K&N INTAKE

[esi]

other brands such as.....?

AEM
Green Filter
Injen
Volant
Trueflow
Airaid
Banks
AFE

[Bnine]

I use Trueflow. Expensive, but significantly higher filtration then cotton, better flow, and more capability to retain water if it takes a small drink.

[FullMetalJeep]

The more dirt thats in a K&N the better it filters.

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.

[esi]

The more dirt that packs in the smaller the spaces are for dirt to go through,  less air but more filtering.

[FullMetalJeep]

The more dirt that packs in the smaller the spaces are for dirt to go through,  less air but more filtering.

yea, but it's not the cotton that filters it's the oil. when the oil runs out, by soaking into to much dust/dirt, there is none left for filtering. So any space is just that, a space for contaminants to bypass the filtering oil. The cotton just acts to hold the captured material.

[Sandman]

cool blue has some pretty good cold air intakes, if you decide to go cool blue close your eyes and open your wallet.

[Spinalguy]

Everything i have read shows hp gains in the NON useable rpm range

i used to use K&N on my jeep. Never again. My throttle body was toast from oil blow by.
How much oil is too much, enough, too little? Good luck!

i only used stock paper filters on my rubi. Its the only way i would go.

My truck and wifes car have the cold air bling but they don't see much mud.
My dirtbike uses a oiled filter but it gets cleaned and re applied a lot.

[Bnine]

My dirtbike uses a oiled filter but it gets cleaned and re applied a lot.

Also the foam used in them is a much more efficient filtration media then the cotton stuff commonly used by KnN and other "cold air" types.

[Sandman]

what about those edelbrock style filters?
got the mesh n foam in it

[Gearhead]

Ooooooooooooo


After reading all of this , I'm afraid now ,    afraid I've ruined every vehicle I 've owned  since the seventies by running a K&N filter in pretty much everyone of them.


NOT


They work , it's that simple   and   they are servicable.

Paper is ok , till it's saturated with water , oil treated cotton guaze is far more forgiving in wet conditions.





To prolong the service interval on my YJ  ,and  to capture some of these engine wrecking chunks of dirt and rock ,  to lessen the likelyhood of water droplets getting by the filter I use a K&N rain sock / pre filter / cover thingy.    I never plow into a water hole at speed , that's just asking for a hydrolocked engine.    On this one , the intake is up high enough that , my distributor is fully submerged first , which would kill the engine any ways . Stalled / dead in the water   ?  ,  would also be the case if I bought one of those gay snorkels and sawed a hole in a fender to install it that on there   , HA  , NEVER gonna see a snorkel on anything  I drive.


I guess the dyno at work is wrong  , and K&N filters suck and I should hang my head in shame for replying to this discussion.



I like them

[Evil-Jeep]

well after reading the posts I figured I would ad my 2cents..... the article a while back in 4wd or offroad magazine did a great comparison over several brands, testing in 2 ways power gains and by the amount of dust held in each filter..... If I remeber correctly K&N was middle of the pack for both tests but came in alot cheaper. I believe Air Raid was near the top in both tests. I checked online and could not find the results however I did come across this test that was done on a 4.0 and the results were interesting.

http://www.fourwheeler.com/techarticles/engine/129_0902_jeep_4_liter_engine_upgrades/engine_rebuilding_equipment.html

[Spinalguy]

Ooooooooooooo


After reading all of this , I'm afraid now ,    afraid I've ruined every vehicle I 've owned  since the seventies by running a K&N filter in pretty much everyone of them.


NOT


They work , it's that simple   and   they are servicable.

Paper is ok , till it's saturated with water , oil treated cotton guaze is far more forgiving in wet conditions.





To prolong the service interval on my YJ  ,and  to capture some of these engine wrecking chunks of dirt and rock ,  to lessen the likelyhood of water droplets getting by the filter I use a K&N rain sock / pre filter / cover thingy.    I never plow into a water hole at speed , that's just asking for a hydrolocked engine.    On this one , the intake is up high enough that , my distributor is fully submerged first , which would kill the engine any ways . Stalled / dead in the water   ?  ,  would also be the case if I bought one of those gay snorkels and sawed a hole in a fender to install it that on there   , HA  , NEVER gonna see a snorkel on anything  I drive.


I guess the dyno at work is wrong  , and K&N filters suck and I should hang my head in shame for replying to this discussion.



I like them

And this dyno at work. Give me the #'s and at what rpms the performance is seen.
The Performance reality vs myth has been covered ad nauseum on the net for years.
i believe in summary, that performance gains are seen at rpm ranges that we do not USUALLY run our rigs at. So, not really a performance gain is it?

As for your years of wrecking engines? it is probably true but you never looked at the throttle body to see how much oil gets through the filter,
OR
you have the right formula for how much oil you spray on the filter after you clean it. The sock is a good ides for real dusty conditions (following a convoy on the 940 comes to mind)

But you are a Gearhead and i am most certainly not. lol.

[Evil-Jeep]

well I am completely unable to find the article on the amount of dsut each filter is capable of holding, however, Jpmagazine did this tech bit not to long ago...   http://www.jpmagazine.com/techarticles/engine/154_0804_jeep_wrangler_intake_shootout/index.html

[Gearhead]

Tom  , the dyno at work is for bikes only.  I have tested hundreds of motorcycles with and without K&N filters ,  the combinations are endless, on a motorcycle they work.   Having never dyno'ed a Jeep , I can not confirm any losses or gains.

What I can cofirm is  , on my 94 YJ  , which has the 2.5  , that motor liked the cold air intake kit . That one is an  Air raid , is baffled to shield the inlet from high temps , it's pretty much the same thing as a K&N kit.   It's less restrictive , that's a given , where , in the power band the performance difference actually is matters not to me , a 2.5 can use all the help it can get.  

And the cool sound !   like turning the air cleaner cover upside down on dads  Chevy  Impla.


My stroked  4.7 YJ   , it just seemed like , the thing to do , that one is a K&N   , it's also baffled and shielded from engine heat , measurable power difference ?  , who knows , there's so much other Whoo  Haw done to that engine .  Now that Jeep deserves to go on the dyno but hasn't yet.
Did I mention the cool Whaaaaaaa engine sound ?

[Spinalguy]

ha,ha,ha...
sound is kewl Jeff!