What air filter is better,oiled gauze type or the oiled foam type?

 

My 2¢ - foam, as long as it's not over oiled.

 

You will find both schools of thought here and each is loyal. There is no right one. A good foam or paper filter will get the job you want done.

K&N seems to be the paper filter of choice and ITG for foam.

 

Except K&N doesn't make paper filters, they are oiled cotton gauze. Paper filters are disposable and what you get from Fram or Puralator, or stock.

-Keith

 

Better for what? Paper filters the best (captures the most dirt), which is why you never see oiled filters in a HEPA vacuum cleaner or shop vac. Even "bagless" vacuums use paper filters.

 

And formula one cars use IGT Foam.

 

I was under the impression that they were paper because people would rather just replace them then clean and touch a dirty filter. For the record cigarrette filters are foam... I have no idea what that has to do with anything.

I have been told by some racing budies of mine that there is no substitute for a properly oiled foam filter. Not that it matters but I take their word for it. They also say the type of oil matters too... I have the link at home and ill post it when i get home from work.

Honestly thought... Imo there is no substitute for a properly cleaned/new filter weather it's paper or foam.

 

I'm pretty sure the lifespan of a F1 car's engine is measured in hours anyway so better performance is more important to them than better filtering. A HEPA filter must remove 99.97% of 0.3 µm particles to prevent the person vacuuming from having an acute asthma attack and also keeps dust from settling on the furniture so filtering is more important.

Hence my question of better for what?

 

http://afefilters.com/oereplacement.htm

 

There have been other threads and some pretty in depth testing done between the different filter media. According to those findings, the foam lets a little more air through (not enough to see on a dyno) than gauze, but the gauze filters filter much more dirt than foam- as mentioned above, an F1 engines life expectancy is rated in hours, so they can trade off dirt for airflow. The OEM oiled paper filter traps a whole lot of dirt, but airflow suffers. I am partial to K&N , but the aFe filters look good too.
--Dan

 

what about pipercross ?? is it good

 

8 layer gauze filters are the best compromise.
The new dry synthetic filters are very good as well.