E90Post
 


ECS BMW
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > After reading 26 pages what's the conclusion on the exhaust sound mod



Reply
 
Thread Tools Search this Thread
      10-10-2012, 11:08 PM   #1
Rons335i
Private
 
Drives: 335i
Join Date: Aug 2012
Location: Anaheim

Posts: 70
iTrader: (0)

After reading 26 pages what's the conclusion on the exhaust sound mod

Here's the link

http://www.e90post.com/forums/showthread.php?t=80661

1.) does it affect top end speed
2.) is it harmful in the long term or at all?
3.) does it void any type of warranty.
4.) Worth keeping mod on.

Thanks, it wasn't clear after 26 pages.
Rons335i is offline  
0
Reply With Quote
      10-10-2012, 11:14 PM   #2
notan///m
Colonel
 
notan///m's Avatar
 
Drives: AY F80 (out of the oven)
Join Date: Feb 2012
Location: USA

Posts: 2,021
iTrader: (4)

Garage List
bottom line - if you don't have $$$ to spend on an exhaust, go for it. It does throw a hidden code, but not a warning code. It doesn't create/lose any noticeable performance. I upgraded to the PE and haven't really felt the 5hp gains that it claims to add. Top speed... no. Who drives at 155mph anyway? If you do, you should be driving on the track... or the autobahn. The harmful part is still unclear. Not sure if the vacuum is there solely as a sound damping device or for something else.
__________________


CCA Member

notan///m is offline  
0
Reply With Quote
      10-11-2012, 09:27 AM   #3
roundel335
Brigadier General
 
roundel335's Avatar
 
Drives: 13 335i Sedan, 11 128i Cabrio
Join Date: Apr 2010
Location: Leland, NC

Posts: 3,533
iTrader: (2)

Garage List
The vacuum is there to operate the flap on the muffler to divert all exhaust to the passenger side muffler during warmup, primarily to reduce the sound. It also functions when cruising - step on the gas, the vacuum decreases and opens the flap. It won't hurt anything. Rather than unplugging the connector, get yourself a golf tee and plug the vacuum hose. This has been covered in other posts hundreds of times!
__________________

2013 F30 335i M-Sport 8AT/MPE/MPPK, 2011 128i M-sport Cabrio 6MT/PE
roundel335 is offline   United_States
0
Reply With Quote
      10-11-2012, 10:02 AM   #4
CombatNinja
Banned
 
CombatNinja's Avatar
 
Drives: e91 328i, e90 328i, e90 335i
Join Date: Feb 2011
Location: United States

Posts: 1,587
iTrader: (0)

Let's look at this logically: if this caused some sort of damage to the engine, how do you explain thousands of N54/55 cars with aftermarket exhausts running for years without issue? Or better yet, explain the factory approved Performance Exhaust that has no flapper valve.
CombatNinja is offline  
0
Reply With Quote
      10-11-2012, 10:04 AM   #5
smallseafishie
Lieutenant Colonel
 
Drives: AW 07 e92 335i + AW 11 X5 35d
Join Date: Jun 2007
Location: Atlanta GA

Posts: 1,725
iTrader: (12)

Garage List
2007 E92 335i  [0.00]
Or get a JB4 and have it canbus controlled.
smallseafishie is offline  
0
Reply With Quote
      10-11-2012, 10:07 AM   #6
Slow_335i
Daily Driven!
 
Slow_335i's Avatar
 
Drives: BMW 335i
Join Date: Jun 2011
Location: Peoria IL

Posts: 2,490
iTrader: (11)

Garage List
2008 BMW 335I  [3.32]
OP you're really over thinking a basic mod.
__________________
Slow_335i is offline   United_States
0
Reply With Quote
      10-11-2012, 10:19 AM   #7
e92oholic
Banned
 
Drives: 2013 MINI JCW GP
Join Date: Feb 2012
Location: Buffalo NY

Posts: 854
iTrader: (6)

omg 2 post in one day about this.. conclusion dont do it your car will blow up
e92oholic is offline   United_States
0
Reply With Quote
      10-11-2012, 12:19 PM   #8
kkakonn
Second Lieutenant
 
kkakonn's Avatar
 
Drives: white bmw
Join Date: Jul 2012
Location: oc

Posts: 279
iTrader: (0)

Quote:
Originally Posted by Rons335i View Post
Here's the link

http://www.e90post.com/forums/showthread.php?t=80661

1.) does it affect top end speed
2.) is it harmful in the long term or at all?
3.) does it void any type of warranty.
4.) Worth keeping mod on.

Thanks, it wasn't clear after 26 pages.
1). Nah
2). Nah
3). It shouldn't. I didn't even unplug anything, all I did was pinch the vacuum line together and zip tie it. Works pretty much the same.
4). I kept it on the day I bought my car to the day I upgraded my exhaust.

Just do it and you'll be happy you did
__________________
kkakonn is offline  
0
Reply With Quote
      10-11-2012, 04:01 PM   #9
Eric335
Colonel
 
Eric335's Avatar
 
Drives: 2007 E92 SG 335i 6MT
Join Date: Apr 2011
Location: SW Florida

Posts: 2,492
iTrader: (0)

Garage List
2007 BMW 335i  [3.83]
Ive been running with the un-plug method for nearly 6 months. No problems so far and no hassles from the dealership either.
__________________
Eric335 is offline   United_States
0
Reply With Quote
      10-12-2012, 12:32 AM   #10
jetblackcoupe
Captain
 
jetblackcoupe's Avatar
 
Drives: 2008 e92 335i 6MT
Join Date: Apr 2011
Location: NJ

Posts: 710
iTrader: (2)

mine has been unplugged for over a year. been to the dealer countless times. no problems. nothing exploded and the car didn't get slower
jetblackcoupe is offline  
0
Reply With Quote
      10-12-2012, 06:19 AM   #11
spool twice
Rainbow Racer
 
spool twice's Avatar
 
Drives: S65B40
Join Date: Sep 2010
Location: Sarasota, FL

Posts: 1,277
iTrader: (7)

unplugging it via the connector or the vacuum line rids the car of another source of rattling; the one from the flapper, another benefit.
__________________
'15 IS350 F-sport Ultra White/Rioja Red
'09 E90 M3 7-DCT Interlagos Blue/Novillo Silver
[MS Pullies|K&N drop-in|Test Pipes |Evolve Stage II tune|Evolve Servotronic Map|Evolve M3 GTS-DCT file]
Now gone
spool twice is offline   United_States
0
Reply With Quote
      10-12-2012, 11:46 AM   #12
Eleventeen
Second Lieutenant
 
Drives: 2007 335i
Join Date: May 2009
Location: South Jersey

Posts: 227
iTrader: (1)

The flap is fully open once the car warms up (after about a minute), so defeating it essentially does nothing. Take a flashlight outside and watch it open for yourself. You can see it in the left tailpipe.
__________________
[insert list of gas guzzling, warranty voiding, environment destroying, pocket emptying mods that still make you smile, here]
Eleventeen is offline   United_States
0
Reply With Quote
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 02:57 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