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View Poll Results: The best airfilters around..
K&N Air Filters 140 58.58%
Pipercross Air Filters 22 9.21%
Greencotton Air Filters 57 23.85%
Othes 20 8.37%
Voters: 239. You may not vote on this poll

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Old 23rd February 2009, 19:20   #76
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Quote:
Originally Posted by R2D2 View Post
Ok chaps. Here's something I thought of and would like to share with you. Probably setting a cat among the pigeons.

What option makes more sense?
Cheers!
Well you have one taker for your thinking. Actually what you say does make lotta sense for everyday driving.
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Old 23rd February 2009, 21:09   #77
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The average air intake upgrade is just more for bling than performance. Many like K&N are living off brand loyalty and name-brand premiums.

If you have an engine that has a need for a higher volume of air, it makes sense to upgrade the air filter as a part of that upgrade. Otherwise - simply replacing the air filter will deliver a marginal 1% increase at best in a real world scenario.

Some performance cars have well tuned air intake runners and "performance" aftermarket intakes can actually lower the amount of power produced by introducing turbulence into the airstream.
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Old 24th February 2009, 12:36   #78
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Originally Posted by R2D2 View Post
My thoughts - I can replace my car's filter every 10k kms, way before it's replacement is due and do that 10 times over, in the process clocking up 100,000 kms for the price of 1 K&N.

What option makes more sense?
Stock without a doubt! As I posted earlier, the only reason I got the K&N is for the awesome sound. Anyone who thinks there is a performance benefit - atleast noticeable - is just kidding himself.
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Old 24th February 2009, 20:40   #79
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Originally Posted by GTO View Post
Stock without a doubt! As I posted earlier, the only reason I got the K&N is for the awesome sound. Anyone who thinks there is a performance benefit - atleast noticeable - is just kidding himself.
I think you got the sound by using the conical filter with an intake pipe ( correct ? )

so the stock replacement filter does not achieve even that !!

Quote:
Originally Posted by R2D2 View Post
Ok chaps. Here's something I thought of and would like to share with you. Probably setting a cat among the pigeons.

My car's original stock filter (paper) = ~Rs 550
Mfrs recommended change interval = 40,000 km standard, 20K in very dusty conditions

K&N filter stock replacement for my car = Rs 5600 (!!)

My thoughts - I can replace my car's filter every 10k kms, way before it's replacement is due and do that 10 times over, in the process clocking up 100,000 kms for the price of 1 K&N. What do I get? Here's what:

a) Retain my warranty
b) A paper filter, when new, is always more efficient than cotton gauze soaked in filter oil.
c) Zero risk with oil fouling the MAF sensor in the intake manifold. Some owners claim that has happened to their cars.
d) Peace of mind that my baby breathes as freely as the mfrs intended her to.

What I do not get:
a) A supposedly more responsive free revving engine and questionable claims of more 'power'.

What option makes more sense?

Cheers!
absolutely right and add to those calculations the typical cost of Rs100-250 for just cleaning and re-oiling the K&N atleast once in 10k kms ( Indian conditions ) all though they claim some crazy figures between as intervals between cleaning
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Old 25th February 2009, 11:36   #80
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absolutely right and add to those calculations the typical cost of Rs100-250 for just cleaning and re-oiling the K&N atleast once in 10k kms ( Indian conditions ) all though they claim some crazy figures between as intervals between cleaning
Not to mention, the labour & time spent in cleaning a K&N. It is far simpler to replace a stock airfilter, that is cheap to start with anyways.
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Old 9th March 2009, 19:38   #81
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I researched a lot about this on the net, and this is what I've come up collectively - I'll go about it on a step-by-step basis:

First we'll put K&N vs Green since that's our primary problem.

K&N claims this construction(cotton gauze) allows more air to flow while dirt and particles stick to the oil, and asserts this configuration is more efficient than paper filters, resulting in more oxygen getting into the engine, allowing vaporized fuel to burn more efficiently, thus increasing horsepower and fuel economy. However, independent tests call the veracity of these claims(underlined) into question.
Green Filters on the other hand uses woven cotton in it's manufacturing process,slightly altering things .

The benefits of woven cotton are: it's thinner, holds oil better and is stronger. Green Filter's cross-weaving one fine and one medium layer of cotton produces a fabric that is thinner and stronger than K&N's headier gauze but still has the ability to trap dirt particles of as little as .5 microns in size. Remember that it the material that is thinner not the filter as we see it.
Think of the Green material as a more uniformly formed K&N material.
This means the K&N material is prone to irregularities in formation due to it's gauze architecture. This results in certain area of the filtering material letting more than the usual .5microns of dust. Moreover, at high suction velocity (such as at high rpms) this might lead to turbulence.

Thus a Green may flow more good air than a K&N. Woven cotton is stronger than gauze. Unlike gauze, you can't wear a hole in woven cotton by rubbing it. Moreover, there is no way small bits of cotton can rip off since the woven cotton threads are interlocked with each other. (somewhat like the difference between regular and re-in forced concrete)

K&N uses a simple, pressure-molded, injection process to bond the perimeter rubber to the filter's interior components. That method saves manufacturing time, but in the process, rubber can seep onto the filtering surface. When the filter rubber bleeds onto the filter media, not only does it have the look of shoddy construction, it can restrict airflow with increase in turbulence. Green on the other hand uses a more time-consuming and expensive, four-step manufacturing process which virtually eliminates seepage and insures maximum airflow through the filter. Green chose that method because it produces a higher-quality and better-performing product - they chose the hard way to get a customer base(long term corporate goals?).

Another test which put the likes of K&N against other filters showed that K&Ns are high on air flow, but low on filtering. That coupled with K&Ns great promotion campaigns pulled it into everyone's hearts - K&N being the cheapest and most performance enhancing filter there is. I consider K&N like drugs, they give you short term horse-power but kill you on the long run.

A test had been run by AnthonyS, forumboard member of bobistheoilguy.com.

The pressure drop tests showed, as said earlier, that the K&N series have the best air-flow (what do you expect with no filtration). But on filtering tests it was second last in a set of 6 (Green was absent).


The pic above shows a second filter that was inserted after the first to show that amount of dirt that got though the actual filter. K&N has a lot passing through it. And the K&N oil is of little use, testing was done with the different on a generic filter and there was minor differences. When the pic was forwarded to K&N, they responded as is said by Anthony:

Quote:
Paper filters have no oil on them, so the oil hypothesis is a dead issue. In the e-mail I received from K&N, I actually got contradictory information on this point. They claimed that the deposit on my test filter was oil (it isn't), and then they said oil does not leave the filter and damage mass air sensors. Honestly, you can't have it both ways. Either oil leaves the filter or it doesn't. Oil will damage a mass air sensor if it gets on the sensor wiring. This is highly documented by TSBs easily available online.
Inference: Either you let in more air along with some dirt or you let in less air along with negligible dirt. You can't let in more air with no dirt. It's commonsense actually. You just gotta find the right mix.
About K&N, I think they are in the air filter industry, what Pedigree is in the dog foods industry - a lot of spectacular marketing, and a little of timing in an emerging market can go a long way to tricking the aam aadmi in us.

I, on the other hand, have shortlisted Green as my Official airfilter !
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Old 21st May 2009, 16:19   #82
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Nice effort Di1in.
Any comparison between piper cross & Green cotton.
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Old 21st May 2009, 16:46   #83
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I was considering a K&N or Green filter for my Siena. I think I'll go with Green. What will be better, the stock replacement or the conical? My filter box is damaged and I'll have to replace to use a stock replacement.
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Old 3rd July 2009, 21:33   #84
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Originally Posted by Ramsagar View Post
Nice effort Di1in.
Any comparison between piper cross & Green cotton.
No idea buddy, but I've heard Colin Mcrae (the really dude) used pipercross with ford rides.. so it has got to be good.
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Old 3rd July 2009, 21:42   #85
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Quote:
Originally Posted by pedrolourenco View Post
What will be better, the stock replacement or the conical? My filter box is damaged and I'll have to replace to use a stock replacement.


I just saw this:

What a ZS Mess from chatbear.com says:

Quote:
I tried a K&N and PiperX on my last fiesta, results were

K&N - lost lots of power+torque the engine was flat an nasty under 3k rpm and around town was really bad to drive, but once over 50mph the car did fly same as standard filter, all in all lost a bit of power but the engine sounded nice -

PiperX - this had a bit more of a smoother, round town wasnt too bad but again over 3k rpm the car was slightly faster than K&N but sounded 3times better!

and from what i have been told by VAD when i had the turbo conversion is that the standard air box is optimal, an these cone filters just suck in more hot air and sound nice, perfromance wise doesnt do very much.
Personally, i would have asked you to go for the conical since most of us here swear on them.. but this guy seems to swear differently...

My say: If you want the roar, go get a conical.

@Ramsagar: Here's the comparison you asked for. What do you make of this new mess ?
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Old 8th July 2009, 03:12   #86
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@ GTO and Di1in -

Need your advice

I have a Swifdt VDI and I am looking to get rid of the characteristic 'Krr' sound when I revv. Which filter will give me a nice sound? Cost? Best place in Bangalore?

Pls suggest.

Thanks in Advance!
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Old 8th July 2009, 09:08   #87
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di1in/others where can i get the green or K&N filters in Bangalore. Any shop/contact numbers. K&N site says Trident hyundai but they donlt deal with it when I asked them

I am looking to replace it for Getz petrol. Not going for conical but with the stock size.

Last edited by aka_iitd : 8th July 2009 at 09:10.
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Old 8th July 2009, 10:57   #88
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Quote:
Originally Posted by aka_iitd View Post
di1in/others where can i get the green or K&N filters in Bangalore. Any shop/contact numbers. K&N site says Trident hyundai but they donlt deal with it when I asked them

I am looking to replace it for Getz petrol. Not going for conical but with the stock size.
If you live somewhere near hebbal you can go to Autogrid near CBI road. If you are somewhere near residency or queens you can go to Hot Tracks.

Cheers/Shyam
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Old 8th July 2009, 11:03   #89
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Quote:
Originally Posted by aka_iitd View Post
di1in/others where can i get the green or K&N filters in Bangalore. Any shop/contact numbers. K&N site says Trident hyundai but they donlt deal with it when I asked them

I am looking to replace it for Getz petrol. Not going for conical but with the stock size.
I got K&N stock filter for my getz from Trident Hyundai, Domlur, one and a half years back.

Stock filter is available in most accessory shops. Installation is very easy as the filter just needs to be replaced.
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Old 8th July 2009, 11:10   #90
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If you can find the Spicer report (it is still there in some obscure sites) then take a look. K&N ar very poor in their filtration.
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