Questions about muffler flow direction/size - E46Fanatics E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 05-14-2010, 02:44 PM   #1
tylerc
Registered User
 
Join Date: Apr 2007
Location: iowa
Posts: 143
My Ride: 330ci
Questions about muffler flow direction/size

I am about to delve into my custom exhaust build that I have been dreaming about for the past year or so (progress has been slow) and I have a big pile of parts sitting in my garage. I have 4 3"-18" louvered glasspacks, modified an exhaust cutout, have from another project an older 2.5" dynomax turbo muffler and some assorted 3" tubing. Basically I am going to join two of the glasspacks in the front to make one 36" right after the headers and hopefully fit the other 2 in where I need straight sections. I have a couple of questions before I start:

The glasspacks said that the flow should go through the muffler so it hits the louvers like this:

---\----\---\---\
--->
___/___/___/__/

I was wondering if I would get any extra noise reducton if it hit them like this
---/---/---/---/
--->
___\__\__\__\

I know it wouldn't flow as well but I really doubt it would make any power difference as the louvers are pretty small cross section wise. I just wouldn't want it to flow worse and be the same/noisier

The second question is: I was going to use the dynomax turbo because A.) I have it and B.) I would think it would quiet the exhaust down more then a 3" muffler of the same type, am I correct? The cutout is one I can adjust from inside the car and will dump right before it knecks down to 2.5" for the muffler, so I don't think I should be worried about it being a flow restriction...

Thanks!
tylerc is offline   Reply With Quote
Old 06-05-2010, 04:29 PM   #2
tylerc
Registered User
 
Join Date: Apr 2007
Location: iowa
Posts: 143
My Ride: 330ci
Bringing this up from the dead again, going to start it on sunday and way to get some input before I do

TIA for the help!
tylerc is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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
Censor is OFF



All times are GMT -5. The time now is 09:00 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
(c) 1999 - VerticalScope Inc. All rights reserved.