BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      06-03-2008, 09:23 PM   #45
BMW Dreamer
Colonel
 
BMW Dreamer's Avatar
 
Drives: Modded 06 TL Manual
Join Date: Apr 2008
Location: Northern IL.

Posts: 2,387
iTrader: (0)

Very curious how Borla, Magna, Dyno will sound. I would think Magnaflow might be the cheapest along with Dynomax.
$1400 is quite a bit for the CP-E. I agree the Corsa sounds really good but a little ricey.

Listened to the CP-E several times, it sounds like a Ferrari. Cool.
The Corsa has a low rumble at idle pulling out of the garage thats really cool.
Need to get some numbers on all the diff exhausts. Can't wait to hear Borla.
BMW Dreamer is offline  
0
Reply With Quote
      06-03-2008, 11:51 PM   #46
sturgis
Enlisted Member
 
Drives: 135i
Join Date: Jun 2008
Location: FL

Posts: 44
iTrader: (0)

Custom Exhaust

I've been watching this thread for a while and was thinking about doing an exhaust on a budget. I removed the resonator today and swapped for a custom made Y pipe, unfortunately there were no noticeable gains in sound quality. I work as an assistant to a mechanic so I have access to lots of toys(tools) and have been thinking about cutting open the stock muffler and removing some or all of the baffles and then welding her back up and seeing how she sounds. Any thoughts? has anyone done this before?

While removal of the stock resonator didn't yield any sound gains it does weigh about 10lbs so I guess I did a minor weight reduction for $65 today.

Sorry about the picture quality i'll try and get a better shot of the internals tomorrow when the sun is up.
Attached Images
 
sturgis is offline  
0
Reply With Quote
      06-04-2008, 12:51 AM   #47
Bullitt
Captain
 
Bullitt's Avatar
 
Drives: 135i
Join Date: Apr 2008
Location: SF Bay Area

Posts: 963
iTrader: (15)

Garage List
2008 135i  [0.00]
Quote:
Originally Posted by Sturgis View Post
I've been watching this thread for a while and was thinking about doing an exhaust on a budget. I removed the resonator today and swapped for a custom made Y pipe, unfortunately there were no noticeable gains in sound quality. I work as an assistant to a mechanic so I have access to lots of toys(tools) and have been thinking about cutting open the stock muffler and removing some or all of the baffles and then welding her back up and seeing how she sounds. Any thoughts? has anyone done this before?

While removal of the stock resonator didn't yield any sound gains it does weigh about 10lbs so I guess I did a minor weight reduction for $65 today.

Sorry about the picture quality i'll try and get a better shot of the internals tomorrow when the sun is up.
I believe nobody in this forum has mentioned having done this before. We would be very interested in seeing how it would sound after being debaffled. It's worth a try!
Bullitt is offline  
0
Reply With Quote
      06-04-2008, 11:29 PM   #48
sturgis
Enlisted Member
 
Drives: 135i
Join Date: Jun 2008
Location: FL

Posts: 44
iTrader: (0)

of course it's worth a try, It's always worth a try when it's not your car!
sturgis is offline  
0
Reply With Quote
      06-05-2008, 12:54 AM   #49
Bullitt
Captain
 
Bullitt's Avatar
 
Drives: 135i
Join Date: Apr 2008
Location: SF Bay Area

Posts: 963
iTrader: (15)

Garage List
2008 135i  [0.00]
Quote:
Originally Posted by Sturgis View Post
of course it's worth a try, It's always worth a try when it's not your car!
You're also one of the few who has access to all the right tools to do this. :wink:
If you were nearby, I would offer you to try it on my car. I'm replacing the exhaust/muffler anyway.
Bullitt is offline  
0
Reply With Quote
      06-05-2008, 01:39 AM   #50
Wraith
Captain
 
Drives:
Join Date: Jun 2008

Posts: 814
iTrader: (0)

Quote:
Originally Posted by dim135 View Post
i prefer the cpe sound but the tips are more beautifull in corsa
+ 1 Agree

After viewing all those sound clips, for my ears the CP-e sounds the best, but the Corsa looks the best, ie: the twin tips...

Maybe you could get a different/nicer looking set of tips installed on the CP-e system ??

Do any of these void warranty ??

Wonder if these or similar are or will be available in all countries ??
Wraith is offline  
0
Reply With Quote
      06-05-2008, 02:03 AM   #51
Riss Racing
Banned
 
Drives: E60 M5/E92 335/HUMMER H2
Join Date: Jun 2007
Location: Irvine, CA

Posts: 2,650
iTrader: (7)

Send a message via AIM to Riss Racing Send a message via Skype™ to Riss Racing
Thumbs up Riss Racing Catless Downpipe exhaust sound!

Riss Racing is offline   United_States
0
Reply With Quote
      06-05-2008, 11:23 AM   #52
ScottyGams
Uber-Lee7 Member
 
ScottyGams's Avatar
 
Drives: E92 M3
Join Date: Jun 2007
Location: NYC

Posts: 1,440
iTrader: (2)

hahaha, i like the parking garage, trees, and streetlights that border your "street-legal racetrack"!
ScottyGams is offline   United_States
0
Reply With Quote
      06-10-2008, 11:51 PM   #53
Ilia@IND
BMW obsessed
 
Ilia@IND's Avatar
 
Drives: F10 M5
Join Date: Oct 2006
Location: Chicago

Posts: 2,163
iTrader: (3)

The Eisenmann system is almost done with R&D and should be available in the next few months. It will be a great option for the 1 series guys and is sure to carry the great sound that Eisenmann is known for. I'll keep you all posted and video will be available as soon as we get a prototype in the USA.
Ilia@IND is offline  
0
Reply With Quote
      06-11-2008, 11:39 PM   #54
professor
Major
 
Drives:
Join Date: Mar 2008

Posts: 1,472
iTrader: (0)

Anthony can you suggest whether you will be offering both race and sport versions for the 1 or just one?
professor is offline  
0
Reply With Quote
      06-17-2008, 07:24 PM   #55
Socrates.Tii
YEAR ONE OF THE ONE
 
Socrates.Tii's Avatar
 
Drives: 135i tii
Join Date: Apr 2008
Location: New York

Posts: 915
iTrader: (0)

Quote:
Originally Posted by Anthony View Post
The Eisenmann system is almost done with R&D and should be available in the next few months. It will be a great option for the 1 series guys and is sure to carry the great sound that Eisenmann is known for. I'll keep you all posted and video will be available as soon as we get a prototype in the USA.
hell yeaaaaa Eisenmann all the wayyyy
Socrates.Tii is online now  
0
Reply With Quote
      06-17-2008, 07:25 PM   #56
Socrates.Tii
YEAR ONE OF THE ONE
 
Socrates.Tii's Avatar
 
Drives: 135i tii
Join Date: Apr 2008
Location: New York

Posts: 915
iTrader: (0)

Quote:
Originally Posted by professor View Post
Anthony can you suggest whether you will be offering both race and sport versions for the 1 or just one?
i am sure that there will be a sport version and a race version
like always
Socrates.Tii is online now  
0
Reply With Quote
      06-17-2008, 07:43 PM   #57
blklacker
Captain
 
blklacker's Avatar
 
Drives: 135i
Join Date: Apr 2008
Location: seattle

Posts: 656
iTrader: (0)

Quote:
Originally Posted by Sturgis View Post
I've been watching this thread for a while and was thinking about doing an exhaust on a budget. I removed the resonator today and swapped for a custom made Y pipe, unfortunately there were no noticeable gains in sound quality. I work as an assistant to a mechanic so I have access to lots of toys(tools) and have been thinking about cutting open the stock muffler and removing some or all of the baffles and then welding her back up and seeing how she sounds. Any thoughts? has anyone done this before?

While removal of the stock resonator didn't yield any sound gains it does weigh about 10lbs so I guess I did a minor weight reduction for $65 today.

Sorry about the picture quality i'll try and get a better shot of the internals tomorrow when the sun is up.
Isnt that picture a Catalytic converter??? I thought the 2 resonators are right before the Cat??
__________________

-135i BSM, CRBL ,custom front lip/Indianapolis red fade, blacked out tail lights/corner headlights, golf tee, BMS Air intake, SSTT, CF spoiler,Powdered coated OEM rims gunmetal high gloss,custom Rear diffuser Black/Indianapolis red fade
blklacker is offline  
0
Reply With Quote
      06-17-2008, 08:04 PM   #58
Bullitt
Captain
 
Bullitt's Avatar
 
Drives: 135i
Join Date: Apr 2008
Location: SF Bay Area

Posts: 963
iTrader: (15)

Garage List
2008 135i  [0.00]
Quote:
Originally Posted by blklacker View Post
Isnt that picture a Catalytic converter??? I thought the 2 resonators are right before the Cat??
Yes, that is the catalytic converter.

EDIT: To correct myself, that is the resonator.

.
Attached Images
 
Bullitt is offline  
0
Reply With Quote
      06-18-2008, 09:38 PM   #59
blklacker
Captain
 
blklacker's Avatar
 
Drives: 135i
Join Date: Apr 2008
Location: seattle

Posts: 656
iTrader: (0)

Quote:
Originally Posted by Bullitt View Post
Yes, that is the catalytic converter.

.
Soooo. Wouldn't that throw a serious Code???
__________________

-135i BSM, CRBL ,custom front lip/Indianapolis red fade, blacked out tail lights/corner headlights, golf tee, BMS Air intake, SSTT, CF spoiler,Powdered coated OEM rims gunmetal high gloss,custom Rear diffuser Black/Indianapolis red fade
blklacker is offline  
0
Reply With Quote
      06-19-2008, 09:36 AM   #60
Strongbark
Brigadier General
 
Strongbark's Avatar
 
Drives: 2015 M4 on order
Join Date: Jan 2008
Location: Earth

Posts: 3,630
iTrader: (1)

Quote:
Originally Posted by blklacker View Post
Soooo. Wouldn't that throw a serious Code???
No. My header back (preliminary catback) setup doesn't not throw any codes.
Strongbark is offline   No_Country
0
Reply With Quote
      06-19-2008, 04:52 PM   #61
Bullitt
Captain
 
Bullitt's Avatar
 
Drives: 135i
Join Date: Apr 2008
Location: SF Bay Area

Posts: 963
iTrader: (15)

Garage List
2008 135i  [0.00]
Quote:
Originally Posted by blklacker View Post
Soooo. Wouldn't that throw a serious Code???
The pic is misleading. He was referring to the muffler.
Bullitt is offline  
0
Reply With Quote
      06-21-2008, 08:31 PM   #62
Texas
Private First Class
 
Texas's Avatar
 
Drives:
Join Date: Apr 2008

Posts: 153
iTrader: (0)

Quote:
Originally Posted by blklacker View Post
Isnt that picture a Catalytic converter??? I thought the 2 resonators are right before the Cat??
That picture is not the cat. There are 4 cats on the 135i. One in each downpipe and then one in each pipe before the 2 pipes converge at the resonator. Sturgis cut off the resonator an that is the picture that he posted.
__________________
Texas is offline  
0
Reply With Quote
      06-25-2008, 11:33 PM   #63
sturgis
Enlisted Member
 
Drives: 135i
Join Date: Jun 2008
Location: FL

Posts: 44
iTrader: (0)

Thank you Texas, that is the resonator that I removed. And Blklacker, out of the 4 cats only the foreward two have o2 sensors, so technically the 2 cats located further aft can be removed w/o a throwing any codes or cel's

a quick update: after driving with the resonator removed for a few weeks now, I would not advise it as there is more resonance (who could have guessed) and a slightly tinier raspy sound, it is hard to notice, but especially prominent when the motor is cold and the A/C is running. I am currently on a short vacation, but will be re-installing the resonator when I get home.

Debaffling the muffler: I have done some research on how muffler's work and have found that there are (correct me if im wrong) two main types of mufflers one uses glass (fibers) as insulation and the other uses a series of chambers (usually two). I am worried that BMW employs the later, the issue being that there simply aren't any baffles to cut out if this is the case. Thats because this design uses an entry hole and a resonation chamber to cancel sound before the sound waves exit through the exhaust pipe (tips). The reason the sound cancelation works is due to the size of the chamber which is precisely engineered to cancel noise by bouncing incoming waves off a wall and inversely matching the incoming wavelength. In theory, in order for it to work incoming trough's much match outgoing crests precisely.

If you have no Idea what I'm trying to say check here http://auto.howstuffworks.com/muffler4.htm

Anyways: I may be putting this experiment on hold, until I have the funds to buy an aftermarket system outright if I screw things up, Unless someone can enlighten me on the inards of the stock muffler then I would be happy to try it.
sturgis is offline  
0
Reply With Quote
      06-26-2008, 04:32 AM   #64
Bullitt
Captain
 
Bullitt's Avatar
 
Drives: 135i
Join Date: Apr 2008
Location: SF Bay Area

Posts: 963
iTrader: (15)

Garage List
2008 135i  [0.00]
As you may know, the BMW performance exhaust removes this resonator. I'm wondering if the performance exhaust's muffler offsets any raspiness that you refer to. I'm really curious to hear how the performance exhaust sounds with the resonator intact.
Bullitt is offline  
0
Reply With Quote
      07-06-2008, 04:17 AM   #65
DRosS
Private
 
DRosS's Avatar
 
Drives: 02 VF34 WRX
Join Date: Nov 2007
Location: Irvine, CA

Posts: 53
iTrader: (0)

Here's a new one...and it so happens to be my fav. I already have it on order. Riss Racing 135i Catback:
DRosS is offline   United_States
0
Reply With Quote
      07-08-2008, 02:24 AM   #66
frimmelnojerz
Captain
 
frimmelnojerz's Avatar
 
Drives: Montego blue 135i
Join Date: Jun 2008
Location: Bayonne, NJ

Posts: 692
iTrader: (0)

Send a message via AIM to frimmelnojerz
2nd on that^ i was just about to post a link to it.
__________________
08' 135 in much need of some TLC.
But after that... Watch out.
AA/Berk/ER/UR/CP-e/Snow/ESS
frimmelnojerz is offline   United_States
0
Reply With Quote
Post 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 02:00 AM.




1addicts
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