Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X ///M Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-06-2011, 04:07 PM
Member
 
Join Date: Dec 2010
Location: USA
Posts: 33
NOVAwhiteX5M is on a distinguished road
highflow filter for x5m?

Is anyone developing or any high flow filters available for the x5m?
Reply With Quote

Sponsored Links

  #2  
Old 01-07-2011, 02:24 AM
JCL's Avatar
JCL JCL is offline
Premier Member
 
Join Date: Mar 2005
Location: Vancouver, Canada
Posts: 11,853
JCL will become famous soon enoughJCL will become famous soon enough
Is the assumption that BMW decided to specify and supply low-flow filters when they designed the vehicle?
__________________
2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver

2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
Reply With Quote
  #3  
Old 01-09-2011, 09:33 PM
Member
 
Join Date: Dec 2010
Location: USA
Posts: 33
NOVAwhiteX5M is on a distinguished road
Quote:
Originally Posted by JCL View Post
Is the assumption that BMW decided to specify and supply low-flow filters when they designed the vehicle?
yes as most oem's provide high filteration paper filters w/ low air flow
Reply With Quote
  #4  
Old 01-10-2011, 03:05 AM
JCL's Avatar
JCL JCL is offline
Premier Member
 
Join Date: Mar 2005
Location: Vancouver, Canada
Posts: 11,853
JCL will become famous soon enoughJCL will become famous soon enough
Quote:
Originally Posted by NOVAwhiteX5M View Post
yes as most oem's provide high filtration paper filters w/ low air flow
Disagree. Do you have any data, other than from companies such as K&N?

Here is an independent test, just for reference. Several factory and aftermarket filters were checked (on a Mazda at WOT) and the pressure differential between the stock and aftermarket was in the order of 0.02 psi. And to get that gain, they sacrificed filtering capability, as shown in the test results.

Air Filter Flow Testing for Napa Gold, Amsoil two stage foam, Jackson Racing foam, Baldwin, Mazda and K&N

But you are running in the order of 15 psi of boost. How much difference is 0.02 psi going to make?

Here is another test of air filter restriction, GM Duramax diesel. The difference in restriction was around 0.06 psi in this test.

ISO 5011/SAE J726 test of Duramax Air Filters - Bob Is The Oil Guy

If you want to trade off to get the most airflow with less filtration, just remove the filter. Problem solved. Not advisable, but that's your highest flow. Thing is, the air filter restriction of a functioning factory filter isn't a factor in hp.
__________________
2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver

2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
Reply With Quote
  #5  
Old 03-12-2011, 12:29 PM
Member
 
Join Date: Dec 2010
Location: USA
Posts: 33
NOVAwhiteX5M is on a distinguished road
Well kn is now making a filter and I just ordered it for mine and my buddies x5m we'll see if gas mpg improves on either cars or any difference in throttle response. Both cars have about 2000 miles purchased same day with 2 different commutes one is 60 mile why while mine is 30m of stop and go. Having had kn filters on over 6 cars over the past 15 years I'm hoping for similar mpg improvements of1-2mpg or 20-40 more miles per tank.
Reply With Quote
  #6  
Old 03-12-2011, 01:15 PM
Member
 
Join Date: Feb 2011
Location: NY
Posts: 29
GTRnX5M is on a distinguished road
Nova, it just makes your car run leaner hence the gas mileage increase. It is not a good increase in mpg.

Your just removing a small amount of restriction, less restriction = slightly more hp and a slightly (dirtier) leaner engine. It works because every new car has a safe and rich tune.
__________________
12 X5M Black(ordered)
09 GTR Gray
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 10:07 PM.
vBulletin, Copyright 2024, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.