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Need a Quieter Muffler - Please Help
#1614632
05/01/14 05:05 PM
05/01/14 05:05 PM
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Joined: Jul 2007
Posts: 1,526
North Carolina
cjskotni
OP
pro stock
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OP
pro stock
Joined: Jul 2007
Posts: 1,526
North Carolina
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Guys, I am thinking about going to a quieter muffler on my Charger as it drones anywhere over 2500 RPM or so. I would like to be able to hold a conversation in the car without screaming while I drive down the road.  What's on there now are Flowmaster 40 series which sound awesome but this gets old after 10 minutes. I realize this won't be a quiet ride (499 stroker) but I want something quieter while still sounding somewhat 'throaty'. I have 3" exhaust from the headers to the tips. I have read that Dynomax has some good options but I see several types (VT, Turbo, UltraFlo, etc) and I am unsure of the difference. I need a muffler with a offset inlet and center outlet both at 3". I could go aluminized steel or stainless. Any recommendations for a somewhat quiet muffler, still sounds decent, for a STREET car? I don't care about absolute performance here, more for a nicer ride quality. 
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Re: Need a Quieter Muffler - Please Help
[Re: cjskotni]
#1614633
05/01/14 05:24 PM
05/01/14 05:24 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Dynomax (not sure which ones but I hear the VT (the one with the flap) that the spring rattles) plus some glasspacks alongside the rear leaf springs
live every 24 hour block of time like it's your last day on earth
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Re: Need a Quieter Muffler - Please Help
[Re: cjskotni]
#1614634
05/01/14 05:35 PM
05/01/14 05:35 PM
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Joined: Jan 2003
Posts: 13,354
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,354
Marion, South Carolina [><]
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The Dynomax VT does have issues w/ the flaps rattling. The Dynomax super turbos are much quieter, but hurt the power. Yes, it is noticeable. The Dynomax Ultra-Flow is a good choice. MORE flow and quieter than the Flowmaster 40. The Hooker Max Flow is basically the same thing as the Dynomax Ultra Flow. The Hooker Aero Chamber is a little quieter than the Ultra Flow and Max flow, but louder than the turbos. Still make great power though. These would be my choice if you want power, but reasonably quiet. 
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: Need a Quieter Muffler - Please Help
[Re: cjskotni]
#1614636
05/01/14 05:40 PM
05/01/14 05:40 PM
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Joined: Apr 2010
Posts: 79
CT
mastiffd
member
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member
Joined: Apr 2010
Posts: 79
CT
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Re: Need a Quieter Muffler - Please Help
[Re: cjskotni]
#1614638
05/01/14 05:57 PM
05/01/14 05:57 PM
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Joined: Jan 2003
Posts: 5,443
Indiana
YO7_A66
master
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master
Joined: Jan 2003
Posts: 5,443
Indiana
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If you are considering adding a new muffler and a glass pack, how about adding a second muffler to your existing exhaust and see if that helps?
1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)
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Re: Need a Quieter Muffler - Please Help
[Re: YO7_A66]
#1614639
05/01/14 07:19 PM
05/01/14 07:19 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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classic industries has magnaflow glasspacks: 18" shell/22" length/4" dia/3" inlet/outlet #18129 $51.99 ea with 15% off paying with visa "classic?". what YO7 said I'd add those before messing with the rest of the system. I've never run flowmasters but the flowbastards moniker the one guy put on em way back always stuck in my head, that they were way too noisy. yeah you gotta change something for your peace of mind
live every 24 hour block of time like it's your last day on earth
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Re: Need a Quieter Muffler - Please Help
[Re: cjskotni]
#1614640
05/01/14 07:38 PM
05/01/14 07:38 PM
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Joined: Aug 2003
Posts: 8,779
Mt.Gilead, Ohio
OhioMopar
master
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master
Joined: Aug 2003
Posts: 8,779
Mt.Gilead, Ohio
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I put 2.5" Pypes Violators on my Bee and it sounds awesome. I don't know how they flow, but looking through them, I would have to say well.
1969 Dart GTS 340
1969 Super Bee X9 N-96
1969 Coronet R/T X9 N-96
2015 Dodge Dart GT
2019 Ram 2500 Big Horn.
Looking for the original block for my Bee. The last 4 are 7449
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Re: Need a Quieter Muffler - Please Help
[Re: Dan Halen]
#1614644
05/01/14 09:45 PM
05/01/14 09:45 PM
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Joined: Jul 2007
Posts: 1,526
North Carolina
cjskotni
OP
pro stock
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OP
pro stock
Joined: Jul 2007
Posts: 1,526
North Carolina
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Thanks for the suggestions so far, guys! I am a bit ignorant in the science behind exhaust acoustics so please forgive me. Can simply adding the glasspack type mufflers behind the Flowmasters really quiet it down that much? I saw the Magnaflows and Dynomax has their version of these as well. I am alright with trying simply adding the glasspacks but I am wondering if I am not happy and then have to take it in again to swap the Flowmasters out, if I should just do everything at once? I hate to ditch these things as they sound so bad ace outside the car but the drone is just killing me. Anybody here just added the glaspacks behind a noisy muffler and gotten really good results or should I just swap out the Flowmasters as well? Would the Dynomax Ultra Flow + glasspacks be too quiet or still beefy enough? 
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Re: Need a Quieter Muffler - Please Help
[Re: davenc]
#1614648
05/01/14 11:34 PM
05/01/14 11:34 PM
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Joined: Jul 2007
Posts: 1,526
North Carolina
cjskotni
OP
pro stock
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OP
pro stock
Joined: Jul 2007
Posts: 1,526
North Carolina
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Quote:
I run Dynomax Ultraflows under the floor with a Magnaflow straight-thru muffler by the gas tank in my E-body, and I don't consider it too quiet, but of course that is a subjective matter. If you look for a recent post by Y07_A66 you will see some posts from me with acoustic sound levels comparing the Ultraflows by themselves versus two mufflers on both sides. The sound plots came from a smartphone app. Adding the second muffler on each side did make a substantial improvement.
Where are you in NC? I am in the Raleigh area.
Apex, NC here!
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Re: Need a Quieter Muffler - Please Help
[Re: davenc]
#1614650
05/02/14 09:01 AM
05/02/14 09:01 AM
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Joined: Jan 2003
Posts: 5,443
Indiana
YO7_A66
master
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master
Joined: Jan 2003
Posts: 5,443
Indiana
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This is how member DAVENC mounted his second muffler in the above reference. If is a Magnaflow 7x14 piece. I will be using this idea when I change my exhaust system this Summer.
1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)
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