K&N vs. Uni

[tommydogtv]

Which one will give more performance a k&n or a uni airfilter. I want to buy one but i cant decide

[Cody_300ex]

UNI!! :macho

[logan]

eather one

[Matt756]

UNI

uni is better IMO but theres no way anyone will be abl;e to tell the difference excpet on a dyno

[mustang93]

bet ya the K&N flows better. Half the guys that flame the K&N do so because they consider this oiled:
http://pictureposter.allbrand.nu/pictures/mustang/100_0048.JPG

:blah:

[quadmx7]

i have a k&n on my 400ex and have had no problems with it. as long as u keep it clean it flows really good and works really good. but i am considering switching to a uni.

[HondaMan222]

K&N is better, beacuse it has way more flow, and uni gets a bunch of crap it and clogs

[boogiechile]

k&n will flow more and thus make more power but it will not filter out the fine dust that the uni will. there is a reason they get clogged, they work at catching dirt. I would pick the uni uless you ride sand dunes only.

[Juggalo]

you will not notice a power difference between the 2. K&N may flow better than uni but its so minimal that you would never notice the difference. with that said, might as well just get the uni because its cheaper and filters better.

[gimpbzkt400ex]

Uni

[cals400ex]

Originally posted by mustang93
bet ya the K&N flows better. Half the guys that flame the K&N do so because they consider this oiled:
http://pictureposter.allbrand.nu/pictures/mustang/100_0048.JPG

:blah:


oh heck, that is plenty oiled. :D those bugs in there have to stop plenty of the dirt and dust.

[redroost85]

I have always been a K&N guy. But I am gonna give Uni a shot for various reasons, leading to the filter change. Flow is good, but I don't want too much schiz flowing by, lol!;)

[gimpbzkt400ex]

Originally posted by redroost85
I have always been a K&N guy. But I am gonna give Uni a shot for various reasons, leading to the filter change. Flow is good, but I don't want too much schiz flowing by, lol!;)

I have never had anything get through my Uni ... My intake boot is always clean and looks brand new inside of it.

[redroost85]

:rolleyes: That is one of the reasons for my switch to Uni.:o

[wilkin250r]

I'm partial to K&N... :devil:

[cdalejef]

K&N does flow good but they also pass more particles than a properly oiled foam filter. K&N's don't like water either. :(

[Pappy]

Originally posted by wilkin250r
I'm partial to K&N... :devil:

what is that lil boy doing with them filters:confused:

[ewalker302]

Just do a search you will find lots of threads about k&n letting dust in the intake boot, none about uni doing the same thing.

Manufacturers put foam filters on theit products for a reason.

:bandit:

[hondarider2006]

I have been running a K&N for about an year now....and I am thinking about switching to Uni. I ride in a lot of dusty places, and the k&n is not to great at filtering dust. I think in the winter I will run a k&n, seeing as how I ride in snow and I am not all that worried about snow going through my k&n with outerwears:eek2: I have been running an open airbox lid all winter without any problems. This summer I will be running a Uni though;)

[mustang93]

Originally posted by Pappy
what is that lil boy doing with them filters:confused: :D :D if thats a boy I must be gay:eek2: :D :D :D

[BIGRED400]

I tryed K&N with every type setup to keep dirt out of my intake boot, oiled with 1 Outerwear, with more oil w/2 Outerwears, finally got a oiled Foam Cover from GT Thunder over 2 Outerwears with K&N oiled good...still had dust in my intake boot.made the switch to UNI....no problems.Florida can get awful dusty at times. The worst thing you can do is to let dust get inside your motor, ask any engine builder........K&N may be good for some area's but not mine.:)

Originally posted by BIGRED400
I tryed K&N with every type setup to keep dirt out of my intake boot, oiled with 1 Outerwear, with more oil w/2 Outerwears, finally got a oiled Foam Cover from GT Thunder over 2 Outerwears with K&N oiled good...still had dust in my intake boot.made the switch to UNI....no problems.Florida can get awful dusty at times. The worst thing you can do is to let dust get inside your motor, ask any engine builder........K&N may be good for some area's but not mine.:)

Did you put grease around the metal rim of the K&N that goes INSIDE the airboot???

[BIGRED400]

Tryed it with wheelbearing grease and without, did like the way the K&N flowed but could'nt stand the dirt inside the intake boot, but it does get awful dusty dry season here,,Thanks BIGRED400:D

[MOFO]

UNI for my quad
K&N FIPK for my truck (because it does not see high dirt conditions)

[Toadz400]

I've ran a K&N with outerwear and I switched to UNI in no time...I was getting too much fine dust into my intake to be using a K&N. And yes it was oiled properly, I made sure it was soaked in oil all around. I've always trusted UNI and it's never let me down on either of my machines.

[James Parent]

Did you put grease around the metal rim of the K&N that goes INSIDE the airboot???

I have to agree, ive never had dust in the intake boot, ive always put greese around the seal and kept it well oiled.. no complaints here, it also looks pretty :D Chrome:D
i've had no experience with uni, and don't understand what's wrong with the k&n

[zlam27]

i think im gonna try a twin-air or no-toil foam filter. the twin-air is nice because the 2 stages of foam filters are bonded together (harder to clean but easier to deal with and supposedly better flow). i have a K&N right now which i was going to keep for winter, but why keep it for non-dusty conditions when the foam wont get dirty then either (no cleaning all winter). i think im going to make the switch. its still impossible to find a fool-proof airbox/filter setup.

i will have an outerwears lid, outerwear, and a foam filter.

BTW: i put my old UNI filter (the outer one of the 2) over my K&N and that seemed like a good idea. i dont know, there are just too many combinations......

zach

[cals400ex]

i probably wouldn't get the twin air. it is practically the same filter as stock but smaller and a different color.

[hondaexryda]

UNI - mx/xc

k&n - dune ride

[kerby400ex]

Uni is the way to go.

[Goat397]

ive always run k&n on all my machines and have never once had a problem , i think some people on here would just rather listen to what someone says rather than try it out for themselves , id pick the k&n over any of um

[ewalker302]

If you want to pay 2-3 times as much for something that dosent do as good a job (filter) as stock then get a k&n.

And whats the deal with greasing the intake boot? Is that just an excuse for k&n's letting in dust? ---- because I've never seen a thread on here saying that dust got around their uni like that.

Seems to me it would have to be super loose to get dust in there. The big hose clamp sealing the filter to the boot does the job just fine without grease, for me anyway.

I guess if I just paid $50 for a filter I would say it's great too.
:bandit:

[James Parent]

sigh ^
hater

what ever happend to, you get what you pay for?

[nakomis0]

Wow, lots of guys for Uni...

K&N flows better than a Uni, period.

With an outerware I feel K&N has less maintenece... also. Its less messy and easier to clean... I'm sure some disagree but, just how I feel.

Uni does protected better. ...K&N will let in dust.... I don't care about dust.. whats dust really gonna do?

,... the little that it lets in (if any), I would never worry about.

If rode in super dusty conditions all the time, maybe, I would consider a UNI, and then it would be a tough choice just because you would have to clean that messy thing alot.

I understand you can get an Outerware for a Uni, but its still a messy to deal with, when a K&N you just hose off and re-oil. A Uni ussually in some part of the cleaning , re -oiling process you gotta squeeze it and get your hands oily, and if you have to squeeze it in an Outerware its gotta be worse.

IMO

[04EXdude]

Who makes the White Bros Powerfilter? Is it the samething as a Uni?..............:confused:

[BIGRED400]

http://www.performanceoiltechnology.com/k&nbitesthedust.htm

[BIGRED400]

What's strange is, if I read this right a filterskin helps a Foam Filter flow better than a K&N

http://www.bigcee.com/filtertest/

I like both K&N and UNI, I am trying to neutral in researching testing, for my area (dusty) I just prefer UNI

[BIGRED400]

http://www.knpowersports.com/facts.htm#WORD

[BIGRED400]

http://www.unifilter.com/performance-facts.htm

[James Parent]

http://www.knpowersports.com/images/afffig3.gif

Duh just look at the picture.. no dust getting through!
lol

Originally posted by ewalker302
If you want to pay 2-3 times as much for something that dosent do as good a job (filter) as stock then get a k&n.

And whats the deal with greasing the intake boot? Is that just an excuse for k&n's letting in dust? ---- because I've never seen a thread on here saying that dust got around their uni like that.

Seems to me it would have to be super loose to get dust in there. The big hose clamp sealing the filter to the boot does the job just fine without grease, for me anyway.

I guess if I just paid $50 for a filter I would say it's great too.
:bandit:



4 years of use with the same K&N filter and no dust particles or any other BS in the intake tube. I"ve rode in harsh dusty conditions to swamp like conditions. Even had the filter half way submerged in muddy water inside the airbox and still no problems.


I"m not sayin which is better but just want to clarify most K&N issues are user problems not filter problems..
:blah:

[Bean]

i have discovered running no airfilter on my 250r makes the best hp, even in dusty conditions

Originally posted by Bean
i have discovered running no airfilter on my 250r makes the best hp, even in dusty conditions :eek2: wow :eek2:

[hondarider2006]

Originally posted by Bean
i have discovered running no airfilter on my 250r makes the best hp, even in dusty conditions

lol. I remember a few years ago in dirt wheels some guy sent in an article about not running an air filter. He said that he tried it once and it added tons of power, but soon after he did it his machine blew....I wonder why:huh

[ewalker302]

Originally posted by James Parent

what ever happend to, you get what you pay for?

Exactly my point

[cals400ex]

Originally posted by Bean
i have discovered running no airfilter on my 250r makes the best hp, even in dusty conditions


nice. this is what i prefer to do also. my 400ex runs strong like this. by the way, my motor is forsale. it is in excellent condition. i guess the fresh air and dust help atomize the fuel. topend and bottom end is in like new condition. :rolleyes: anyone want to buy it. lol

[BigBadJ-400ex]

I run a K&N, clean and oil it regularly...I've never had a problem..

[BIGRED400]

Here's the info I have on air filter performance. Tests were done using
SAE J726C Test Method 5-best --> 1-worst

Oiled foam Paper Oil Bath Oiled Gauze
(AMSOIL, UNI) (K&N)

Large particle efficiency 5 5 5 4
Small particle efficiency 5 4 1 2
Airflow capacity 5 2 3 5
Dust holding capacity 4 2 5 2
Load up characteristic 4 1 5 1
Backfire characteristic 3 2 5 3
Cleanability 4 1 4 3

As you can see, K&Ns are great for airflow, which is what they were
designed for. Their original application was on racing engines, where
airflow is important and ultimate engine life was of little consern. They
are not as good at filtering as paper or oiled foam types

[Juggalo]

Originally posted by James Parent
sigh ^
hater

what ever happend to, you get what you pay for?

when it comes to quads this doesn't apply. take for instance roll design. they are the most expensive parts on the market with their 400% markup. now its easy to find parts that are just as good and in a lot of caseys better for a whole lot less than roll. so k&n flows more..you won't notice the difference. the tiny bit extra it flows will never be enough to noitce a gain in power. so why not save some money and protect your quad more and just get a uni?