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 > Anyone wondering what inside a stock muffler looks like? (pics inside)



Reply
 
Thread Tools Search this Thread
      01-06-2013, 11:56 PM   #1
sammy_0559
Lieutenant Colonel
United_States
104

 
sammy_0559's Avatar
 
Drives: e93 2008 Montego Metallic 335i
Join Date: Apr 2011
Location: FortWorth, Texas


Posts: 1,946
iTrader: (0)

Garage List
2008 E93 335i  [1.83]
Anyone wondering what inside a stock muffler looks like? (pics inside)

So after this backfiring happened i noticed weird stuff coming out my exhaust.
thread to backfiring.
http://www.e90post.com/forums/showthread.php?t=788425

anyways i dropped the exhaust yesterday and took it to my buddies house where we wanted cut the cats open and check on the or remove them because they sounded like they were screwed.
long story short we cut the secondaries open and there was nothing in there!! lol

so we thought it might be piled up in the muffler so we cut the muffler open and i guess we cut too short. but on the uncut side i think contains padding and straight pipe with holes in it, but the cats probably passed right through it. so I'm going to weld it up tomorrow morning and re install it on the car
in the mean time here is a pic of the the progress
enjoy.

Name:  IMG_3047.jpg
Views: 1238
Size:  195.6 KB


Name:  IMG_3050.jpg
Views: 1212
Size:  319.5 KB

Name:  IMG_3053.jpg
Views: 1197
Size:  342.3 KB

Name:  IMG_3057.jpg
Views: 1210
Size:  277.1 KB

Name:  IMG_3056.jpg
Views: 1221
Size:  212.8 KB

Name:  IMG_3052.jpg
Views: 1181
Size:  281.4 KB

Name:  IMG_3054.jpg
Views: 1184
Size:  305.6 KB
Appreciate 0
      01-07-2013, 12:08 AM   #2
Doc K
Fleet Admiral ★★★★★
United_States
20

 
Doc K's Avatar
 
Drives: E90 325i SG
Join Date: Feb 2011
Location: Woodinville


Posts: 498
iTrader: (2)

Send a message via Skype™ to Doc K
Looks like a bunch of dead, burned up pidgeons, lol.
Appreciate 0
      01-07-2013, 12:49 AM   #3
idrift4wd
Brigadier General
65

 
Drives: Three Hundred and Thirty Five
Join Date: Jul 2010
Location: Yonkers NY


Posts: 3,372
iTrader: (0)

Garage List
2007 BMW  [3.50]
holy shit i thought there was a dead cat in there.
Appreciate 0
      01-07-2013, 03:18 AM   #4
Sick335
Major
United_States
41

 
Drives: 335i
Join Date: Oct 2011
Location: Tarzana, CA


Posts: 1,022
iTrader: (1)

Haha nice... should have done this with the exhaust sitting in my garage years ago...

Cool post!
__________________

JB4 G5 ISO+BMS Flash+RB Turbos+Meth=
Appreciate 0
      01-07-2013, 07:55 AM   #5
demontwinz
Lieutenant
11

 
Drives: 335i e92
Join Date: Sep 2012
Location: Toronto


Posts: 455
iTrader: (0)

i think a raccoon got inside your muffler
__________________
Appreciate 0
      01-07-2013, 08:49 AM   #6
subbie79
Banned
1

 
Drives: 2007 335i Sedan
Join Date: May 2012
Location: Bellevue WA


Posts: 25
iTrader: (0)

I wonder if that secondary car converter is really a cat converter. Just by looking at the picture it looks more like a resonator.
Appreciate 0
      01-07-2013, 08:54 AM   #7
SfValley335i
Colonel
Afghanistan
94

 
Drives: Current:135i Sold:335i sedan
Join Date: Mar 2007
Location: City of Angels


Posts: 2,396
iTrader: (8)

Send a message via AIM to SfValley335i
Quote:
Originally Posted by subbie79 View Post
I wonder if that secondary car converter is really a cat converter. Just by looking at the picture it looks more like a resonator.
It really is a cat, OP might have shot his out if he has 2step or something...
Appreciate 0
      01-07-2013, 09:15 AM   #8
sammy_0559
Lieutenant Colonel
United_States
104

 
sammy_0559's Avatar
 
Drives: e93 2008 Montego Metallic 335i
Join Date: Apr 2011
Location: FortWorth, Texas


Posts: 1,946
iTrader: (0)

Garage List
2008 E93 335i  [1.83]
Quote:
Originally Posted by SfValley335i View Post
It really is a cat, OP might have shot his out if he has 2step or something...
I'm AT, i shot it out with the issues I'm having lol i might have abused the issues a bit
Appreciate 0
      01-07-2013, 10:41 AM   #9
robc1976
DIYER
158

 
robc1976's Avatar
 
Drives: E90 335i
Join Date: Mar 2012
Location: Illinois


Posts: 4,705
iTrader: (11)

Quote:
Originally Posted by Doc K View Post
Looks like a bunch of dead, burned up pidgeons, lol.
I literally almost fell out of my seat and spit coffee all over my PC screen ROFLMAO!!!
__________________
JB4 G5, WEDGE flash, 455 LPFP, HFS-4 meth kit, BMS OCC, Motiv 750 ST, RB valve, BMS DCI, 3" AR Dps, Custom OC W/ SS lines, ER FMIC, ER CP W/HKS BOV, M3 control arms, M3 guide rods, M3 upper links, M3 front & rear sway-bars, HPA rear toe arms, Wavetrac LSD, HPF Gen 2 exhaust DEFIV kit, KW clubsport, Delrin solid subframe bushings, stoptech rotors, Rogue Tranny Mounts, 1M bumper, M3 CF hood, MORR VS8.2 rims 245/295
Appreciate 0
      01-07-2013, 12:39 PM   #10
Jeff@TopGearSolutions
BimmerPost Supporting Vendor
United_States
291


 
Jeff@TopGearSolutions's Avatar
 
Drives: C6 Z06, GSXR-750, 09 335i
Join Date: Dec 2008
Location: TopGearSolutions.com


Posts: 18,019
iTrader: (32)

Send a message via AIM to Jeff@TopGearSolutions
Looks like a perforated core and fiberglass or something. That's why most cat back's don't add too much power, it's already a pretty good exhaust from the factory.

Without that packing it might sound like a tin can though. Have you driven it?
Appreciate 0
      01-07-2013, 02:24 PM   #11
sammy_0559
Lieutenant Colonel
United_States
104

 
sammy_0559's Avatar
 
Drives: e93 2008 Montego Metallic 335i
Join Date: Apr 2011
Location: FortWorth, Texas


Posts: 1,946
iTrader: (0)

Garage List
2008 E93 335i  [1.83]
Quote:
Originally Posted by Jeff@TopGearSolutions View Post
Looks like a perforated core and fiberglass or something. That's why most cat back's don't add too much power, it's already a pretty good exhaust from the factory.

Without that packing it might sound like a tin can though. Have you driven it?
no not yet. my car is still broken but if it does sound like a tin can im gonna
Appreciate 0
      01-07-2013, 02:56 PM   #12
e92ben
Lieutenant Colonel
73

 
e92ben's Avatar
 
Drives: BMW M3
Join Date: Jul 2011
Location: Kenosha Wi


Posts: 1,974
iTrader: (4)

Quote:
Originally Posted by sammy_0559
Quote:
Originally Posted by Jeff@TopGearSolutions View Post
Looks like a perforated core and fiberglass or something. That's why most cat back's don't add too much power, it's already a pretty good exhaust from the factory.

Without that packing it might sound like a tin can though. Have you driven it?
no not yet. my car is still broken but if it does sound like a tin can im gonna
Think you'll like it without padding or minimal. The 335is muffler sounds dope and its the oem muffler without much of the padding.
__________________

e92 ///M3
Appreciate 0
      01-07-2013, 03:47 PM   #13
Jeff@TopGearSolutions
BimmerPost Supporting Vendor
United_States
291


 
Jeff@TopGearSolutions's Avatar
 
Drives: C6 Z06, GSXR-750, 09 335i
Join Date: Dec 2008
Location: TopGearSolutions.com


Posts: 18,019
iTrader: (32)

Send a message via AIM to Jeff@TopGearSolutions
Quote:
Originally Posted by sammy_0559 View Post
no not yet. my car is still broken but if it does sound like a tin can im gonna
Quote:
Originally Posted by e92ben View Post
Think you'll like it without padding or minimal. The 335is muffler sounds dope and its the oem muffler without much of the padding.
Definitely curious. It might just be the happy medium from a muffler delete as those tend to drone a lot. If anything it may be a bit raspy.
Appreciate 0
      01-07-2013, 05:23 PM   #14
e92oholic
Banned
United_States
36

 
Drives: 2013 MINI JCW GP
Join Date: Feb 2012
Location: Buffalo NY


Posts: 854
iTrader: (6)

http://www.e90post.com/forums/showthread.php?t=250659
Appreciate 0
      01-07-2013, 06:03 PM   #15
sammy_0559
Lieutenant Colonel
United_States
104

 
sammy_0559's Avatar
 
Drives: e93 2008 Montego Metallic 335i
Join Date: Apr 2011
Location: FortWorth, Texas


Posts: 1,946
iTrader: (0)

Garage List
2008 E93 335i  [1.83]
Quote:
Originally Posted by e60oholic
Cool, so this has been done before maybe if opened up the other side would've been a good idea but oh we'll padding and muffler thing is in the other part. Might sound uniqe. But we shall see
Appreciate 0
      01-08-2013, 11:14 AM   #16
Gugs
Cynical
United_States
11

 
Gugs's Avatar
 
Drives: E92 JetBlack
Join Date: Jul 2012
Location: Long island


Posts: 431
iTrader: (1)

Quote:
Originally Posted by SfValley335i
It really is a cat, OP might have shot his out if he has 2step or something...
They are resonators. There are no secondary cats as the newbs/lemmings seem to think.
Appreciate 0
      01-08-2013, 11:23 AM   #17
N111CUK
G force Junkie
United Kingdom
4

 
N111CUK's Avatar
 
Drives: 335i M Sport black edition
Join Date: Jun 2012
Location: United kingdom


Posts: 129
iTrader: (0)

Garage List
Send a message via Skype™ to N111CUK
ok I have some important info for UK owners.

I have catless DP and stock exhaust so in theory I have no cats at all.

Well I passed my MOT test with the same results as stock DP.

Anyone worried about no cats well I say go for it UK testers will pass the car in any case.

Appreciate 0
      01-08-2013, 11:48 AM   #18
ign335i
Second Lieutenant
7

 
Drives: 335i e92
Join Date: Nov 2012
Location: CA


Posts: 287
iTrader: (3)

Quote:
Originally Posted by e92ben View Post
Think you'll like it without padding or minimal. The 335is muffler sounds dope and its the oem muffler without much of the padding.
How does it sound with catless DPs though?
Appreciate 0
      01-08-2013, 01:38 PM   #19
Red_Bean_Bun
Captain
11

 
Drives: E92
Join Date: Nov 2009
Location: Wilmington, DE


Posts: 708
iTrader: (2)

It would be more interestng if there are sound clips on the catless DPs ....
Appreciate 0
      01-09-2013, 05:53 AM   #20
SuperBmw
Lieutenant
32

 
Drives: 07 E92 335i
Join Date: Dec 2010
Location: Toronto


Posts: 513
iTrader: (5)

Quote:
Originally Posted by Gugs View Post
They are resonators. There are no secondary cats as the newbs/lemmings seem to think.
You are the newb/lemming.
Those are not resonators, they are catalytic converters. Cut an intact one open and it will be BEYOND obvious that it is not a resonator and is indeed a catalytic converter

Quote:
Originally Posted by e92ben View Post
Think you'll like it without padding or minimal. The 335is muffler sounds dope and its the oem muffler without much of the padding.
It's a bit more different than that actually, that's why removing packing material doesn't achieve the same sound.
Appreciate 0
      01-09-2013, 07:13 AM   #21
ken1137
Brigadier General
United_States
64

 
ken1137's Avatar
 
Drives: a slow 2009 e90 335i
Join Date: Jun 2011
Location: Chicago


Posts: 3,698
iTrader: (7)

Garage List
2009 e90 335i  [3.20]
NASTY!
__________________

BMWCCA member
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 10:28 PM.




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