Does Adding Clamps to Exhaust Pipes Reduce Muffler Droning?

[Lord Sparky]

I recently installed 2 new MagnaFlow mufflers to my 440 1969 Dart. They are loud and drone, especially around 2000 RPM. I've read that you can add heavy-duty band clamps at random points along the exhaust pipes do help reduce droning.

Has anyone done this? Does it work? What kind, how many, and where do you place them?

Thanks!

 

[toolmanmike]

No. Clamps will do noting to reduce drone

 

[MV8]

Replace the mufflers with walkers.

 

[Car Nut]

This is what you want, look at the increase of horsepower you’ll gain.

 

[George Jets]

☆☆☆☆☆

 

[CFD244]

View attachment 1716533506


☆☆☆☆☆

I'm hoping this works on mine. I have a couple ordered.

 

[Frank Mopar]

Do you have tailpipes? That matters.

 

[Icetech]

I ended up putting resonators in my tailpipes, they were like $30 each and helped a ton

 

[A56]

I recently installed 2 new MagnaFlow mufflers to my 440 1969 Dart. They are loud and drone, especially around 2000 RPM. I've read that you can add heavy-duty band clamps at random points along the exhaust pipes do help reduce droning.

Has anyone done this? Does it work? What kind, how many, and where do you place them?

Thanks!

Please post where you read that if you can find it. JC Whitney perhaps?

 

[Woody500]

View attachment 1716533506


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I've got some Magnaflows, and always assumed I'd need to put some resonators on it when I finally put them on. I hadn't thought of putting them there, thought in tailpipes next to leaf springs might be the place. This looks easier. Especially if you've moved springs inboard.
Do they work, George?

 

[4spdragtop]

@VOETOM probably knows

 

[Icetech]

 

[Icetech]

Supposed to work fine before the muffler also like george showed

 

[Woody500]

Any brand and part number for tailpipe resonator installation anyone can recommend?

 

[Icetech]

Any brand and part number for tailpipe resonator installation anyone can recommend?

These are the ones i got.. my pipes are 3" the res is 3.5.. (i think) I honestly wish i had gone like 4.5" but didn't know if i had the room..

https://www.amazon.com/dp/B074V698MS?tag=fabo03-20

 

[toolmanmike]

This is what you want, look at the increase of horsepower you’ll gain.

View attachment 1716533507

@VOETOM probably knows

 

[CFD244]

These are the ones I am going to try in my Demon......Would have liked to go bigger, but clearance is an issue.

Aero Exhaust Resonator - tr251 TR Series - 2.5" Inside Diameter Necks

 

[gdonovan]

I found an H pipe to really make a difference on reducing drone.

As others have pointed out, resonators also can help reduce certain frequencies the main mufflers don't cancel out.

My turbovan has two different brand of pass through mufflers and even though you can see right through them the different packing and perforations make a difference.

 

[gdonovan]

Just as an aside; something I saw in Mustang circles years ago was "dead end" resonator chambers added to exhaust systems to control certain frequencies. I'm not advocating slapping random chambers on your car but it is an option if you want to explore a known solution less traveled.

These are VERY common on late model intake systems if you have worked on anything in the last 20 years most have come across them. It will be a dead end tube or bulb in the intake tract and all it does is cancel out noise.

 

[Duster360LA]

I had a very similar issue and the fix was resonators. I got some AERO Exhaust TR251 resonators and put them in just ahead of the mufflers. Almost no drone at all - I can finally listen to tunes when I am cruising.

 

[CFD244]

These are the ones I am going to try in my Demon......Would have liked to go bigger, but clearance is an issue.

Aero Exhaust Resonator - tr251 TR Series - 2.5" Inside Diameter Necks

 

[CFD244]

Just as an aside; something I saw in Mustang circles years ago was "dead end" resonator chambers added to exhaust systems to control certain frequencies. I'm not advocating slapping random chambers on your car but it is an option if you want to explore a known solution less traveled.

These are VERY common on late model intake systems if you have worked on anything in the last 20 years most have come across them. It will be a dead end tube or bulb in the intake tract and all it does is cancel out noise.

View attachment 1716533562

I believe that is the concept of a Helmholtz resonator.

 

[CFD244]

I had a very similar issue and the fix was resonators. I got some AERO Exhaust TR251 resonators and put them in just ahead of the mufflers. Almost no drone at all - I can finally listen to tunes when I am cruising.

I took your recommendation from a previous post......Hoping for the same outcome!

 

[Icetech]

Also known as a J-Pipe

 

[gdonovan]

Also known as a J-Pipe
View attachment 1716533611

I like that, clearly adjustable. You can tune it till you find the right length.