K&N Why NOT???????

[oxman202]

Is it really as bad as people think? Does it not filter like people say? I have one, got it for 50 bucks and it seems to work. I can hear more intake and turbo noise. My mpg didn't change any for the good. Maybe because I like to give it a little more juice to hear that turbo It feels like I have a little more power in the lowend. Does anybody have any proof that it doesn't filter?

[Dave]

Take a look in bigcountrysg's gallery and you will see why a K&N drop in is not good in a turbocharged engine

Scratch that the pics not there anymore pm him and he will tell you

[sevenmalards]

If you have the K&N FIPK like I have, it's not bad, if you have the "factory replacement" drop in it's bad because it doesn't seal around the box, causing "dusting" turbo, and engine component failure.

[WILLIAM LORCH]

I have the K&N (Not factory drop in),and i have no complaints.. Been good 2 me this time... and i have a 94 PS and pull a 14K RV Bill

[oxman202]

William how long have you had yours. I have the one that comes with the intake tube and heat sheild.

[shu873]

I've got a K&N drop in (conical filter) on my wife's trailblazer because I couldn't find anyone to sell me anything different around here. It seems to filter well, no dust in the tube on inspection. I have an AFE PG7 on my truck, only about 2000 miles since I put it on, but next oil change its coming off to inspect for any dust.

[mschn99]

i wouldnt run a K&N in my lawnmower. The drop ins are TERRIBLE. The filter itself has poor filtering quality in any kit...then you add the fact that the drop ins dont seal againts the box right...and they are worse...but either way i wouldnt run ANY K&N filter in ANYTHING i own due to poor filtering quality.

You have to remember...the laws of physics make there only two ways to increase airflow over another filter.....you either have to increase surface area (they dont do that) or decrease filtration to decrease resistance of air going through....that is a TERRIBLE idea with a diesel...it will lead to sandblasted cylender walls and damaged turbo's...

[WILLIAM LORCH]

OXMAN: Just kep it clean and lite oil coat on it. ive had it for a long while now several yearsand i did lookatthe turbo noting rong there looks great... I know what im looking at iman old A&P mechanic and have worked on many turbine engines , OH if u get the flack on this about oil clinging to the wheel not to worry i have never seen one it did not (aircraft piston engines included) Its the nature of the beast... Bill

[oxman202]

Originally Posted by Marc

i wouldnt run a K&N in my lawnmower. The drop ins are TERRIBLE. The filter itself has poor filtering quality in any kit...then you add the fact that the drop ins dont seal againts the box right...and they are worse...but either way i wouldnt run ANY K&N filter in ANYTHING i own due to poor filtering quality.

You have to remember...the laws of physics make there only two ways to increase airflow over another filter.....you either have to increase surface area (they dont do that) or decrease filtration to decrease resistance of air going through....that is a TERRIBLE idea with a diesel...it will lead to sandblasted cylender walls and damaged turbo's...

I have the conical air filter Marc. It does have more surface area the the stock one, but the stock has a deeper filter. How do the AFE filters do better then a K&N when they look like they are made of the same material?

[Diesel Freak]

K & N FIPK installed here for over 10K. I have pulled the tube and inspedcted for dusting even at turbo. ALL IS WELL HERE!! I am not a fan of drop ins but do love the overall filter surface area!!