E90Post
 


GTB Performance
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > N55 secondary cats?



Reply
 
Thread Tools Search this Thread
      11-14-2010, 08:56 PM   #1
CPWINCH
Brigadier General
 
CPWINCH's Avatar
 
Drives: F32 4 Series
Join Date: May 2010
Location: Los Angeles

Posts: 3,516
iTrader: (5)

N55 secondary cats?

I was reading a thread about catless dps for N55 some one said good luck passing emissions testing because N55 has no secondary cats. To me this sounds wrong but is it true? Does N55 not have secondary cats?
__________________
Follow my BMW instagram @Bmwmodification!! Let me know you are from bimmerpost and i'll follow back
CPWINCH is offline   United_States
0
Reply With Quote
      11-14-2010, 10:39 PM   #2
BMWDude49120
Second Lieutenant
 
BMWDude49120's Avatar
 
Drives: 2014 X3 35i M Sport
Join Date: May 2010
Location: Niles, MI

Posts: 225
iTrader: (0)

Correct; the N55 has no secondary cats.
BMWDude49120 is offline   United_States
0
Reply With Quote
      11-14-2010, 11:11 PM   #3
shockin330i
Brigadier General
 
Drives: blue
Join Date: Jan 2007
Location: f y'all, I'm from Texas (RGV)

Posts: 4,198
iTrader: (1)

We don't test for emissions around these parts...
__________________
ERnie 2011 AW/e90/n55 12.9@107.53mph
*N55 Moderator*
I'm crawling similar to a ant cuz I'm low to the earth
shockin330i is online now  
0
Reply With Quote
      11-14-2010, 11:18 PM   #4
Army X5 S5
Lieutenant Colonel
 
Army X5 S5's Avatar
 
Drives: '11 X5 35i / '13 S5
Join Date: Jun 2009
Location: Deployed to Kuwait

Posts: 1,752
iTrader: (2)

Quote:
Originally Posted by CPWINCH View Post
I was reading a thread about catless dps for N55 some one said good luck passing emissions testing because N55 has no secondary cats. To me this sounds wrong but is it true? Does N55 not have secondary cats?
N55's have a two stage cat on the down pipe... what I mean is, it's two cats, built into one system... There are no 2nd cats like what you would see on a N54 system... ALthough if you have an N55 335xi it seems like you have some resonators (that look awfully like cats)
__________________

BMW X5 35i: Boopie Exhaust, Boopie Intercooler, K&N Drop in Filter...
Audi S5 2013 (Delivery Sept 2013): Mods pending review
Army X5 S5 is offline   No_Country
0
Reply With Quote
      11-14-2010, 11:18 PM   #5
Diggy Diggy
First Lieutenant
 
Diggy Diggy's Avatar
 
Drives: 135i
Join Date: Mar 2009
Location: Kentucky

Posts: 341
iTrader: (2)

Garage List
2008 BMW 135i  [0.00]
Quote:
Originally Posted by shockin330i View Post
We don't test for emissions around these parts...
Ditto. You can run open headers here...
Diggy Diggy is offline  
0
Reply With Quote
      11-15-2010, 12:55 AM   #6
FrankiE90
Major General
 
FrankiE90's Avatar
 
Drives: Krooked Sk8board
Join Date: Feb 2008
Location: Pasadena, Ca

Posts: 8,640
iTrader: (11)

Send a message via Skype™ to FrankiE90
Quote:
Originally Posted by Spoolin View Post
Quote:
Originally Posted by shockin330i View Post
We don't test for emissions around these parts...
Ditto. You can run open headers here...
F'n lucky- I'm jealous.
__________________
FrankiE90 AKA:.[The TANK] *CLICK THE SIG
2011 335 E90 MTECH 6MT KW V3 INJEN Intake Berk 4" DP Vanguard V2 exhaust Procede V5 Stoptech BBK RPI Scoops Karbonwerk CSL Trunk LUX H8 19" BBS LM 18" BBS GT4
FrankiE90 is offline   United_States
0
Reply With Quote
      11-15-2010, 01:31 AM   #7
shockin330i
Brigadier General
 
Drives: blue
Join Date: Jan 2007
Location: f y'all, I'm from Texas (RGV)

Posts: 4,198
iTrader: (1)

Quote:
Originally Posted by FrankiE90 View Post
F'n lucky- I'm jealous.
says the guy with a baller car
__________________
ERnie 2011 AW/e90/n55 12.9@107.53mph
*N55 Moderator*
I'm crawling similar to a ant cuz I'm low to the earth
shockin330i is online now  
0
Reply With Quote
      11-15-2010, 03:39 AM   #8
FrankiE90
Major General
 
FrankiE90's Avatar
 
Drives: Krooked Sk8board
Join Date: Feb 2008
Location: Pasadena, Ca

Posts: 8,640
iTrader: (11)

Send a message via Skype™ to FrankiE90
Quote:
Originally Posted by shockin330i View Post
says the guy with a baller car


by the way.
downpipes not cats. N55
video from 1er page
http://www.1addicts.com/forums/showthread.php?t=453927


__________________
FrankiE90 AKA:.[The TANK] *CLICK THE SIG
2011 335 E90 MTECH 6MT KW V3 INJEN Intake Berk 4" DP Vanguard V2 exhaust Procede V5 Stoptech BBK RPI Scoops Karbonwerk CSL Trunk LUX H8 19" BBS LM 18" BBS GT4
FrankiE90 is offline   United_States
0
Reply With Quote
      11-15-2010, 03:55 AM   #9
shockin330i
Brigadier General
 
Drives: blue
Join Date: Jan 2007
Location: f y'all, I'm from Texas (RGV)

Posts: 4,198
iTrader: (1)

I did see that. I'm waiting on stett to call me so i can take them my car.
__________________
ERnie 2011 AW/e90/n55 12.9@107.53mph
*N55 Moderator*
I'm crawling similar to a ant cuz I'm low to the earth
shockin330i is online now  
0
Reply With Quote
      05-05-2013, 11:08 PM   #10
shagandyl
shagandyl@aol.com
 
Drives: E93 335i
Join Date: Apr 2010
Location: SoCal

Posts: 19
iTrader: (0)

Garage List
2009 e93 m3  [0.00]
Has anyone removed (gutted) half of the cats in the stock n55 down pipe ?
shagandyl is offline  
0
Reply With Quote
      05-08-2013, 12:04 AM   #11
ParkNuts
First Lieutenant
 
Drives: 2011 135i DCT
Join Date: Apr 2011
Location: Dallas

Posts: 331
iTrader: (0)

Quote:
Originally Posted by shagandyl View Post
Has anyone removed (gutted) half of the cats in the stock n55 down pipe ?
I've heard of people gutting the whole thing, which works decently but leads to turbulence in the stock pipe's geometry. Haven't heard of half gutting. Honestly, there are such cheap options available now you might as well pick up one of those and save the stock pipe if you need to go back. Besides, you can't fool your nose if your car smells like a go cart. Hollowing out the stock pipe is really just for trying to go stealth or reeealy cheap
ParkNuts is offline  
0
Reply With Quote
      05-08-2013, 11:26 AM   #12
madmanhiker
Lieutenant Colonel
 
madmanhiker's Avatar
 
Drives: '11 E92 335i
Join Date: Jul 2008
Location: Jacksonville, Fl

Posts: 1,558
iTrader: (3)

Garage List
Quote:
Originally Posted by shockin330i View Post
We don't test for emissions around these parts...
^ which is one of the VERY few items cool about Florida as well.
__________________
-madmanhiker jax,fl
madmanhiker is offline   United_States
0
Reply With Quote
      05-08-2013, 06:41 PM   #13
divisionbell77
Lieutenant
 
divisionbell77's Avatar
 
Drives: 2011 335i XDrive Coupe
Join Date: Mar 2012
Location: Ohio

Posts: 446
iTrader: (1)

I really hope someone figures out a DP fix for the N55.
divisionbell77 is offline  
0
Reply With Quote
      05-08-2013, 10:10 PM   #14
badblkX6
Captain
 
Drives: 2014 X6 35i
Join Date: Sep 2011
Location: South Jersey

Posts: 725
iTrader: (9)

Garage List
2014 BMW X6  [0.00]
Quote:
Originally Posted by madmanhiker
Quote:
Originally Posted by shockin330i View Post
We don't test for emissions around these parts...
^ which is one of the VERY few items cool about Florida as well.
.....and other cool things such as legal window tint and beautiful weather...........
badblkX6 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 02:54 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