How To Quiet Down Cobra Exhaust

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Page 1 of 2 1 2 > LinkBack Thread Tools Display Modes #i (permalink) 09-29-2011, 09:21 PM garry viohl CC Fellow member Bring together Date: December 2006 Cobra Make, Engine: Posts: 96 Non Ranked My frazzle is too loud - how to make quieter? I know, near people desire louder. But I call up the machine is too loud around town. 482 cid Atomic number 26 cam is 240/246 110 lobe sep 18 inch long glasspacks (with packing) with louvers pointed with air menses 3 inch pipes I have installed dynatech vortex insert cones at inlet of muffler they claim 2-iii decibel reduction I bought 2 more and installed them in the tailpipe, cant hear much divergence I idea of installing heavy steel wool in front end of cones, front and back Any ideas? Thanks. Sponsored Links  (REGISTERED USERS Practice NOT Meet THIS Postal service/Advertizing! Register now for free!) Advertizement Sponsored Links #2 (permalink) 09-29-2011, 10:34 PM menace1 CC Member Join Engagement: Jul 2009 Posts: 110 Non Ranked Your kidding right? Be loud and proud I say...Otherwise install a undercarriage frazzle organization or one of those Tesla motors may practise the play a trick on. #3 (permalink) 09-29-2011, 11:26 PM Jeff Frigo CC Member Join Engagement: Aug 2000 Location: Chicago, IL Cobra Make, Engine: ERA 454 S.O. Posts: 1,684 Non Ranked __________________ J e f f �If you lot tin make black marks on a direct from the time you turn out of a corner until the braking point of the side by side turn, and then y'all take plenty horsepower.� Mark Donahue #4 (permalink) 09-xxx-2011, 12:42 AM tkb289 Senior Social club Cobra Member Bring together Appointment: Dec 2007 Cobra Make, Engine: ERA FIA 'Street' Build Posts: 2,105 Not Ranked Garry, I practice not have whatever straight personal feel or affiliation, merely understand that Stainless Specialties makes custom mufflers with a ceramic acoustic liner that co-ordinate to their web site has a 'subdued sound with corking flow'. Hither is a link to their web site if you are interested ... Stainless Steel exhaust components� - Tim __________________ 289 FIA --- ERA 2136 Build Log: http://world wide web.clubcobra.com/forums/era-...build-log.html #5 (permalink) 09-30-2011, 04:02 AM mdross1 CC Member Join Date: Nov 2001 Location: Windham,, Me Cobra Make, Engine: Posts: i,590 Not Ranked Quote: Originally Posted past tkb289 Garry, I do not have any direct personal feel or amalgamation, simply empathize that Stainless Specialties makes custom mufflers with a ceramic acoustic liner that according to their web site has a 'subdued sound with nifty period'. Here is a link to their web site if yous are interested ... Stainless Steel exhaust components� - Tim My option was abdomen exhaust using custom mufflers from Stainless Specialties dear the sound and the operation out of 460ci. #6 (permalink) 09-xxx-2011, 05:11 AM SunDude CC Member Join Engagement: Jul 2006 Location: Ottawa, ON Cobra Brand, Engine: 2002 Superformance westward/392 stroker Posts: ane,593 Not Ranked Quote: Originally Posted past Jeff Frigo +1 This is the correct answer IMO. __________________ "Anyone who drives faster than you is a Maniac, and anyone who drives slower is an Idiot." - George Carlin #7 (permalink) 09-30-2011, 05:16 AM mickmate Senior Club Cobra Member Join Date: Sep 2000 Location: Holderness, NH, The states of A, NH Cobra Make, Engine: CSX 4772 old fe FE Posts: v,499 Not Ranked Brand them 2-1/ii" 10 24" with the louvres facing the motor. Classic Chambered Exhaust Inc. - Products The 2524's __________________ mickmate http://world wide web.actoncustom.com/ #8 (permalink) 09-30-2011, 05:40 AM patrickt Half-Donkey Member Bring together Engagement: Jun 2005 Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Apartment Tappet Cam, Tons of Aluminum Posts: 21,512 Not Ranked Gary, I think the accented truth of the matter is you're going to have to get new pipes made. I have the Stainless Specialties "quieter pipes" and they do pretty well. Curt of new pipes, everything else is a simply a gimmick. __________________ ERA #732 - Pics from the ERA Owners Gallery ERA #732 - Idling & Accelerating... #nine (permalink) 09-thirty-2011, 06:45 AM Academic CC Member Join Date: Oct 2010 Cobra Make, Engine: Superformance Posts: 663 Not Ranked Quote: Originally Posted by mickmate Make them 2-one/two" x 24" with the louvres facing the motor. Classic Chambered Exhaust Inc. - Products The 2524's Mickmate, you accept a lot of experience with the Classic Chambered. I'g running the 3" (louvers facing the motor) on a 22" case and they sound neat at idle only sound "less Cobra-like" on moderate/hard acceleration. In your opinion does your suggestion above get the overall sound dorsum to that classic Cobra gurgle throughout the rpm range? It'south really hard finding well-prepared audio clips on some of these options. Last edited by ACademic; 09-30-2011 at 06:50 AM.. #10 (permalink) 09-30-2011, 07:12 AM CHRIS DAMSCH CC Member Bring together Date: Sep 2003 Location: WEST SUBURBS OF CHICAGO, IL Cobra Make, Engine: SPF 1454 Posts: one,137 Non Ranked Add twin turbo's. That should serenity it downwards. Or put a cam in with a 114 lobe separation and lower your compression a little. __________________ CHRIS Last edited by CHRIS DAMSCH; 09-30-2011 at 07:xv AM.. Reason: Add imfo #eleven (permalink) 09-thirty-2011, 08:23 AM bobcowan CC Member Join Date: February 2007 Location: Colorado Springs, CO Cobra Make, Engine: Backdraft, supercharged Coyote Posts: 2,386 Not Ranked A while back I welded in a set of mufflers from Classic Chambered. They wait skillful, and sound slap-up. Definatly a reduction in noise levels. More importantly, the sound is a trivial deeper, without the harsh "blatt" of the stock FFR mufflers. Pretty inexpensive, too. Classic Chambered says they brand more power, but I can't say one mode or the other on that. I wear earplugs for whatsoever trip more than x-15 minutes. The exhaust annotation is fairly placidity. But wind and tire noise will wearable you lot out; especially on a concrete roadway. __________________ .boB "Iron Human being" NASA Rocky Mountain TTU #42 www.RacingtheExocet.com BDR #1642 - Supercharged Coyote, six speed Motorcar #12 (permalink) 09-thirty-2011, 05:45 PM Jeff Frigo CC Fellow member Join Engagement: Aug 2000 Location: Chicago, IL Cobra Brand, Engine: ERA 454 S.O. Posts: one,684 Not Ranked Quote: Originally Posted by patrickt Gary, I think the absolute truth of the matter is y'all're going to have to get new pipes made. I have the Stainless Specialties "quieter pipes" and they do pretty well. Short of new pipes, everything else is a only a gimmick. I have talked to guys in who race A Production cars (encounter beneath) in vintage races that swear that these piece of work well with piffling to no loss in power. Dynatech Accessories - Auger Style Muffler A-Production Air-conditioning Cobra (427cid) 1970-72 Chevrolet Corvette 350cid 1965-67 Chevrolet Corvette 427cid 1968-72 Chevrolet Corvette 427/454cid DeTomaso Pantera 351cid Ford Boss 429 429cid Shelby GT-500 428cid __________________ J due east f f �If you tin make black marks on a directly from the time you plough out of a corner until the braking point of the side by side plough, then you have enough horsepower.� Mark Donahue Last edited by Jeff Frigo; 09-thirty-2011 at 05:51 PM.. #13 (permalink) 09-30-2011, 05:54 PM patrickt Half-Ass Member Join Date: Jun 2005 Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum Posts: 21,512 Non Ranked Quote: Originally Posted by Jeff Frigo I take talked to guys in who race A Product cars (see below) in vintage races that swear that these work well with little to no loss in power. Dynatech Accessories - Auger Style Muffler I've heard that too. Just there have also been threads on hither where guys accept tried them and said just the opposite. I likewise suspect that the psychological force of "believing they work," after you've gone to the problem of buying and installing them, might also come in to play. I know I had been around more than one Cobra that merely plain hurt my ears (from both outside the motorcar, and inside) so I dealt with the issue when SS was fabbing the pipes. I actually similar their "quieter pipes" on my Fe, but it'south going to cost him a couple of bucks. On the other paw the auger inserts are just $15, so WTF, he might besides give it a shot I suppose. __________________ ERA #732 - Pics from the ERA Owners Gallery ERA #732 - Idling & Accelerating... #14 (permalink) 09-xxx-2011, 06:55 PM Dwight Senior Society Cobra Member Bring together Date: May 2001 Location: Florence, AL Cobra Make, Engine: RCR GT xl & 1966 Fairlane 390 five speed Posts: four,511 Not Ranked Classic mufflers I replaced my 2 i/2" x 24" mufflers (louvers facing abroad from motor) with Classic iii" x 28" (louvers facing the motor). They are a lot quieter and still sound like a Cobra, deep rumble at idle. Dwight __________________ ''Life's tough.....it's even tougher if you lot're stupid.'' ~ John Wayne "Happiness Is A Belt-Fed Weapon" life's goal should be; "to be smarter than inanimate objects" #xv (permalink) 09-thirty-2011, 08:32 PM mickmate Senior Club Cobra Member Join Date: Sep 2000 Location: Holderness, NH, The states of A, NH Cobra Make, Engine: CSX 4772 old iron FE Posts: 5,499 Non Ranked I have tried the Stainless Specialties mufflers, Hedmans and keep coming back to the Archetype Chambered. I have establish even the iii" x 21" with louvres facing the tailpipes go far relatively like shooting fish in a barrel to drive and still exist able to hold a chat with the rider. Equally pointed out the wind and route noise starts to override exhaust noise at speed anyhow. I similar the tone of the Classics it'southward a deeper smoother sound with good pharynx but it certain makes that right pedal a volume control. This is Davids FE with the Classic 3" louvres facing back. See what I mean about wind noise! Cobra in Maryland - YouTube __________________ mickmate http://world wide web.actoncustom.com/ #16 (permalink) 09-30-2011, 08:45 PM Jeff Frigo CC Member Join Date: Aug 2000 Location: Chicago, IL Cobra Make, Engine: ERA 454 Southward.O. Posts: one,684 Non Ranked Quote: Originally Posted by patrickt I've heard that as well. Simply there accept also been threads on hither where guys have tried them and said just the opposite. I likewise doubtable that the psychological force of "believing they piece of work," subsequently you've gone to the trouble of buying and installing them, might also come in to play. I know I had been around more than than one Cobra that just plain hurt my ears (from both outside the auto, and within) so I dealt with the event when SS was fabbing the pipes. I really similar their "quieter pipes" on my FE, but it's going to price him a couple of bucks. On the other hand the auger inserts are just $15, and then WTF, he might likewise give information technology a shot I suppose. Patrickt: I take not been able to find everyone on the forum that has tried them. I accept searched. Do you think you could detect that thread. I was planning on trying them this winter, but if they are NG, I would like to save my money. $15.00 is no prodigious, but the rest of the process for existing ceramic coated pipes are. __________________ J e f f �If you can make black marks on a straight from the time you plow out of a corner until the braking point of the next turn, then you have enough horsepower.� Mark Donahue #17 (permalink) 10-01-2011, 04:12 AM undy CC Member Bring together Date: Jul 2005 Location: Virginia Beach, Va & Port Charlotte, Fl., Posts: 2,254 Not Ranked I had the "auger" style mufflers on my ride and picked upwardly 40 rwhp (and a small amount of noise) when I went to the Classic Chambered exhaust. There's just too much frazzle impingement with the spiral style... __________________ Too many toys?? never! #18 (permalink) 10-01-2011, 05:09 AM Jeff Frigo CC Fellow member Bring together Appointment: Aug 2000 Location: Chicago, IL Cobra Make, Engine: ERA 454 Southward.O. Posts: 1,684 Not Ranked Quote: Originally Posted by undy I had the "auger" style mufflers on my ride and picked upwards forty rwhp (and a small amount of noise) when I went to the Classic Chambered exhaust. At that place'due south just too much exhaust impingement with the spiral way... What was the hp diff with the chambered? Pleases explain exhaust impingement. __________________ J e f f �If you can make black marks on a directly from the time you turn out of a corner until the braking signal of the next turn, and so you have enough horsepower.� Marking Donahue #xix (permalink) ten-01-2011, 06:45 AM Mdman352 CC Member Join Date: November 2007 Cobra Brand, Engine: Contemporary-427 stroker Posts: 349 Not Ranked This is with the Cobra Pak. mdman352's Channel - YouTube this is with any came with the Contemporary pipes. mdman352's Channel - YouTube #xx (permalink) 10-01-2011, 07:37 AM Jeff Frigo CC Fellow member Bring together Date: Aug 2000 Location: Chicago, IL Cobra Brand, Engine: ERA 454 Due south.O. Posts: one,684 Non Ranked Quote: Originally Posted by Mdman352 This is with the Cobra Pak. mdman352's Channel - YouTube this is with any came with the Contemporary pipes. mdman352's Channel - YouTube Sounds the aforementioned, perhaps a touch quieter with the first ane. __________________ J e f f �If you lot can make blackness marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough horsepower.� Mark Donahue Page 1 of 2 1 two > « Previous Thread | Next Thread » Posting Rules You may not mail service new threads Y'all may non post replies You may non mail attachments You may non edit your posts BB code is On Smilies are On [IMG] code is On HTML lawmaking is Off Trackbacks are On Pingbacks are On Refbacks are On Forum Rules All times are GMT -vii. The fourth dimension now is 06:10 AM. Contact Us - Club Cobra Dwelling - Archive - Top Powered by vBulletin® Version 3.8.0 Copyright ©2000 - 2022, Jelsoft Enterprises Ltd. 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