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| View Poll Results: The best airfilters around.. | |||
| K&N Air Filters |    | 143 | 57.89% |
| Pipercross Air Filters |    | 24 | 9.72% |
| Greencotton Air Filters |    | 58 | 23.48% |
| Othes |    | 22 | 8.91% |
| Voters: 247. You may not vote on this poll | |||
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| Search this Thread |  173,736 views |
23rd February 2009, 19:20
| #76 | |
| BHPian  Join Date: May 2007 Location: UP 16
Posts: 936
Thanked: 159 Times
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23rd February 2009, 21:09
| #77 |
| BHPian  Join Date: Jan 2009 Location: Atlanta
Posts: 164
Thanked: 25 Times
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24th February 2009, 12:36
| #78 | |
| Team-BHP Support   | Quote:
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24th February 2009, 20:40
| #79 | ||
| Senior - BHPian  | Quote:
so the stock replacement filter does not achieve even that !! Quote:
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25th February 2009, 11:36
| #80 |
| Team-BHP Support | |
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9th March 2009, 19:38
| #81 | |
| BHPian  | 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:
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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21st May 2009, 16:19
| #82 |
| Senior - BHPian | |
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21st May 2009, 16:46
| #83 |
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3rd July 2009, 21:33
| #84 | |
| BHPian | Quote:
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3rd July 2009, 21:42
| #85 | ||
| BHPian | Quote:
I just saw this: What a ZS Mess from chatbear.com says: Quote:
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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8th July 2009, 03:12
| #86 |
| BHPian  | |
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8th July 2009, 09:08
| #87 |
| BHPian Join Date: Aug 2008 Location: Bangalore
Posts: 637
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8th July 2009, 10:57
| #88 | |
| BHPian Join Date: Feb 2009 Location: Bangalore
Posts: 346
Thanked: 2 Times
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Cheers/Shyam | |
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8th July 2009, 11:03
| #89 | |
| Senior - BHPian  | Quote:
Stock filter is available in most accessory shops. Installation is very easy as the filter just needs to be replaced. | |
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8th July 2009, 11:10
| #90 |
| Senior - BHPian  Join Date: Dec 2007 Location: Gurugram
Posts: 7,971
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