What causes exh drone
Thread Starter
Racer
Joined: Dec 2019
Posts: 310
Likes: 41
From: Chicagoland
What causes exh drone
My base A6 has an E Force and Borla ATAK mufflers. On the hiway at any speed its quiet, no drone at all. In town its quiet.
If I put on headers and X pipe will that cause drone?
And, if I add headers and X pipe how much HP can I expect?
Thank you
If I put on headers and X pipe will that cause drone?
And, if I add headers and X pipe how much HP can I expect?
Thank you
Last edited by Charliemopic; Feb 24, 2020 at 11:28 AM. Reason: Edit ask about adding headers & X
Burning Brakes
Joined: Jun 2003
Posts: 846
Likes: 105
From: Knoxville TN
I personally don't think headers has anything to do with it?
I know my car with headers, non-catted mid pipe and NPP has zero drone with the valves closed, but when the valves are open, the drone is very bad while cruising.
I know my car with headers, non-catted mid pipe and NPP has zero drone with the valves closed, but when the valves are open, the drone is very bad while cruising.
Burning Brakes
Joined: Jul 2002
Posts: 1,136
Likes: 100
From: Nova Scotia
When my 09 M6 was stock I ran the npp open all the time with zero drone. After installing catted headers I got drone, and the car was louder. I got some clamps to hold the npp open a little bit while in the closed position and now run it like that and it's awesome
Burning Brakes
Joined: Jun 2003
Posts: 846
Likes: 105
From: Knoxville TN
I actually preferred the sound of base mufflers with headers to the npp mufflers but they just don't flow as much
Last edited by da6speed; Feb 25, 2020 at 03:47 PM.
Melting Slicks
Joined: Jun 2006
Posts: 2,497
Likes: 261
From: Miami Florida
Drone is a byproduct of insufficient muffler size and or efficiency the C6 corvette has the entire exhaust confined within the car undercarriage as oppose to just been under the body this condition warrants additional resonance particularly adding multidirectional sound waves converging to multiply expanding then amplified inside the cabin this condition is not nearly as harsh outside the cabin.
That’s easily avoided by those who appreciate the original C6 muffler size and keep it regardless The purpose involve I make my own mufflers and are of very high flow and no drone though laud enough to please those who can appreciate quality performance sound.
My mufflers are exact shape and size as original 3. Inch in then split into dual perforated 2.5 inch pass across almost the entire muffler I start going in the top split and curb down then turn again to exit but with a really good straight length of perforated route to muffle sound no need for valves,
That’s easily avoided by those who appreciate the original C6 muffler size and keep it regardless The purpose involve I make my own mufflers and are of very high flow and no drone though laud enough to please those who can appreciate quality performance sound.
My mufflers are exact shape and size as original 3. Inch in then split into dual perforated 2.5 inch pass across almost the entire muffler I start going in the top split and curb down then turn again to exit but with a really good straight length of perforated route to muffle sound no need for valves,
Last edited by xBoostx; Mar 1, 2020 at 12:01 AM.
Le Mans Master
Joined: Dec 2005
Posts: 6,999
Likes: 1,685
From: Southeast TX
Cheap mufflers. You get what you pay for. Corsa's and OEM dual modes don't drone. If you feel the need to reinvent what works and what doesn't, enjoy the drone. Yes, LT headers with no cats makes it worse. Buy something that has been proven to work. Or buy head phones or convince yourself that "it's not really that annoying".
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Melting Slicks
Joined: Jun 2006
Posts: 2,497
Likes: 261
From: Miami Florida
Cheap mufflers. You get what you pay for. Corsa's and OEM dual modes don't drone. If you feel the need to reinvent what works and what doesn't, enjoy the drone. Yes, LT headers with no cats makes it worse. Buy something that has been proven to work. Or buy head phones or convince yourself that "it's not really that annoying".
Last edited by xBoostx; Mar 1, 2020 at 02:45 PM.
Le Mans Master
Joined: Dec 2005
Posts: 6,999
Likes: 1,685
From: Southeast TX
The corsa sport are awesome they use double front and rear wall to control dron and that works real well for them they are also very thick wall and very heavy mines weight with the over axel pipe pass side 28 lbs drivers 26 lbs my entire header back exhaust now weights 28 lbs.
Thread Starter
Racer
Joined: Dec 2019
Posts: 310
Likes: 41
From: Chicagoland
These say Borla ATAK. They appear to be made of thick stainless steel with heavy welds. Each muffler has 2 exit pipes.
They are quiet until boost comes on then they get loud.
The hold heat too.
Last edited by Charliemopic; Mar 8, 2020 at 10:02 PM.