Cold Air intake project - Page 2 - Rennlist - Porsche Discussion Forums

Notices

Cold Air intake project

Reply

Old 01-30-2018, 12:52 PM
  #16
gpr8er
Addict
Rennlist Member
Thread Starter
 
gpr8er's Avatar
 
Join Date: Jun 2008
Location: So. Cal
Posts: 579
Default

gpr8er is offline  
Reply With Quote
Old 01-30-2018, 12:55 PM
  #17
gpr8er
Addict
Rennlist Member
Thread Starter
 
gpr8er's Avatar
 
Join Date: Jun 2008
Location: So. Cal
Posts: 579
Default


The air filter I want to use is backordered from AFE you've got to have a band saw for this kind of stuff makes it so much easier trial and error
gpr8er is offline  
Reply With Quote
Old 02-10-2018, 10:11 PM
  #18
gpr8er
Addict
Rennlist Member
Thread Starter
 
gpr8er's Avatar
 
Join Date: Jun 2008
Location: So. Cal
Posts: 579
Default

Well the filter finally made it in from a AFE took a few weeks for these guys obviously is not on the Shelf it's the exact same dimensions as the filter for the Rogue MAF
gpr8er is offline  
Reply With Quote
Old 02-10-2018, 10:14 PM
  #19
gpr8er
Addict
Rennlist Member
Thread Starter
 
gpr8er's Avatar
 
Join Date: Jun 2008
Location: So. Cal
Posts: 579
Default

I've got it all mocked up where I think it's going to work the fender liner hasn't been fitted yet

it looks like it's going to be tight but I think it will work
gpr8er is offline  
Reply With Quote
Old 02-10-2018, 10:19 PM
  #20
gpr8er
Addict
Rennlist Member
Thread Starter
 
gpr8er's Avatar
 
Join Date: Jun 2008
Location: So. Cal
Posts: 579
Default

Well was it really worth the effort IDK probably no real benefit performance wise but it was a fun project I like doing these little tweaks
gpr8er is offline  
Reply With Quote
Old 02-11-2018, 01:12 AM
  #21
rlm328
Addict
Rennlist Member
 
rlm328's Avatar
 
Join Date: Aug 2007
Location: Houston, Texas
Posts: 3,315
Default

The filter inside the wheel well like that is going to get filthy which in turn will cause flow restrictions.
rlm328 is offline  
Reply With Quote
Old 02-11-2018, 01:51 AM
  #22
gpr8er
Addict
Rennlist Member
Thread Starter
 
gpr8er's Avatar
 
Join Date: Jun 2008
Location: So. Cal
Posts: 579
Default

I will be reinstalling the fender liner, so in effect it's the same air intake point as the OE snorkel.
gpr8er is offline  
Reply With Quote
Old Yesterday, 04:54 PM
  #23
Dash01
User
 
Dash01's Avatar
 
Join Date: May 2003
Location: Anacortes, WA
Posts: 983
Default

Originally Posted by gpr8er View Post
I will be reinstalling the fender liner, so in effect it's the same air intake point as the OE snorkel.
Trouble is, the factory location for the intake snorkle is not very good: Best intake position would be at the aerodynamic stagnation point at the front of the car, basically where the license plate is. Air stacks up there, then whips up over the hood or around the fenders, accelerating and losing pressure (per Bernoulli) in the process, so by the time it gets to the wheel well, pressure has dropped. Plus lots of turbulence, although the fender liner would attenuate this problem.

Autospeed (the Australian online car fixit/mod magazine) did a study ( http://www.autospeed.com/cms/article.html?&A=113157) on this and found that properly applied ram air can slightly overcome and therefore offset the internal line drag from the plumbing, filter, etc., so it's a worthwhile effort if done correctly. OTOH, putting the intake snorkle at a low pressure point could worsen the problem by reducing ambient pressure at the point of intake.

Make a simple manometer using clear plastic tubing, and water with food coloring inside, to test ambient pressure at various points around the car, and you'd soon see the front license plate location (or just below it) is about the best. Put some gauze or a bit of sponge at the intake end of the tube to dampen pressure fluctuations, and mark the tube with a felt tip pen to note standing and moving pressure levels of the water.

Or, use scotch tape and put pits of ~3" yarn or dental floss like freckles on the face of the car, and have an assistant with a camera take pics of the nose at highway speed, to see the stagnation point.

Last edited by Dash01; Yesterday at 05:12 PM.
Dash01 is offline  
Reply With Quote
 

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Cysco
Parts Marketplace
9
02-21-2017 10:21 PM
Shine Auto Salon
Parts Marketplace
26
08-30-2016 12:17 PM
Long Islander1
997 Forum
8
07-27-2016 12:34 PM
James Chimney
924/931/944/951/968 Forum
3
06-13-2016 01:37 PM
Shine Auto Salon
East US Rennlist Region
1
06-09-2016 06:13 PM

Thread Tools
Search this Thread
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 Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -3. The time now is 10:35 PM.


Copyright ę 1998 - 2017 Rennlist.com We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: