Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Jay w]

http://www.knfilters.com/news/news.aspx?ID=422

makes for interesting reading

[Marks DTM Calib]

http://www.knfilters.com/news/news.aspx?ID=422

makes for interesting reading

Yes but, they also say that thier filters give more bhp.....

[Kevin Wood]

http://www.knfilters.com/news/news.aspx?ID=422

makes for interesting reading

Yes but, they also say that thier filters give more bhp.....

 

[The Elite]

K&N are liars! That is the biggest load of rubbish, so are they saying the cars diagnosis system lies? Or maybe garages have a vendetta against K&N. Not only do we know that oil contamination kills the MAF it does you lambda probes no favours either. I also know for fact that with Audi's K&N filters reduce performance. This is drivel of the highest order.

[TheBoy]

Sounds like a load of tosh to me, in same way Ford/Firestone said it wasn't their fault that blowouts were killing people.....

[theolodian]

K&N are liars! That is the biggest load of rubbish, so are they saying the cars diagnosis system lies? Or maybe garages have a vendetta against K&N. Not only do we know that oil contamination kills the MAF it does you lambda probes no favours either. I also know for fact that with Audi's K&N filters reduce performance. This is drivel of the highest order.

I ran a K&N panel filter on an Audi 1.8T for 90K miles.  Doubt that it helped the performance, but the MAF was still fine.  Did it b/c it was so hard to change out.  Cleaned/oiled once in that time.  

Usually people put too much oil on so it coats the MAF.  If you catch it early enough denatured alcohol or special cleansers will take care of it.

[TheBoy]

K&N are liars! That is the biggest load of rubbish, so are they saying the cars diagnosis system lies? Or maybe garages have a vendetta against K&N. Not only do we know that oil contamination kills the MAF it does you lambda probes no favours either. I also know for fact that with Audi's K&N filters reduce performance. This is drivel of the highest order.

I ran a K&N panel filter on an Audi 1.8T for 90K miles.  Doubt that it helped the performance, but the MAF was still fine.  Did it b/c it was so hard to change out.  Cleaned/oiled once in that time.  

Usually people put too much oil on so it coats the MAF.  If you catch it early enough denatured alcohol or special cleansers will take care of it.

Over oiling doesn't matter, K&N say that oil won't destroy MAF. Unless it comes from another source of course, then it will.

[Martin_1962]

Ran a K&N for 4 years on the 2.0 and 2 years on the 2.6 - no problems at all

[Kevin Wood]

In fairness there is a tendency for garages to blame MAF sensors unnecessarily, and maybe this has given K&N some ammunition here.

However, the fact remains that an oiled filter is not ideal if you've got a MAF sensor and won't give you a performance increase.

K&N should stick to filters for specialist and motorsport applications, where they are very good, but that's not where the mass (gullible) market is.

Kevin

[cem_devecioglu]

from an expert on the net..

"...but if it's contaminated by "silicone" then it's resistant to this burn cycle. Or in other words, it's not usable until it's replaced.

It can also become silicone contaminated via the silicone that's used on the circuitry in these sensors because it migrates and then sticks to wire surface.

It can also become contaminated by use of sprays that contain silicone! If you look at MENU#22, you'll see that the 'tire-shine' contains silicone and,

most likely is the cause of my contaminated MAF. As you see from the pictures, the silicone was applied to most 'everything' including the air breather tubes and the air box itself. A very short path from there to the MAF!  The other 'co-contaminate is the filter oil used in the K&N filters.

The MAF sensor can also be contaminated from a variety of other sources such as: dirt, oil for vapor, spider webs, potting compound from the sensor  itself and the filter oil used in reusable air filters. When a MAF sensor is contaminated, it skews the transfer function such that the sensor overestimates  air flow at idle and that causes the fuel system to go rich and it underestimates air flow at high air flows and that causes fuel system to go lean."

and another source

http://www.louv.tv/cars/m5/MAF/

[keith2.2]

slightly unrelated to K&N but VAG TDi's are known for having dead MAF's. I've had one TDi passat on 190k that never had an issue, and my current one on 136k trips out at 3k rpm under load.

a removal followed by a few squirts of carb cleaner and all is well again. cheaper than a £75 replacement sensor on a car I'm selling!

[JamesV6CDX]

Sounds like a load of tosh to me, in same way Ford/Firestone said it wasn't their fault that blowouts were killing people.....