Interesting info on K&N filters

[preddy08]

I don't know about the military stuff because I have only seen the Donaldson (synthetic)filters going overseas.

This is the kit I was talking about. "Used in Operation IRAQI FREEDOM!"
http://www.puredieselpower.com/catalog/99503-73l-ford-powerstroke-severe-duty-air-intake-ais-p-75.html

[blueyamaha]

So... I run a K&N filter on my truck am I safe? I had one in my old truck one of the round ones on top of the motor for years and only cleaned it a handfull of times. You guys got me shitin my self. Cuz I got one on my new truck.

[preddy08]

So... I run a K&N filter on my truck am I safe? I had one in my old truck one of the round ones on top of the motor for years and only cleaned it a handfull of times. You guys got me shitin my self. Cuz I got one on my new truck.

Unless your truck goes where your quad goes then I would'nt worry about it. K&N's are fine for street use.

[blueyamaha]

So... I run a K&N filter on my truck am I safe? I had one in my old truck one of the round ones on top of the motor for years and only cleaned it a handfull of times. You guys got me shitin my self. Cuz I got one on my new truck.

Phew I was shitin bricks thanks man. Ha not this truck but the last truck did!

Unless your truck goes where your quad goes then I would'nt worry about it. K&N's are fine for street use.

[Colorado700R]

just did my own test with my K&N, I'm done with it 


Aaron

[preddy08]

just did my own test with my K&N, I'm done with it 


Aaron

Ill tell you that my intake tract was'nt clean after this weekends ride.

[Colorado700R]

just did my own test with my K&N, I'm done with it 


Aaron

Ill tell you that my intake tract was'nt clean after this weekends ride.

WTF good is a filter that doesn't keep out fine particles.  K&N needs a big-ass warning label that states "For low dust, or sand applications only"

[preddy08]

just did my own test with my K&N, I'm done with it 


Aaron

Ill tell you that my intake tract was'nt clean after this weekends ride.

WTF good is a filter that doesn't keep out fine particles.  K&N needs a big-ass warning label that states "For low dust, or sand applications only"

LOL, you guys will slowly learn that I'm not full of shit 100% of the time....LOL

[1FST690]

Are we suppose to assume that a pleated paper is better than a gause cotton filter, goes against everything we've been told.

Coming from the 7.3 liter diesel performance world I would 100% agree with that. They had a bad time with K&N filters "dusting" the turbos. When people started using paper filters such as what comes in the Sever Duty Filter kit that ford offers the turbos were in alot better shape. Those sever duty kits that ford offers is what the government ran in all there military vehicles in service in middle east. That right there would tell you about the filtering capibility of paper vs K&N.

I agree and disagree with the statement above:

K&N filters are horible for 2 reasons in a turbo diesel application.
  1 they are only 96% efficient to 1 micron
  2 A diesel engine of say 360 cu.in. uses approcimatly 1400 CFM of air every crank revolution

Donaldson filters, also refered as the ford severe duty filters are wonderful at trapping dirt. The are horrible at airflow. They have a triangular shaped "air passages"in them and air goes into one then has to change dirrection to go into another. This is the reason they are so effiecient at trapping dirt. It really has nothing to do with filter media. Donaldson filters are not very good on an engine either due to very high EGT's that they contribute to. You can take a bone stock truck, install a pyro and change nothing else but te airfilter to a Donaldson and see a 2-300 degree increase in EGT. This is also very hard on the turbo and pistons/rings.

Probably the best filter application that is a good comprimise for a TD app. is and AFE in the synthetic dryflow filter line. They filter just over 99% down to one micron and still have very good airflow numbers.

Airfilter technology is a comprimise between air flow and filtration. It always has been and it always will be. I do also agree that an overcleaned filter is worthless as is one that is not completely dry before re-oiling

[Kenny]

Are we suppose to assume that a pleated paper is better than a gause cotton filter, goes against everything we've been told.

Coming from the 7.3 liter diesel performance world I would 100% agree with that. They had a bad time with K&N filters "dusting" the turbos. When people started using paper filters such as what comes in the Sever Duty Filter kit that ford offers the turbos were in alot better shape. Those sever duty kits that ford offers is what the government ran in all there military vehicles in service in middle east. That right there would tell you about the filtering capibility of paper vs K&N.

I don't know about the military stuff because I have only seen the Donaldson (synthetic)filters going overseas.

This is the kit I was talking about. "Used in Operation IRAQI FREEDOM!"
http://www.puredieselpower.com/catalog/99503-73l-ford-powerstroke-severe-duty-air-intake-ais-p-75.html

I thought by your earlier post that you were saying the military filters were paper.........

[Colorado700R]

do you think the Pro-tec lid would have enough of an effect that I could still run the K&N?

[Troy]

Screw this air filter shit, I'm gonna install a 9' tall snorkel and not run a filter

[Kenny]

Are we suppose to assume that a pleated paper is better than a gause cotton filter, goes against everything we've been told.

Coming from the 7.3 liter diesel performance world I would 100% agree with that. They had a bad time with K&N filters "dusting" the turbos. When people started using paper filters such as what comes in the Sever Duty Filter kit that ford offers the turbos were in alot better shape. Those sever duty kits that ford offers is what the government ran in all there military vehicles in service in middle east. That right there would tell you about the filtering capibility of paper vs K&N.

I agree and disagree with the statement above:

K&N filters are horible for 2 reasons in a turbo diesel application.
  1 they are only 96% efficient to 1 micron
  2 A diesel engine of say 360 cu.in. uses approcimatly 1400 CFM of air every crank revolution

Donaldson filters, also refered as the ford severe duty filters are wonderful at trapping dirt. The are horrible at airflow. They have a triangular shaped "air passages"in them and air goes into one then has to change dirrection to go into another. This is the reason they are so effiecient at trapping dirt. It really has nothing to do with filter media. Donaldson filters are not very good on an engine either due to very high EGT's that they contribute to. You can take a bone stock truck, install a pyro and change nothing else but te airfilter to a Donaldson and see a 2-300 degree increase in EGT. This is also very hard on the turbo and pistons/rings.

Probably the best filter application that is a good comprimise for a TD app. is and AFE in the synthetic dryflow filter line. They filter just over 99% down to one micron and still have very good airflow numbers.

Airfilter technology is a comprimise between air flow and filtration. It always has been and it always will be. I do also agree that an overcleaned filter is worthless as is one that is not completely dry before re-oiling

That is exactly right. It is pretty well proven that a higher flowing filter passes more dirt. The problem we have with foam filters on dirt track cars is that excess crap tends to fill the pores and won't "shake off" when overloaded. I only think of the outerware as a water repellent covering. It really does nothing to stop dirt particles that can pass through the K&N. The dryflow synthetic filters out there have very thin "nano" fibers that can be woven tight enough to stop reasonable sized particles, but the fibers are so fine the filter acts like one with larger surface area. I think the AFE dryflow material and the AEM intake material are also made by Donaldson

[preddy08]

Are we suppose to assume that a pleated paper is better than a gause cotton filter, goes against everything we've been told.

Coming from the 7.3 liter diesel performance world I would 100% agree with that. They had a bad time with K&N filters "dusting" the turbos. When people started using paper filters such as what comes in the Sever Duty Filter kit that ford offers the turbos were in alot better shape. Those sever duty kits that ford offers is what the government ran in all there military vehicles in service in middle east. That right there would tell you about the filtering capibility of paper vs K&N.

I agree and disagree with the statement above:

K&N filters are horible for 2 reasons in a turbo diesel application.
  1 they are only 96% efficient to 1 micron
  2 A diesel engine of say 360 cu.in. uses approcimatly 1400 CFM of air every crank revolution

Donaldson filters, also refered as the ford severe duty filters are wonderful at trapping dirt. The are horrible at airflow. They have a triangular shaped "air passages"in them and air goes into one then has to change dirrection to go into another. This is the reason they are so effiecient at trapping dirt. It really has nothing to do with filter media. Donaldson filters are not very good on an engine either due to very high EGT's that they contribute to. You can take a bone stock truck, install a pyro and change nothing else but te airfilter to a Donaldson and see a 2-300 degree increase in EGT. This is also very hard on the turbo and pistons/rings.

Probably the best filter application that is a good comprimise for a TD app. is and AFE in the synthetic dryflow filter line. They filter just over 99% down to one micron and still have very good airflow numbers.

Airfilter technology is a comprimise between air flow and filtration. It always has been and it always will be. I do also agree that an overcleaned filter is worthless as is one that is not completely dry before re-oiling

Where did you get this information? The guys running the AIS intake on the 7.3 liter diesels saw a DROP in EGT's. The AIS intake is what the safer guys would run, that did'nt want to run a full on open intake.

Sorry Kenny, I thought that the AIS used a paper filter with a foam wrap.

[Krandall]

Screw this air filter shit, I'm gonna install a 9' tall snorkel and not run a filter

You just gotta worry about sucking in birds