K&N Cone Air Filter.

[scrounger]

Hi Ror,
It is dusty here too. Have about 5-6 miles of gravel roads from house to highway.
Every K&N that I have looked through has places that you can  see right through it.  My car has over 250,000 miles on it I wouldn't be happy to have it last another 10,000.  Would be happier with another 100,000.

As far as tuning, I would agree that that less filter adds performance but it less filter can decrease longevity.

Taking the filter as a power waster perhaps you would want to run an oil filter bipass or one with just broad screen instead of a paper or cloth filter. Squeezing oil through a  filter media takes some power.

Point is that if you want more power you will have to sacrifice something.

As far as diesel tuning. Once you get beyond the internal engine and fi timing, turbo and such, the only thing that controls fuel flow is the rpm and the pedal position. Want to use less gas (aka, be more efficient) you have to drive more efficiently.  

This kind of discussion is like talking about religion, or politics. We all know what we want to know.

[tyb525]

You can see light through a paper filter too, just sayin...

[scrounger]

The K&N company always used to advertise that their filters filtered better as they became dirty. In effect they were a filter made of dirt. The dust particles were supposed to cling to the filter element creating more bulk in the filter.

Probably the same argument could be said of both open cell foam and paper elements. The dirtier they get the narrower the channels and the more dirt they will collect.

Hi Ty:
The K&N has holes that you can actually see through. I have never had a paper filter that I could perceive more than just light or dark through.

Practically all my off road machines have come factory with foam filters. Every half a millimeter, the air takes a sharp turn letting the dirt just pile up in the filter at every open bubble. I wouldn't mind putting one of those in my vw if I could get one cheap enough.

[tyb525]

I wasn't aware you could actually see through them in that way.

I have had several dirtbikes with foam filters you could wash and re-use. I wouldn't mind having one of those for the VW, I think oiled foam filters are better at filtering than paper or K&N style.

[8v-of-fury]

If the filters were completely opaque, then air would not flow. I too can see describable shapes and features through my K&N.. I can only see that there is a BRIGHT light source behind my paper filter.

I agree, except this is worse than religion. None of us (that I know of) have a flow bench to actually test anything anyone has said.. So its all just opinion thus far. Why there is such a hard-on for less filtering abilities.. I cannot fathom.

[745 turbogreasel]

My airbox lid after 50K miles of K&N horror.
The radial marks are from the molding process.
EGR and PCV  are probably both much greater particulate sources.

[R.O.R-2.0]

My airbox lid after 50K miles of K&N horror.
The radial marks are from the molding process.
EGR and PCV  are probably both much greater particulate sources.

50k miles, and its still clean...

K&N filters are just fine.

EGR & PCV definitely clog your intake more than a K&N.

[homerj1]

After starting this thread, I feel a bit guilty - as I`m not using one.    

This will be the air filter I`m using http://fmsfilters.com/products/air-filters/46277

Will be making an box to house it  ( in my  Mk1 Jetta 1.6td) - am thinking 8 inch Plastic pipe, or roll some stainless or maybe galvanized sheet metal.

They are about $12 per.

[ORCoaster]

Information shared just the same.  I think WIX does a good job with their oil filters.  If you see them cut apart along with others they have some of the nicer features. 

Going to sponge wrap the filter and oil it?  Just so you have the chance to do that as you now won't be putting on a K&N.  LOL..

[R.O.R-2.0]

Information shared just the same.  I think WIX does a good job with their oil filters.  If you see them cut apart along with others they have some of the nicer features. 

Going to sponge wrap the filter and oil it?  Just so you have the chance to do that as you now won't be putting on a K&N.  LOL..

except for the fact the case isnt very thick or tough like a mann or K&N

my diesel makes the bottom of wix filters rounded, and bulge a bit..

[homerj1]

Information shared just the same.  I think WIX does a good job with their oil filters.  If you see them cut apart along with others they have some of the nicer features. 

Going to sponge wrap the filter and oil it?  Just so you have the chance to do that as you now won't be putting on a K&N.  LOL..

  Nope just gonna put a K&N Sticker on my window and i won't even get my hands oily - 

[JamesT]

After starting this thread, I feel a bit guilty - as I`m not using one.    

This will be the air filter I`m using http://fmsfilters.com/products/air-filters/46277

Will be making an box to house it  ( in my  Mk1 Jetta 1.6td) - am thinking 8 inch Plastic pipe, or roll some stainless or maybe galvanized sheet metal.

They are about $12 per.

I've been running a prelude filter, and I would not recommend it. The filtering area is smaller than a stock TD filter.
I just ran the numbers on your link. It would be fine to run a 1.9n/a, but a TD requires significantly more air.

[homerj1]

You're right - ***!

The prelude filter runs 135 cm, While the 1.6td is 215(ish) cfm.

Damn you INternets.... 

[R.O.R-2.0]

You're right - ***!

The prelude filter runs 135 cm, While the 1.6td is 215(ish) cfm.

Damn you INternets.... 

you want to run as BIG OF FILTER AS POSSIBLE!!

there is no such thing as too big of a filter..

Digifant and TDs used a substantially bigger filter than the CIS cars and n/a diesels..