E90Post
 


Extreme Powerhouse
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Has anyone ever burned up/clogged their cats before?



Reply
 
Thread Tools Search this Thread
      11-17-2010, 05:01 PM   #1
vegasspeed
Captain
vegasspeed's Avatar
United_States
84
Rep
761
Posts

Drives: 335i 6MT coupe Montego Blue
Join Date: Apr 2008
Location: Las Vegas

iTrader: (1)

Has anyone ever burned up/clogged their cats before?

I have a NSX that is super charged and they reccommend not putting hiflo cats on the car with forced induction because the standalones tend to run rich and clog the cats. Is there any chance that would happen with a 335i with downpipes and hi flow cats? Comments?

also, how often do people here throw a SES light during their ownership?
__________________
335i coupe Montego Blue Dinan stage 3 tune, Advan RS wheels 350whp/365wtq
1994 Brooklands Green Acura NSX Comptech Supercharged 390whp/300wtq
Appreciate 0
      11-17-2010, 05:09 PM   #2
Jeff@TopGearSolutions
Jeff@TopGearSolutions's Avatar
United_States
3474
Rep
79,211
Posts

Drives: C6 Z06, 09 335i, 10 335xi
Join Date: Dec 2008
Location: www.TopGearSolutions.com

iTrader: (37)

A fully tuned standalone on any car should not clog cats... sounds like it might be tuned obnoxiously rich in that case.

Anyway I dont hear much about clogging cats around here if ever at all.

This car is direct injection, so it runs leaner then your standard port fuel injection car even with forced induction.

Most port injection cars (forced induction added) run between 11-11.9 Air fuel, where as these cars run as lean as 12.5 seamlessly.

SES lights? What is your real question?

Last edited by Jeff@TopGearSolutions; 11-17-2010 at 05:14 PM..
Appreciate 0
      11-17-2010, 11:05 PM   #3
stratplaya06
Captain
stratplaya06's Avatar
United_States
47
Rep
967
Posts

Drives: 2008 E92 335xi-SOLD 5.0 Miata
Join Date: May 2008
Location: Maryland

iTrader: (10)

My dad burned up the cats on his e60 m5 at 80k miles, but apparently those cars inherently run rich. Cost for two new headers was 12,000 bucks. BMW did a good will repair, which was awesome. Haven't heard about any issues with n54 powered cars though.
__________________

| PROcede Rev3 | Vishnu Meth | DCI | BMW Perf. Exhaust | AR Coated/Catless | CP-E FMIC | Quaife |
Appreciate 0
      11-17-2010, 11:15 PM   #4
BrianMN
Banned
117
Rep
2,428
Posts

Drives: 4 Door Family Sedan
Join Date: Sep 2009
Location: Minneapolis

iTrader: (7)

The only time I've known to burn up cats is by running significant amounts of leaded race gas
Appreciate 0
      11-18-2010, 12:13 AM   #5
Bimmer This
Major General
103
Rep
6,473
Posts

Drives: 2007 BMW 335i
Join Date: Nov 2008
Location: Westminster

iTrader: (3)

any car running extremely rich will eventually clog cats. Sounds like your NSX isn't properly tuned. You wouldn't happen to know how much air/fuel ratio it is running woud you?
Appreciate 0
Reply

Bookmarks


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



All times are GMT -5. The time now is 10:10 AM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
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