Bimmer Retrofit
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Air Filter Dyno Testing - Round 2 - K&N vs Helene vs ITG vs BMC vs BMS vs Stock

Thread Tools Search this Thread
      07-09-2009, 12:01 AM   #67
Major General

Drives: '09 Cpe Silverstone FR 6MT
Join Date: Nov 2008
Location: Colorado

iTrader: (0)

Garage List
2009 M3  [4.00]
Originally Posted by carve View Post
Oh- well due to the charcoal filter, you may well see a noticable improvement. I'd probably go with an aftermarket paper filter with no charcoal layer instead though (e.g. NAPA gold). That engine is too damn expensive to let extra dust in for little to no gain.
Yes, the prevailing theory is that the charcoal layer is constricting a little. Your theory about paper being superior to oiled substrate is just a theory. I'm not worried about this filter damaging my expensive engine.

THE superior filter is actually made out of something called nonwoven textiles. I worked as a consultant to a company that made such filters for Toyota. NWT was used because the density of the open space can be controlled to a very tight specification. It had "good" flow characteristics and very high filtration levels.

BTW, people that compete and use oiled filter elements clean and reoil the filter regularly. Your theory that they will end up more stopped up is also just another theory. In actual fact it will depend on how often the owner cleans and oils it.

I DO agree that for the 335i and probably the 135i, there's no significant gain to be had.

Appreciate 0
      07-09-2009, 12:47 AM   #68
carve's Avatar

Drives: 335i
Join Date: Feb 2009
Location: usa

iTrader: (0)

It is a theory- one backed up by experimental data.
Appreciate 0


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 07:26 PM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST