E90Post
 


VIBE Motorsports
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Venturis...fix for exhaust droning



Reply
 
Thread Tools Search this Thread
      10-03-2008, 06:16 PM   #1
emjei
Captain
emjei's Avatar
United_States
22
Rep
821
Posts

 
Drives: 08 BMW M3 Coupe
Join Date: Apr 2007
Location: Puerto Rico USA

iTrader: (3)

Venturis...fix for exhaust droning

I currently own a Borla exhaust including second cat delete.

Borla is sending me for free a set of venturi that will apparently kill the drone...........any opinions ???

Any power loss ???? experiences are welcome

Last edited by emjei; 10-03-2008 at 07:11 PM.
Appreciate 0
      10-03-2008, 06:46 PM   #2
Amir87
Gruppe Titan
Amir87's Avatar
Pakistan
64
Rep
2,839
Posts

 
Drives: 08 E92 SG/Coral
Join Date: Sep 2007
Location: NC

iTrader: (37)

Garage List
2008 E92 335i  [5.00]
Can you elaborate? Is a venturis like a silencer for exhausts?
__________________
Appreciate 0
      10-03-2008, 06:53 PM   #3
emjei
Captain
emjei's Avatar
United_States
22
Rep
821
Posts

 
Drives: 08 BMW M3 Coupe
Join Date: Apr 2007
Location: Puerto Rico USA

iTrader: (3)

As stated by the Borla rep : The venturis get tack welded into place at the pipe opening to the muffler. You would take the clamps off the muffler where it connects to the mid pipe. remove it and insert the venturis into each inlet pipe. Then you would have them welded into place. Then put it back together.
Appreciate 0
      10-03-2008, 09:32 PM   #4
shane335i
Second Lieutenant
shane335i's Avatar
3
Rep
204
Posts

 
Drives: 2011 E92 M3 Alpine White
Join Date: Sep 2008
Location: Woodside, CA

iTrader: (0)

sounds interesting - I wish Magnaflow had something like that, my car drones badly and I didnt even remove the cats.
Appreciate 0
      10-03-2008, 10:46 PM   #5
Sniz
Lieutenant General
Sniz's Avatar
189
Rep
10,572
Posts

 
Drives: e92 335 - gone // e36 M3 turbo
Join Date: Mar 2007
Location: Ellicott City, MD

iTrader: (1)

make sure you take pics of them before you install.....i'm not sure what they even are?
__________________
Appreciate 0
      10-10-2008, 06:35 PM   #6
emjei
Captain
emjei's Avatar
United_States
22
Rep
821
Posts

 
Drives: 08 BMW M3 Coupe
Join Date: Apr 2007
Location: Puerto Rico USA

iTrader: (3)

I just this venturis in the mail

Just got the apparently fix for droning......seems better that actually putting cats back....

I let you guys know how it ends

As per explanation how it works...."A common complaint with free flow straight pipe exhausts is exhaust resonation noise. In fact, many people have it but don't acknowledge it because they think it's just loud and actually like it. Resonation differs from loudness because it has a certain boominess, rattling, buzzing, or hollow vibration sounds at certain RPM. There are many possible causes, but some ways to get rid of it are installing a venturi along with a resonator at strategic positions along the exhaust, controlling flutter of the exhaust by smoothing out sharp corners in the exhaust or downpipe, or slowing the exhaust velocity by restoring the catalytic converter (contrary to performance increases but it will make the car better for daily driving)."
Attached Images
 
Appreciate 0
Reply

Bookmarks

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 -5. The time now is 12:15 AM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, 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