACE Brink couldnt drive over 30mph because 1 dusty day clogged his brand new KnN so bad is nearly sealed shut.

Thats the problem with an oiled filter in a dusty enviroment. The oil attracks the dust and causes clogging. Which of course eliminates any of the additional airflow you might have had when it was originall installed.

[jrhockey03]

I don't know if anyone talked about this but you can get those little prefilter bags teh go over your cone filter. Not sure if they restrict flow or how well they work, they are water resistant as well.

[Pookapotamus]

apparently they do offer the dry bag filter cover. i have not yet looked into how much they cost but i am pretty sure if you look at the k&n website and find the number of the one you are looking for that napa can order it in for you.

[esi]

The pre filter bags work very well. The only thing is they cut airflow back to what the stock filter is, so It kind of defeats the purpose of the high flow filter

[cLAY]

Usually though if you are doing a CAI system with an open filter element it will be larger than what the stock filter is so you're still ahead...