Club Cobra Gas-N Exhaust  

Go Back   Club Cobra > Manufacturers, Engine Builders, tools, and parts. > BackDraft Racing ---

Welcome to Club Cobra!  The World's largest non biased Shelby Cobra related site!

  •  » Representation from nearly all Cobra/Daytona/GT40 manufacturers
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and nearly 1 million posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

MMG Superformance
Nevada Classics
MMG Superformance
Main Menu
Module Jump:
Nevada Classics
Nevada Classics
Keith Craft Racing
Advertise at CC
Banner Ad Rates
MMG Superformance
Keith Craft Racing
MMG Superformance
MMG Superformance
May 2021
S M T W T F S
            1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 31          
  #1 (permalink)  
Old 04-14-2021, 10:17 AM
CC Member
Visit my Photo Gallery

 
Join Date: Mar 2021
Cobra Make, Engine: BackDraft
Posts: 7
Not Ranked     
Default Stock BDR exhaust from 2012

Question for the experts on side pipes. I know there are different schools of thought on exhaust modifications and the benefits. I stuck my phone down the pipes to see what was actually in there. I always assumed it was fairly wide open. To my surprise, it seems to have a baffling or ďsomethingĒ to that effect running down the pipe, wondering if this is considered restrictive on sound and power? My question(s) is: has anyone removed this, does it actually run the length of the entire pipe? If you have removed it, did it dramatically increase the sound (loudness) logic tells me it would but Iím not sure? Iíd be OK with louder:-) assuming it doesnít change the tone of the exhaust note. Iím considering having a shop cut the end off and see if this could be removed and then have the end welded back on where it exists.... just donít know if this is a wasted exercise for any actual changes.

Thanks!!
Mike
Attached Images
 
Reply With Quote
Sponsored Links
Sponsored Links
  #2 (permalink)  
Old 04-17-2021, 05:40 AM
spdbrake's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Dec 2015
Location: Lyman, SC
Cobra Make, Engine: BDR #53
Posts: 1,104
Not Ranked     
Default

Yes thats a normal BDR side pipe muffler. Two 7/8" glass pack tubes. I switched to Flowmaster Slimline mufflers a few years ago and unfortunately they don't make them any more. There are threads on this site detailing that.
https://www.holley.com/products/disc...parts/13524320

If you want to stay all stainless.
Your best bet is a set of stainless side pipes from Gas-n (advertises on this site) https://www.gas-n.com/
Or a set of Porter Standard length 26" x 3" or 3.5" in 304 stainless. Front/rear caps are a bit off for shape but that also depends on which vintage Cobra photos you compare it to.
USA made. https://portermufflers.com/collectio...13933683671098

Last edited by spdbrake; 04-17-2021 at 08:46 AM..
Reply With Quote
  #3 (permalink)  
Old 04-20-2021, 07:51 AM
SBSerpent's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jun 2020
Location: Santa Barbara, CA
Cobra Make, Engine: BDR build #983
Posts: 176
Not Ranked     
Default

I would have thought that this post would have garnered much more attention. I seem to recall a thread on this topic that 'lived' for several months with lots of feedback, mostly about issues/problems with the packing materials used in the BDR exhausts. I believe it was on the earlier versions (circa late 2000s, early 2010s?).
Reply With Quote
  #4 (permalink)  
Old 04-20-2021, 06:05 PM
CC Member
Visit my Photo Gallery

 
Join Date: Mar 2021
Cobra Make, Engine: BackDraft
Posts: 7
Not Ranked     
Default

Interesting... I wonder if the glass packs could be removed if I cut the curved end off then tried to pull them out, and then have it welded back. Does anyone know if the glass packs are somehow welded in the body of the muffler? Hoping they would pull right out and are more of a “pressure fit”. Would back pressure be a problem/issue if they were removed? Currently have a 427 stroker with 535hp. Exhaust back pressures are not my area of expertise :-)

Last edited by RT3BDR1144; 04-20-2021 at 06:19 PM..
Reply With Quote
  #5 (permalink)  
Old 04-20-2021, 07:07 PM
spdbrake's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Dec 2015
Location: Lyman, SC
Cobra Make, Engine: BDR #53
Posts: 1,104
Not Ranked     
Default

I'm pretty sure they're welded. But once you go that deep you're committed at that point to tear something up. If you are successful and are able to jerk the guts from the muffler cases, the tone the empty cases will make your neighbors, dogs, cats, small children hate you, and most likely Mr. Popo too.

These folks appear to make a muffler / turnout in stainless.
https://www.hotrodhotline.com/pr/201...es_side_pipes/
Or Firefly. Pricey for what you get though.
https://fireflyperformance.com/pipekit/index.htm
Reply With Quote
Reply

Thread Tools
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
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 05:08 PM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: CC Policy
Links monetized by VigLink