E90Post
 


GT Haus
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Modify OEM exhaust to sound like PE exhaust



Reply
 
Thread Tools Search this Thread
      09-20-2012, 11:21 AM   #45
elim11
Captain
 
Drives: e90m3
Join Date: Apr 2008
Location: irvine/sf

Posts: 610
iTrader: (10)

Quote:
Originally Posted by x-ception View Post


here is a video of this done on a 335, ACM in NJ does this mod for $500 I believe.
It sounds less "burbly" than a PE. Might be just the video. But does sound smooth. How can we figure out what they did? maybe call them?
__________________
elim11 is offline  
0
Reply With Quote
      09-20-2012, 11:26 AM   #46
elim11
Captain
 
Drives: e90m3
Join Date: Apr 2008
Location: irvine/sf

Posts: 610
iTrader: (10)

Doing some quick research on the ACM mod, here is what they said

"The OEM cans have some funky stuff going on inside. One has a mini muffler and the other has perforated piping. We remove both and install non-perf ss piping."

http://www.e90post.com/forums/showthread.php?p=11964496

See post #1615
__________________
elim11 is offline  
0
Reply With Quote
      09-20-2012, 11:26 AM   #47
e92oholic
Captain
 
e92oholic's Avatar
 
Drives: 2013 MINI JCW GP
Join Date: Feb 2012
Location: Buffalo NY

Posts: 854
iTrader: (6)

Quote:
Originally Posted by elim11 View Post
Thanks for stepping up to the plate. Hopefully the videoprobe can be of some use!
It has already, i gave it a try in my stock mufflers and its very easy to see the holes in the pipes, making the turn to the connecting pipe is going to be tricky, if only he will let me separate them and go that way too.

Ive been thinking and what im going to do if I cant see the connecting pipe is just wrap it in sheet metal and clamp it and see what happens before i cut them out and make it permanent. Going to try different amounts off that insulation inside too. Hopefully I can clamp the top on and use some metal tape to hang them on the car and test sound.

Going to use a decibel meter and see how it gets compared to the PE.
__________________
2013 Mini Cooper S JCW GP #361 of 500 In USA
2008 e92 335i 6 speed, Intake SOLD
2005 Sea Doo RXT (stock for now....)
2004 545i 6 speed, lots of mods- SOLD
e92oholic is offline   United_States
0
Reply With Quote
      09-20-2012, 01:56 PM   #48
x-ception
Captain
 
x-ception's Avatar
 
Drives: 335xi
Join Date: Jan 2011
Location: NY/NJ

Posts: 933
iTrader: (13)

Quote:
Originally Posted by elim11 View Post
Doing some quick research on the ACM mod, here is what they said

"The OEM cans have some funky stuff going on inside. One has a mini muffler and the other has perforated piping. We remove both and install non-perf ss piping."

http://www.e90post.com/forums/showthread.php?p=11964496

See post #1615
here are some pics of what they do to m3 exhaust to get an idea

http://www.m3post.com/forums/showthread.php?t=609950
__________________
COBB |DINAN CAI|AA FMIC|VK|OSS| Arkym

COTM Pics Here
x-ception is offline  
0
Reply With Quote
      09-21-2012, 07:40 PM   #49
Zebra99
Colonel
 
Zebra99's Avatar
 
Drives: 2011 335is E93
Join Date: Aug 2011
Location: Ontario

Posts: 2,166
iTrader: (4)

Garage List
Keep this going guys....once this mystery is cracked everyone is going to be doing this.

I have a feeling from the M3 pics and just what I've seen in the stock cans that if you replace the perforated pipe with ss straight pipe and remove maybe 50% of the packing it'll be a PE. Everything else seemed to be the same.

Maybe there is a BMW engineer/employee who wants to step up to the plate and confirm the differentiating factors of stock and PE?

Keep up the great work guys!

P.S. to add volume if you're not happy with the end result just get DP's
Zebra99 is offline   Canada
0
Reply With Quote
      09-21-2012, 07:58 PM   #50
Gugs
Cynical
 
Gugs's Avatar
 
Drives: E92 JetBlack
Join Date: Jul 2012
Location: Long island

Posts: 422
iTrader: (1)

Lets be frank here-
This is a simple mod that has been done to mufflers for countless years. Even the local dump muffler shop can perform this task blindfolded.
500 seems about 350 too much.
Gugs is offline   United_States
0
Reply With Quote
      09-21-2012, 09:46 PM   #51
chrisk03
Private First Class
 
chrisk03's Avatar
 
Drives: 2011 335i M-Sport
Join Date: Dec 2011
Location: Northeast

Posts: 114
iTrader: (1)

I will cut open my BMW Performance Exhaust...


If you all come together and replace it with a new Akrapovic...
__________________
2011 335i M-Sport, BMW Performance Powerkit Version 1, BMW Performance Exhaust, 35% F1 Pinnacle Tint
chrisk03 is offline   United_States
0
Reply With Quote
      09-21-2012, 11:53 PM   #52
Tomz_M3
Lieutenant Colonel
 
Drives: 08 Jet Black E90 M3
Join Date: Jul 2010
Location: Queens, NY

Posts: 1,726
iTrader: (11)

Let's do it!
__________________
Stock....
Tomz_M3 is offline   United_States
0
Reply With Quote
      09-25-2012, 04:27 PM   #53
elim11
Captain
 
Drives: e90m3
Join Date: Apr 2008
Location: irvine/sf

Posts: 610
iTrader: (10)

Quote:
Originally Posted by e60oholic View Post
It has already, i gave it a try in my stock mufflers and its very easy to see the holes in the pipes, making the turn to the connecting pipe is going to be tricky, if only he will let me separate them and go that way too.

Ive been thinking and what im going to do if I cant see the connecting pipe is just wrap it in sheet metal and clamp it and see what happens before i cut them out and make it permanent. Going to try different amounts off that insulation inside too. Hopefully I can clamp the top on and use some metal tape to hang them on the car and test sound.

Going to use a decibel meter and see how it gets compared to the PE.
Any updates?
__________________
elim11 is offline  
0
Reply With Quote
      09-25-2012, 07:49 PM   #54
e92oholic
Captain
 
e92oholic's Avatar
 
Drives: 2013 MINI JCW GP
Join Date: Feb 2012
Location: Buffalo NY

Posts: 854
iTrader: (6)

Quote:
Originally Posted by elim11 View Post
Any updates?
Sorry ive been slacking here. I have to use my friends welder and hes been busy at work and ive been driving all over the place. Im hoping to do it next week.

But i did scope the BMW PE and it was solid pipe everywhere I could see.
__________________
2013 Mini Cooper S JCW GP #361 of 500 In USA
2008 e92 335i 6 speed, Intake SOLD
2005 Sea Doo RXT (stock for now....)
2004 545i 6 speed, lots of mods- SOLD
e92oholic is offline   United_States
0
Reply With Quote
      09-26-2012, 07:51 AM   #55
Tomz_M3
Lieutenant Colonel
 
Drives: 08 Jet Black E90 M3
Join Date: Jul 2010
Location: Queens, NY

Posts: 1,726
iTrader: (11)

Bump for updates...
__________________
Stock....
Tomz_M3 is offline   United_States
0
Reply With Quote
      09-26-2012, 11:28 PM   #56
Beemw335
Colonel
 
Drives: 335i
Join Date: Mar 2011
Location: My car is my home

Posts: 2,000
iTrader: (2)

Quote:
Originally Posted by e60oholic
Quote:
Originally Posted by elim11 View Post
Any updates?
Sorry ive been slacking here. I have to use my friends welder and hes been busy at work and ive been driving all over the place. Im hoping to do it next week.

But i did scope the BMW PE and it was solid pipe everywhere I could see.
Hmm solid pipe everywhere would basically be a muffler delete?
Anyways, in for updates!!!
Beemw335 is offline  
0
Reply With Quote
      09-26-2012, 11:46 PM   #57
e92oholic
Captain
 
e92oholic's Avatar
 
Drives: 2013 MINI JCW GP
Join Date: Feb 2012
Location: Buffalo NY

Posts: 854
iTrader: (6)

Quote:
Originally Posted by Beemw335 View Post
Hmm solid pipe everywhere would basically be a muffler delete?
Anyways, in for updates!!!
Have you heard the BMW in person? Its loud, almost like a muffler delete but a bit more refined, i think it has something to do with the cross pipe between them making a helmholtz exhaust chamber to eliminate the drone. I could be way off but i have been doing research. I just need to make it to the dealer and pick up another exhaust clamp.
__________________
2013 Mini Cooper S JCW GP #361 of 500 In USA
2008 e92 335i 6 speed, Intake SOLD
2005 Sea Doo RXT (stock for now....)
2004 545i 6 speed, lots of mods- SOLD
e92oholic is offline   United_States
0
Reply With Quote
      09-27-2012, 12:56 AM   #58
shaginwagon13
Captain
 
shaginwagon13's Avatar
 
Drives: BMW 335i Coupe
Join Date: Apr 2012
Location: Toronto

Posts: 862
iTrader: (4)

Quote:
Originally Posted by elim11 View Post


It sounds less "burbly" than a PE. Might be just the video. But does sound smooth. How can we figure out what they did? maybe call them?
+1

I got a muffler delete a couple weeks ago welded on and it sounded just like that from the outside. Inside the cabin everything rattled, and around 3500 RPM on the highway it was so ridiculously loud in the cabin it was more annoying than anything. The guys who did this mod I am willing to bet just opened the muffler up, took all the 'wool' out and welded a pipe.... essentially making it a muffler delete. Personally I didn't like the sound, I got my OEM muffler welded back on the next day.

If someone can figure out how to get the PE sound with the OEM mufflers, I am for sure doing this mod.

Not sure if this is relevant but I seem to have found design specs for the DINAN Performance exhaust for an M3..... maybe we can make something of this? The second pic is the standard M3 exhaust.




Last edited by shaginwagon13; 09-27-2012 at 01:13 AM.
shaginwagon13 is offline   Canada
0
Reply With Quote
      09-27-2012, 09:32 PM   #59
Beemw335
Colonel
 
Drives: 335i
Join Date: Mar 2011
Location: My car is my home

Posts: 2,000
iTrader: (2)

Quote:
Originally Posted by e60oholic
Quote:
Originally Posted by Beemw335 View Post
Hmm solid pipe everywhere would basically be a muffler delete?
Anyways, in for updates!!!
Have you heard the BMW in person? Its loud, almost like a muffler delete but a bit more refined, i think it has something to do with the cross pipe between them making a helmholtz exhaust chamber to eliminate the drone. I could be way off but i have been doing research. I just need to make it to the dealer and pick up another exhaust clamp.
Yes Ive heard the perf exhaust and alrhough it is loud, it doesnt drone so I doubt its fully straight pipes?
Anyways thanks for taking the time to do this, looking foward to updates!
Beemw335 is offline  
0
Reply With Quote
      09-28-2012, 01:39 PM   #60
Alexm007
Second Lieutenant
 
Alexm007's Avatar
 
Drives: 2007 335i Coupe
Join Date: Sep 2010
Location: South Carolina

Posts: 207
iTrader: (3)


I'm very interested in what you guys are working on.... Looking forward to some conclusions!!!
__________________

2007 BMW 335i Coupe - ZSP ----------An army of sheep led by a lion is better than an army of lions led by a sheep." - Alexander The Great
Alexm007 is offline   United_States
0
Reply With Quote
      09-29-2012, 07:51 PM   #61
Tomz_M3
Lieutenant Colonel
 
Drives: 08 Jet Black E90 M3
Join Date: Jul 2010
Location: Queens, NY

Posts: 1,726
iTrader: (11)

Any updates?
__________________
Stock....
Tomz_M3 is offline   United_States
0
Reply With Quote
      09-29-2012, 11:29 PM   #62
StevenY.
///M
 
StevenY.'s Avatar
 
Drives: 10' SG e92 335i
Join Date: Aug 2012
Location: NYC

Posts: 1,361
iTrader: (1)

This sounds very interesting, I hope you guys can crack it so that we can all have a PE!
__________________
10' Space Grey e92 335i
StevenY. is offline   United_States
0
Reply With Quote
      10-01-2012, 08:53 PM   #63
335xi Kevo
Lieutenant
 
335xi Kevo's Avatar
 
Drives: 2008 335xi
Join Date: Jan 2012
Location: CT

Posts: 502
iTrader: (3)

PE is so expensive for what it is, we must solve the mystery.
__________________
08' 335xi 6MT
Space Metallic Grey
Premium, Nav, Cold weather, Sport
Procede 2.5, DCI, Forge DV, PWM, Scoops, KW V1, ETS 5" FMIC, VRSF Downpipes, M3 Skirts
335xi Kevo is offline  
0
Reply With Quote
      10-01-2012, 09:14 PM   #64
e92oholic
Captain
 
e92oholic's Avatar
 
Drives: 2013 MINI JCW GP
Join Date: Feb 2012
Location: Buffalo NY

Posts: 854
iTrader: (6)

Quote:
Originally Posted by tomz_335i View Post
Any updates?
Waiting for my friend to help me, its his hell week at work so whenever he recovers were gonna pull the exhaust off and have at it
__________________
2013 Mini Cooper S JCW GP #361 of 500 In USA
2008 e92 335i 6 speed, Intake SOLD
2005 Sea Doo RXT (stock for now....)
2004 545i 6 speed, lots of mods- SOLD
e92oholic is offline   United_States
0
Reply With Quote
      10-02-2012, 07:44 AM   #65
Tomz_M3
Lieutenant Colonel
 
Drives: 08 Jet Black E90 M3
Join Date: Jul 2010
Location: Queens, NY

Posts: 1,726
iTrader: (11)

I just decided to pull mine off and replace the internal cat, h pipe and all perforated pipes with straight pipes. Will post a video once I get it back from the shop in a few days (I have straight pipes on for the time being, they are loud as hell).
__________________
Stock....
Tomz_M3 is offline   United_States
0
Reply With Quote
      10-02-2012, 08:31 AM   #66
325imax
Private First Class
 
Drives: 2006 M Sport
Join Date: Sep 2010
Location: Virginia

Posts: 149
iTrader: (0)

Its a tuning issue as well.

Simply removing the inside baffles is not going to make it sound good. Just louder. There is a tuning issue as well. MMW CS has been making clone Performance mufflers for years.
__________________
Koni Yellow's l K&N l 18s l MMW CS l Resonator Delete l 330i intake manifold l AA Tune
325imax is offline  
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 01:42 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