MoparFins

Techical Discussions => General Tech => Topic started by: Jason Medhurst on April 21, 2008, 08:30:40 PM

Title: Best sounding Muffler for 383
Post by: Jason Medhurst on April 21, 2008, 08:30:40 PM
I am interested in what everyone thinks about the best sounding muffler for my 68 Newport Convertible.  I would like to stay with a single outlet as it has right now.  Its a g code 2bbl 383.
Thanks for any help!
J
Title: Best sounding Muffler for 383
Post by: Matt Aker on April 22, 2008, 10:15:03 AM
It's a matter of taste really.  The two C's I drove through the '90s had a Jeckyl and Hyde thing going on for them.
 
My '66 NYer ran full-bodied quiet Walker mufflers and there was almost no sound while in the driver's seat.  A slight rumble when standing between the pipes at the bumper.  This was Dr. Jeckyl
 
My '68 383 Polara was set-up with 14" Blue Bullets.  At idle and under normal driving it had a noticeable rumble and a nice tone but not obnoxious.  Jump on it though... (http://moparfins.com/forum/smileys/smiley4.gif)(http://moparfins.com/forum/smileys/smiley17.gif)(http://moparfins.com/forum/smileys/smiley2.gif)  Mr. Hyde!  My nieghbors HATED that car when it was tune-up time.  My exhaust guy was a magician!  he asked me what I wanted from the Dodge and made it happen.
 
Moreover:  A good quality glass-pack will let the car talk a little without being rude to the folks next door.  Plus you can still put the top down and have a conversation with the Missus while driving.  It's the best of both worlds, a healthy sounding big-block and a happy wife!
Title: Best sounding Muffler for 383
Post by: Brian on April 22, 2008, 11:31:23 AM
Well I'm bias to the Dynomax super turbo mufflers....I had a 2 1/2 inch dual set-up on my 70 sport fury with a 360 and will be getting the same set-up on my 68 T/C wagon.
 
I liked the muffler because they had a nice rumble while idling and cruising, not too loud though, but when you stomped on it they made a fair amount of noise.
Title: Best sounding Muffler for 383
Post by: Leaburn Patey on April 22, 2008, 01:29:28 PM
Rhino...loud and horny..
Walker...quiet and smooth..
Factory Hemi muffler Nice burble and not too loud.Quiet in the car.
I too am running Dynomax Super Turbo's
Flowmasters and  Magnaflows make a Mopar sound like a Chebbie SBC or a Phord 5.0L
Title: Best sounding Muffler for 383
Post by: Jason Medhurst on April 22, 2008, 06:52:19 PM
I am not sure what you mean by makes it sound like a Chevy small block?  How should it sound differently?
 
Has anyone heard a dual 50 series Flowmaster or 40 series on a 383?
 
What about Magnaflows?
Title: Best sounding Muffler for 383
Post by: Stitcherbob on April 22, 2008, 07:26:02 PM
Walker Dynomax Turbo  mufflers are patterned identical to Mopar's famed Hemi mufflers....that's why they sound perfect!
Every big block Mopar needs to sound like the Charger in "Bullitt" (http://www.moparfins.com/forum/smileys/smiley20.gif)


Title: Best sounding Muffler for 383
Post by: Brian on April 22, 2008, 07:40:27 PM
Quote from: jaystone6
 
Has anyone heard a dual 50 series Flowmaster or 40 series on a 383?
 
 
Flowmaster 40 series are WAY too loud...especially for a convertible...50 series are LOUD...buddy had both these on his 383 cars, and I can't say I liked the sound of either.
 
 
Title: Best sounding Muffler for 383
Post by: R. Dave Carr on April 23, 2008, 07:09:57 AM
After driving everyone else on this board crazy with exhaust questions, I'm having dual exhaust with Dynomax Super Turbos installed on my '66.   Go to Youtube, and enter "chrysler exhaust" in the search area, and listen to different peoples cars.carrman2008-04-23 12:11:06
Title: Best sounding Muffler for 383
Post by: Snotty on April 23, 2008, 10:07:19 AM
I agree with Brian and prefer Turbos.  I have those on my Newport and think it sounds great.  I receive a number of compliments as well.  I had Flowmasters on my New Yorker and liked it for a day.
 
Under excelleration it did sound like a Ford or Chevy.  Listen to a newer mustang with FMs on it; that's what your Chrysler would sound like.
 
I have never liked glasspacs; they "pop" on decelleration and get very heavy under your car because they retain condensation.
 
Of course, all of our comments are based on personal likes and dislikes.  It's really up to what you like.  Go to a show and listen to some cars.  If you find a few that you really like ask them what they're using.
Title: Best sounding Muffler for 383
Post by: Leaburn Patey on April 23, 2008, 03:51:37 PM
440 with TTI 2-1/2" system Dynomax Super Turbo's
Click on various vids for different rang of sounds.
http://s51.photobucket.com/albums/f385/68Cbarge/?mediafilter=videos (http://s51.photobucket.com/albums/f385/68Cbarge/?mediafilter=videos)
Title: Best sounding Muffler for 383
Post by: Johnny D. on April 23, 2008, 05:52:16 PM
my preference has been cherrybombs, but tommorow its gettin a stock 1971 chrysler 300 muffler... from 71.

we'll see how that goes.


Title: Best sounding Muffler for 383
Post by: Jason Medhurst on April 23, 2008, 06:15:47 PM
Ok,
just installed two Dynomax Super Turbos, H pipe, and new exhaust back from the stock manifold down tube.
 
Sounds good when standing next to the car.
 
When driving at buolevard speeds, there is a really loud hum, almost like a straight six with open headers.  Once I gun it, or speed up alot more, it goes away.
 
HELP PLEASE!  It is an awful drone.  Could it be that the two lines are made exactly the same on both sides causing a standing wave inside the car.  This was with my top down too.  Any help is greatly appreciated.  I was going to contact Dynomax for help also.
 
Thanks
jaystone62008-04-23 23:29:52
Title: Best sounding Muffler for 383
Post by: Herman on April 23, 2008, 11:40:45 PM
I also had the Dynomax mufflers under my '65 Convertible. I didn't like the stationairy drone either so I took them out.
Part of the drone-problem is perhaps the fully seperated exhaust pipes. Should you put an H or X-pipe in the system the sound will be toned down most likely.
I still have seperated pipes aswell and will be installing an H-pipe in the near future I think.

My '65 convertible now sports a set of 50series Flowmasters, which I hoped would give a similar sound as the ones under my '62 Wagon, which sound real nice.
But the new Flowmasters make more noise than the Dynomax mufflers, mainly because they are still clean inside. The ones on my wagon are mostlikely full of carbon-deposits which tamedown the noiselevels I guess.



Title: Best sounding Muffler for 383
Post by: Jason Medhurst on April 24, 2008, 05:47:38 AM
I just spoke with Dynomax.
 
They told me the drone or hum is coming from a flow problem at low RPM's.  They said that I should either try using a 2.5" pipe rather than the 2.25" that I used (right!(http://www.moparfins.com/forum/smileys/smiley19.gif)) or move to a higher flowing muffler.  They recommended the Ultra Flow..  They said its louder outside, but I should see less cabin resonance.
 
I am going to ask my exhaust guy what he thinks today.  I might go with the Flowmaster or Magnaflow that I really have never had resonance issues with. 
 
I told them I bought this muffler due to the picture of the 68 300 Convertible on their web site, and asked them what that had installed.  They didn't know!  Strange.
jaystone62008-04-24 10:48:02
Title: Best sounding Muffler for 383
Post by: Snotty on April 24, 2008, 09:51:54 AM
If it's just at certain speeds, don't drive those speeds!!!  (http://www.moparfins.com/forum/smileys/smiley4.gif)
 
I have 2.5" pipes and no crossover and don't have that problem.  There is a rather large harmonic at 40 MPH, so I don't drive 40. 
 
I had 2.5" exhaust with Flomasters and crossover on my '62.  The harmonic was terrible from 30-65!!  After 65 the car was actually quiet.  But it was due to all the other noise that I will not use FMs anymore.
Title: Best sounding Muffler for 383
Post by: Jason Medhurst on April 24, 2008, 01:07:20 PM
Its not just certain speeds, its related more to engine RPM and load.  I would guess between quarter and half throttle it resonates in the cabin at 1200 to 200 RPM (no tach to help me here).
 
Are there any tunable baffles or resonators that can be added?  It seems like if you can cancel out the standing wave that occurs, you can sell someone a muffler that wouldmake anyone happy.  You just sell its sound at WOT, right?
Title: Best sounding Muffler for 383
Post by: Snotty on May 12, 2008, 08:58:12 AM
A friend of mine had Dynaflows installed on his '69 318 Charger.  It sounds great!  I don;t know if he used a crossover or not, sure does sound sweet though! 
Title: Best sounding Muffler for 383
Post by: R. Dave Carr on May 12, 2008, 01:48:40 PM
The Walker Dynomax Super Turbos on my 300 sound awesome!
Title: Best sounding Muffler for 383
Post by: Leaburn Patey on May 12, 2008, 01:58:59 PM
The drone-beleive it or not-depends on how the tailpipes exit the rear.
Too short of a tailpipe(s)will drone.
Straight pipe out? or turn downs?
Extending the tailpipes with some cheapo tips can help.
Make sure they do not extend the TOP edge of the bumper.2-1/2 -3" max.
I find turn downs are quieter. 
Plus installing sound deadening material in the car may help (Dynamat comes to mind.) This may be a bit expensive and also requires you removing the interior to install it.
 
Double check the hangers and muffs.The muffs should be clear from the floor pan.I had seen muffs tight against the floor causing drone--and interior fires...(http://www.moparfins.com/forum/smileys/smiley7.gif)  Hangers should have some isolators in them to allow the exhaust to move with the engine and keep the vibrations/drone down.
CBarge2008-05-12 19:52:11
Title: Best sounding Muffler for 383
Post by: Leaburn Patey on May 12, 2008, 02:48:37 PM
From the factory,the tailpipes ended behind the bumper.
As shown,I left a little bit more pipe with the turndowns past the bumper to help quiet down the drone inside the car.
It works..
Note that they are not sticking out past the top of the bumper.Any longer it would look stupid.
CBarge2008-05-12 19:50:49
Title: Best sounding Muffler for 383
Post by: Steve on May 12, 2008, 03:56:33 PM
That's all fine and fancy.  My bumper doesn't go all the way down to the bottom of the car.  It would look stupid if I extended them.  They originally were extended on there and had him change them.  They are just behind the Valance.
 
(http://www.moparfins.com/forum/attachments/5/Dual_1.gif)
Title: Best sounding Muffler for 383
Post by: Snotty on May 12, 2008, 06:20:56 PM
Mine look like Steve's, but I don't think I have a picture of them.  (http://www.moparfins.com/forum/smileys/smiley19.gif)
Title: Best sounding Muffler for 383
Post by: steve fogel on May 12, 2008, 06:50:11 PM
I have dual Flowmasters on the Belvedere, but it's a 318.......they're pretty tangy on the ears......the Hurst's rusted out pieces of crap exploded on the way home from Snotty's house.....I thought it was WWIII.........
Title: Best sounding Muffler for 383
Post by: Jimmy on May 13, 2008, 02:32:13 AM
  383 in my 66 300, running dynomax ultra-flo mufflers and 2" pipe front to back. When I initially started the car with the mufflers it never had the tailpipes installed, it sounded horrible. After the tailpipes were installed it tamed down considerably but did drone a little. I initially nipped the pipes about 4" before the bumper with intentions of installing cheapy tips and when I finally installed them, extending about 1 1/2"- 2" past the top of the bumper, droning was gone completely.
Title: Best sounding Muffler for 383
Post by: Snotty on May 13, 2008, 10:41:40 AM
Quote from: hurst1
I have dual Flowmasters on the Belvedere, but it's a 318.......they're pretty tangy on the ears......the Hurst's rusted out pieces of crap exploded on the way home from Snotty's house.....I thought it was WWIII.........
 
Yes, but your new ones look and sound nice!
 
(http://www.moparfins.com/forum/smileys/smiley2.gif)
Title: Best sounding Muffler for 383
Post by: Stoga on June 25, 2008, 10:19:37 PM
I'm a fan of original style Imperial mufflers, quiet but large enough to flow well. I used to use them on my old 70 Roadrunner, you could still hear the carburetor coming open just fine!
I've got some wore out glasspacks that came on my 68 Imperial coupe, they get to droning real bad on a long cruise, so I plan to change them when I put that car back on the road.
If you mainly use your vehicle around town, loud pipes aren't such a problem, but they'll literally wear you down on a long cruise over several hours or more.