Does Adding Clamps to Exhaust Pipes Reduce Muffler Droning?

[33IMP]

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

They work great... if you can find room under the car.

 

[George Jets]

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?

Yes !!!

 

[Woody500]

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

Helmholtz Resonators, an already covered subject here. Used on late model intakes, too.
But they take up a lot more room than a plain resonator, although that drawing make them look smaller. They require correct volume to work, IIRC. That J pipe looks easy, if you have enough room, but more radiated heat to floorboards.

 

[gdonovan]

Helmholtz Resonators, an already covered subject here. Used on late model intakes, too.
But they take up a lot more room than a plain resonator, although that drawing make them look smaller. They require correct volume to work, IIRC. That J pipe looks easy, if you have enough room, but more radiated heat to floorboards.

Which it is why it is mentioned as "an aside"

 

[70SwingerGuy]

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

Keep me posted, Ive been on the fence with this one

 

[Woody500]

Which it is why it is mentioned as "an aside"

Your rementioning 'an aside: is an actual aside. Your mentioning it the first time is adding new info to the conversation.

 

[gdonovan]

Your rementioning 'an aside: is an actual aside. Your mentioning it the first time is adding new info to the conversation.

Consider the fact I have never seen it once mentioned, I don't live here.

 

[Lord Sparky]

I bought some Aero resonators and my shop added them right after the engine. The car sounds great when idling and sounds like my Subaru when driving (except for the engine noise). Wife is happy, so I am happy. Night and day difference. No more brain-numbing droning.

Aero Exhaust Resonator - tr225 TR Series - 2.25" Inside Diameter Necks

 

[RustyRatRod]

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!

First I've ever heard of it. I don't see how it could, since drone comes from the resonance inside the exhaust.

 

[Map63Vette]

First I've ever heard of it. I don't see how it could, since drone comes from the resonance inside the exhaust.

I agree the symptoms and causes are not solved by heavy band clamps, but I do think there is a reason people would use the clamps. My parents have a new Durango and one of the things I noticed on the exhaust appeared to just be a large chunk of metal. I believe they are using it as a mass damper to cancel out vibration in the system. I could see vibration in the exhaust system potentially causing some amount of noise, but I'm thinking it's more likely done to save parts mechanically (like potentially shaking the substrate of a cat too much and breaking the ceramic).

 

[MOPAROFFICIAL]

That's what magnaflows do best, drone. I recommend you buy some Dynomax Ultra flow mufflers. They don't drone.

 

[toolmanmike]

Do you have tailpipes? That matters.

Tail pipes matter!

 

[RustyRatRod]

I agree the symptoms and causes are not solved by heavy band clamps, but I do think there is a reason people would use the clamps. My parents have a new Durango and one of the things I noticed on the exhaust appeared to just be a large chunk of metal. I believe they are using it as a mass damper to cancel out vibration in the system. I could see vibration in the exhaust system potentially causing some amount of noise, but I'm thinking it's more likely done to save parts mechanically (like potentially shaking the substrate of a cat too much and breaking the ceramic).

It could be similar to putting your hand over a bell to dampen it after it rings. But what the heck do I know? LOL

 

[RustyRatRod]

Tail pipes matter!

LOL Kitty has this on a tee shirt. Naturally.

 

[CRUZE 418]

Dynomax Ultra, still drone. No mufflers alone really get away with it. I have Walker Quiet flows on two cars, one is a stock 318, the other is a built 418, they both drone. Been busy with other things to install reasonators to see if I will be able to listen to music. One person's noise is another person's music.

 

[CFD244]

Keep me posted, Ive been on the fence with this one

Follow up...They didn't solve my drone issue.