I have a dumb question about removing the catalytic converter.. - Bimmerfest - BMW Forums

Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E36/7 Z3 (1996-2002)

E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 08-15-2005, 10:45 AM
TurnAround TurnAround is offline
Location: Oregon
Join Date: Jan 2004
Posts: 358
Mein Auto: Z3C, Z3R, X5
I have a dumb question about removing the catalytic converter..

At some point in my Coupe's life I might do some kind of exhaust mod. To get more growel. I heard a 3.0i Coupe at DFest that obviously had some kind of mod.. but I didn't have a chance to talk to the guy. But I take from this.. that there must be some after market options for the 3.0i.

But here's the real question; I was considering the mod only for sound, as I have read that an aftermarket exhaust provides very little HP gain. But then it ocurred to me... our city has no air pollution auto check stations. No regulations at all, and no one to follow up on your car's setup. Portland does, but none of the other towns in OR have a DEQ station. We will likely NEVER get one either.

Soooo.... can I remove my catalytic converter? If I did that, as part of a custom exhaust mod, then wouldn't this provide quite a bit extra HP?

My guess at this is that I can't just do this because the engine's electronics will freak out.. looking for feedback from sensors mounted near the converter. Yes??

Also, would it effect the life of the engine at all? If this were a late 70's to early 80's car, I wouldn't hesitate.. as there are no electronics relying on the presence of the converter. But my impression is that modern cars have highly integrated pollution control systems that constantly feedback info to the engine for fuel and air ratio changes.

My other dumb question; Why do they call some aftermarket exhaust systems "Catback". Is this a play on words. Marketing language that suggests that, "hey, with our muffler, we'll give you some of the power back that your catalytic converter is stealing from you!", and it really has nothing directly to do with the converter? Or, do these systems actually replace the catalytic converter or modify it somehow?

Thanks guys.

'02 Z3 Coupe 3.0i [Hellröt II - Walnuß]
'03 X5 3.0i [GrauGrün - Beige]
'01 Z3 Roadster 3.0i [AlpenWeiß - TraumRöt]
Reply With Quote

See More Related BMW Stories

Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E36/7 Z3 (1996-2002)
Today's Posts Search
Thread Tools
Display Modes

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 On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Aftermarket 540i Catalytic Converter Info kowached 5 Series DIY 4 03-22-2007 05:43 AM
Help find: Catalytic Converter BavarianWheels 5 Series 4 04-29-2004 03:58 PM
Removing catalytic converter for racing mgoulde Motorsports, Racing & Track 2 02-02-2004 04:58 PM
Catalytic Converter bm3w 1M & M2 2 12-22-2003 08:46 AM
Might seem dumb question but what is retrofit? b8hs 3 Series & 4 Series 1 02-05-2002 09:15 AM

All times are GMT -7. The time now is 06:16 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
© 2001- VerticalScope Inc. All rights reserved.