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#2298641 - 05/03/17 11:05 PM Muffler drone, Please recommend for ones that dont!
4mulaS Offline
super stock

Registered: 01/18/06
Posts: 798
Loc: Alberta
Well, my Road Runner which I recently re-acquired certainly has a drone loud enough to annoy my wife and it does bother me somewhat too.

Im pretty sure they are stainless flomasters right now, and I will confirm this tomorrow,

So I am looking for recommends on descent sounding mufflers with no drone.

It's currently a fresh 383, somewhat Lopey comp cam, with 2 1/2 inch exhaust to the bumper.

Please help so my wife will actually want to cruise with me


Edited by 4mulaS (05/03/17 11:49 PM)
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#2298650 - 05/03/17 11:24 PM Re: Muffler drone, Please recommend for ones that dont! [Re: 4mulaS]
71birdJ68 Offline
master

Registered: 02/09/12
Posts: 3350
Loc: Morristown Tn.
Get a nice factory type muffler from Accrete Exhaust. I remember when my RR had the factory mufflers, and it was quite until you stepped on it, and it didn't drone.


Edited by 71birdJ68 (05/03/17 11:25 PM)

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#2298658 - 05/03/17 11:37 PM Re: Muffler drone, Please recommend for ones that dont! [Re: 4mulaS]
NANKET Offline
master

Registered: 12/13/03
Posts: 3640
Loc: northwest USA
Accurate mufflers are nice sounding just like he says above. Prett quiet inside the car, mild rumble at the bumper at idle.

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#2298684 - 05/04/17 12:35 AM Re: Muffler drone, Please recommend for ones that dont! [Re: 4mulaS]
4mulaS Offline
super stock

Registered: 01/18/06
Posts: 798
Loc: Alberta
The stock aluminized ones or their magna (I think that's what it's called) hi po version? Pertaining to accurate stuff?


Edited by 4mulaS (05/04/17 09:54 AM)
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#2298688 - 05/04/17 12:39 AM Re: Muffler drone, Please recommend for ones that dont! [Re: NANKET]
RapidRobert Online   content
Circle Track

Registered: 11/20/03
Posts: 32526
Loc: Lincoln Nebraska
Keep what you have and add a pair of "cherry bomb" brand glasspacks alongside the rear leaf springs. O'reillys has em for cheap. the louvers are punched outward & the end nipples do not neck down where they are welded to the main case both of which are beneficial for good flow & they do work.
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#2298720 - 05/04/17 03:38 AM Re: Muffler drone, Please recommend for ones that dont! [Re: 4mulaS]
451Mopar Offline
master

Registered: 05/19/08
Posts: 4792
Loc: Aurora, Colorado
I put Walker quiet flow SS mufflers on the convertible.

Walker 22154 Quiet-Flow Stainless Steel Muffler, but it really was too long to fit well (29").

The Walker #21498 quiet flow SS (fits a 2004-2006 Chrysler Pacifica) show s to be 2-1/2" in/out, and just $64 from summit racing, just have to cut off the welded on muffler hangers. These are smaller 13" long case mufflers 20" tip to tip. Says they are a turbo style muffler.

Looks like the outlet tube may be angle cut for the exhaust exit? It could be cut straight and swedged to connect to the tial pipes?

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#2298723 - 05/04/17 04:31 AM Re: Muffler drone, Please recommend for ones that dont! [Re: 451Mopar]
sthemi Offline
master

Registered: 06/07/04
Posts: 3257
Loc: Chicago Burbs
Dynomax Super turbo mufflers, nice sound around town, totally quiet above 50 MPH.. No drone at any speed.

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#2298733 - 05/04/17 07:03 AM Re: Muffler drone, Please recommend for ones that dont! [Re: 4mulaS]
BSB67 Offline
master

Registered: 02/19/05
Posts: 3332
Loc: Prospect, PA
Originally Posted By 4mulaS
Well, my Road Runner which I recently re-acquired certainly has a drone loud enough to annoy my wife and it does bother me somewhat too.

Im pretty sure they are stainless flomasters right now, and I will confirm this tomorrow,

So I am looking for recommends on descent sounding mufflers with no drone.

It's currently a fresh 383, somewhat Lopey comp cam, with 2 1/2 inch exhaust to the bumper.

Please help so my wife will actually want to cruise with me


Headers or exhaust manifolds?
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#2298761 - 05/04/17 08:48 AM Re: Muffler drone, Please recommend for ones that dont! [Re: 4mulaS]
therocks Offline
I Live Here

Registered: 01/20/03
Posts: 18721
Loc: Niles , Ohio
I run Summits stainless on my 440.They have a nice mellow sound pretty much straight thru but when crusing they are nice.Put them on at least 12 years ago and they still look pretty and shiny.That and no seams and were like 60 bucks each.Rocky
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#2298764 - 05/04/17 08:52 AM Re: Muffler drone, Please recommend for ones that dont! [Re: RapidRobert]
DaveRS23 Offline
master

Registered: 01/20/03
Posts: 4359
Loc: Benton, IL.
Originally Posted By RapidRobert
Keep what you have and add a pair of "cherry bomb" brand glasspacks alongside the rear leaf springs. O'reillys has em for cheap. the louvers are punched outward & the end nipples do not neck down where they are welded to the main case both of which are beneficial for good flow & they do work.


iagree

Put any cheap bullet glass packs in the tail pipes to deal with the drone.
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#2298765 - 05/04/17 08:56 AM Re: Muffler drone, Please recommend for ones that dont! [Re: 4mulaS]
L.R Helbling Offline
enthusiast

Registered: 12/29/16
Posts: 380
Loc: Ottawa, Ontario
I've got a 383 Roadrunner with 2-1/2 inch exhaust with OE manifolds and mild lump cam. The exhaust system that I've been using now for about 10 years is Flowtech. Aluminized steel which is all weldable. Very happy with performance. No drone and no blowouts after 10 years.

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#2298767 - 05/04/17 08:57 AM Re: Muffler drone, Please recommend for ones that dont! [Re: 4mulaS]
L.R Helbling Offline
enthusiast

Registered: 12/29/16
Posts: 380
Loc: Ottawa, Ontario
Oooops. Mufflers are Terminators.

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#2298804 - 05/04/17 09:50 AM Re: Muffler drone, Please recommend for ones that dont! [Re: BSB67]
4mulaS Offline
super stock

Registered: 01/18/06
Posts: 798
Loc: Alberta
Originally Posted By BSB67


Headers or exhaust manifolds?


Manifolds
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#2298806 - 05/04/17 09:52 AM Re: Muffler drone, Please recommend for ones that dont! [Re: L.R Helbling]
4mulaS Offline
super stock

Registered: 01/18/06
Posts: 798
Loc: Alberta
Originally Posted By L.R Helbling
Oooops. Mufflers are Terminators.


Who makes a terminator?

To the other two who recommended adding a cherry bomb (essentially a resonator) how will this prevent drone in the existing muffler?
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#2298843 - 05/04/17 10:54 AM Re: Muffler drone, Please recommend for ones that dont! [Re: 4mulaS]
RapidRobert Online   content
Circle Track

Registered: 11/20/03
Posts: 32526
Loc: Lincoln Nebraska
Quote:
To the other two who recommended adding a cherry bomb (essentially a resonator) how will this prevent drone in the existing muffler?
Just trust us, it WILL work (& it is cheap/easy to cut your pipes & add em in).
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#2298872 - 05/04/17 11:47 AM Re: Muffler drone, Please recommend for ones that dont! [Re: 4mulaS]
ZIPPY Offline
I Live Here

Registered: 01/20/03
Posts: 14853
Loc: S.E. Michigan
Any of the dynomax super turbo mufflers that have a 20" long case will
do what you want.

https://www.summitracing.com/parts/wlk-17748
https://www.summitracing.com/parts/wlk-17749
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#2298880 - 05/04/17 12:12 PM Re: Muffler drone, Please recommend for ones that dont! [Re: 4mulaS]
L.R Helbling Offline
enthusiast

Registered: 12/29/16
Posts: 380
Loc: Ottawa, Ontario
Originally Posted By 4mulaS
Originally Posted By L.R Helbling
Oooops. Mufflers are Terminators.


Who makes a terminator?

To the other two who recommended adding a cherry bomb (essentially a resonator) how will this prevent drone in the existing muffler?


Terminator mufflers are made by Flowtech Inc. Do a Google search to see where the closest dealer is to your location.

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#2298903 - 05/04/17 12:40 PM Re: Muffler drone, Please recommend for ones that dont! [Re: 4mulaS]
feets Offline
Senior Management

Registered: 01/20/03
Posts: 26742
Loc: Irving, TX
Originally Posted By 4mulaS
Originally Posted By L.R Helbling
Oooops. Mufflers are Terminators.


Who makes a terminator?

To the other two who recommended adding a cherry bomb (essentially a resonator) how will this prevent drone in the existing muffler?


The exhaust pulses going through the pipes create an unpleasant resonance. That resonance is the drone you hear.

Adding resonators modifies the resonation and reduces the effect.

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#2298931 - 05/04/17 01:27 PM Re: Muffler drone, Please recommend for ones that dont! [Re: feets]
4mulaS Offline
super stock

Registered: 01/18/06
Posts: 798
Loc: Alberta
Originally Posted By feets
Originally Posted By 4mulaS


To the other two who recommended adding a cherry bomb (essentially a resonator) how will this prevent drone in the existing muffler?


The exhaust pulses going through the pipes create an unpleasant resonance. That resonance is the drone you hear.

Adding resonators modifies the resonation and reduces the effect.


Is this achieved by increasing back pressure? I never knew that it was the resonance in the pipe that caused the drone, always thought it was the muffler?. I'm just the kind of guy who really likes to know what's going on before I spend cash.. (Read cheap! Lol)

As and UPDATE TO ALL: they are currently a Dynomax muffler 20" long body and about 24 1/2 to 25" long from tip to tip of the inlet & outlet. The inlet and outlet size mic'd to be close to 2.5". Do they use ID or OD for determining what size inlet and outlet are? From their web the best i can say is they are the 17513 model.

It is also a welded muffler. Does mean it's stainless?

I'm not adverse to adding a resonator, but I really don't want to butcher the exhaust further if this does not cure it..

All this input is great! Please continue!



Edited by 4mulaS (05/04/17 01:38 PM)
Edit Reason: add content
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#2298984 - 05/04/17 02:32 PM Re: Muffler drone, Please recommend for ones that dont! [Re: 4mulaS]
R/T1968R/T Offline
mopar

Registered: 10/02/07
Posts: 458
Loc: New York
KEEP THE MUFFLERS, GET A NEW WIFE!! blah


Edited by R/T1968R/T (05/04/17 02:33 PM)

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