12425 - Established June, 2013 - all GRiSO, all the time...
 
HomeFAQRegisterLog in

Share | 
 

 Debunking the K&N Myth: Why OEM is Better

View previous topic View next topic Go down 
AuthorMessage
LBC Tenni
Nibbio
Nibbio


Posts : 502
Join date : 2014-06-05

PostSubject: Debunking the K&N Myth: Why OEM is Better   Mon Jul 20, 2015 12:14 pm

Here is a very enlightening read with empirical data, illustrating why oiled media air filters are a pox outside the realm of racing.

[You must be registered and logged in to see this link.]
Back to top Go down
waterbottle
GRiSO
GRiSO


Posts : 1039
Join date : 2015-02-02
Age : 55

PostSubject: Re: Debunking the K&N Myth: Why OEM is Better   Mon Jul 20, 2015 1:10 pm

Very interesting. I've never used one and always felt a bit suspect of an air filter you can see through. Shocked I've never done any racing but I can see their use there.
Back to top Go down
beetle
GRiSO
GRiSO


Posts : 3976
Join date : 2013-09-30

PostSubject: Re: Debunking the K&N Myth: Why OEM is Better   Mon Jul 20, 2015 1:44 pm

cheers

Excellent! Thanks for posting this Don. Cred for you!
Back to top Go down
Lenz9753
Tanabuso
Tanabuso


Posts : 87
Join date : 2015-06-16

PostSubject: Re: Debunking the K&N Myth: Why OEM is Better   Mon Jul 20, 2015 6:18 pm

waterbottle wrote:
Very interesting. I've never used one and always felt a bit suspect of an air filter you can see through. Shocked I've never done any racing but I can see their use there.

Yep couldn't agree more on the "see through / FAIL" test.

I've used the Australian-made UNI oiled foam air filters with a prefilter / stripper outerlayer on many of my engines. Not one of them show the slightest sign of dusting on the walls of the filtered side of the exhaust tract however a number of paper element air filters have allowed dusting to occur.
Back to top Go down
Pete Roper
GRiSO
GRiSO


Posts : 3783
Join date : 2013-05-29
Age : 59

PostSubject: Re: Debunking the K&N Myth: Why OEM is Better   Mon Jul 20, 2015 6:41 pm

Aftermarket air filters are almost universally awful. If you want to waste some money and trash your engine there are few better ways. Oh, you could add an O2 sensor fooler I suppose and one of those washable oil filters if you want to complete the full trifecta of awful! Very Happy

Pete
Back to top Go down
tocino
Nibbio
Nibbio


Posts : 556
Join date : 2014-06-21

PostSubject: Re: Debunking the K&N Myth: Why OEM is Better   Tue Jul 21, 2015 5:56 am

Don't forget stick-on vortex generators!
Back to top Go down
KevinEmpire
Tanabuso
Tanabuso


Posts : 63
Join date : 2015-07-05
Age : 25

PostSubject: Re: Debunking the K&N Myth: Why OEM is Better   Tue Jul 21, 2015 10:34 pm

False. I took a hole saw and punched through the top of my airbox lid, and the filter itself and gained 15 rwhp. The chucks of paper and plastic in the intake track are especially beneficial.

^^
highly sarcastic.

Anyway, the air filter debate reminds me a little of when my dad was teaching me how to drive a car down a drag strip, and I asked him about "power shifting" by keeping the throttle floored and jamming the next gear in as fast as possible because I'd seen it in a youtube video. He said something like "shifting like that might make you a tenth or two faster down the 1/4, but it'll probably cut the life of your transmission by 1/4 too. Is that worth it to you in a daily driven car?"

Same thing sorta applies with high flow air filters. Is 1 or 2 horsepower at the top end really worth the reduced protection for the engine?
Back to top Go down
Pete Roper
GRiSO
GRiSO


Posts : 3783
Join date : 2013-05-29
Age : 59

PostSubject: Re: Debunking the K&N Myth: Why OEM is Better   Tue Jul 21, 2015 11:27 pm

As has been pointed out repeatedly a smaller filter will quite happily flow enough air for a 140+HP Aprilia V4. There is a reason the Guzzi 8V won't produce the same sort of performance as a 1098 or whatever the designation of the current Ducati shitbox is and it ain't the air filter.

Pete
Back to top Go down
sidrat
Sfregiato
Sfregiato


Posts : 415
Join date : 2014-09-22
Age : 56

PostSubject: Re: Debunking the K&N Myth: Why OEM is Better   Wed Jul 22, 2015 12:33 am

Very interesting, many thanks
Back to top Go down
Lenz9753
Tanabuso
Tanabuso


Posts : 87
Join date : 2015-06-16

PostSubject: Re: Debunking the K&N Myth: Why OEM is Better   Thu Jul 23, 2015 3:39 am

You are all entitled to your own opinions.

I have used the Australian - made UNI, oiled urethane foam air filters (not oiled cotton gauze as per K&N) for many years in dirt bikes, four wheel drives, cars, karts and speedway bikes. All these filters were fitted as 2 stage / layer filters.

At 275,000km when my 4WD was having a head gasket refit, the cylinders were measured and found to have less than 0.001" lip wear. There has never been any discoloration of the inside filter layers nor has ANY deposits of dust been detected on the clean sides of the air boxes / inlet tract in any of my engines or engines I have maintained.

At 390,000km the 4WD engine performs as new and DOES NOT BURN OIL.

Even under extremely dusty conditions, the inner layers of the filters and the clean sides of the inlet tracts DON'T GET DUSTED.

To my horror when I was assessing the state of my recently purchased GRiSO last month, I found a light dusting on the airbox surfaces - it's running a genuine paper filter and there's no sign of spaces or gaps around the exterior mating faces. The paper filter is not heavily loaded or showing signs of deformation / failure  ?????

Oiled cotton gauze filters are stone sieves not dust filters from the results I have seen with them.
Back to top Go down
Pete Roper
GRiSO
GRiSO


Posts : 3783
Join date : 2013-05-29
Age : 59

PostSubject: Re: Debunking the K&N Myth: Why OEM is Better   Thu Jul 23, 2015 3:58 am

My friend, you are welcome to your opinion, and also we are talking chalk and cheese. A from filter will filter well, it will clog quickly. This is a different situation to a K&N type labyrinth filter.

IMHO a correctly installed and serviced paper filter will not only flow more than adequate air, (And we won't even start on the way the engine breathes.) will work much better and add much greater protection with less effort than any of the aftermarket alternatives.

You won't suddenly pull an extra 15HP out of your 8V Guzzi with a filter, even if you go bonkers on mapping. The end!

Pete
Back to top Go down
Lenz9753
Tanabuso
Tanabuso


Posts : 87
Join date : 2015-06-16

PostSubject: Re: Debunking the K&N Myth: Why OEM is Better   Thu Jul 23, 2015 4:46 am

Pete Roper wrote:
...... The end!

Pete

Agreed my friend
Back to top Go down
Pete Roper
GRiSO
GRiSO


Posts : 3783
Join date : 2013-05-29
Age : 59

PostSubject: Re: Debunking the K&N Myth: Why OEM is Better   Thu Jul 23, 2015 4:59 am

Thumbs Up
Back to top Go down
Sponsored content




PostSubject: Re: Debunking the K&N Myth: Why OEM is Better   Today at 7:56 pm

Back to top Go down
 
Debunking the K&N Myth: Why OEM is Better
View previous topic View next topic Back to top 
Page 1 of 1

Permissions in this forum:You cannot reply to topics in this forum
GRiSO ghetto :: The Ghetto :: GRiSOLOGY-
Jump to: