1M exhaust drone problem

1M Fan · 10-17-2011, 08:19 PM

I think I have the resonation solve and made good progress on lessening the drone. I started by putting more of the Damplifier in the trunk, on the muffler heat shield and under the back seat. I cut two strips 4"X12" and cut that into smaller pieces and put it in multiple places on the heat shield by the muffler. Next I cut two 9"X12" pieces for under the back seat. I cut those two piece once again for a total of four pieces under the seat. The remainder went in the trunk area. I have a total of about 5 sq/ft of Damplifier in the car for a total weight of 1.75 lbs.

Just to make sure I had it fixed. I put two full sheets of Overkill in the trunk. Overkill is a closed cell foam mat. Total installed was 18 sq/ft or 2.35 lbs.

Let me say the car is much quieter, in fact, it is too quiet. I'm going to remove the Overkill tomorrow and see what the effect is. I wish there was another 1M in Memphis so I could see what the Overkill would do by its self.

Edit: See post 130. The Done still comes and goes.

///1M · 10-17-2011, 10:20 PM

Yeah, I think that using all that "Overkill" was probably overkill.

Seriously, if you've solved the drone problem, you will be one of my favorite people. Ever!

1M Fan · 10-17-2011, 10:44 PM

Quote:

Originally Posted by ///1M

Yeah, I think that using all that "Overkill" was probably overkill.

Seriously, if you've solved the drone problem, you will be one of my favorite people. Ever!

It was a bit of Overkill, but I didn't want to say it.

1erMCoupe · 10-18-2011, 03:58 AM

Thx 1M Fan for testing ... That is exactly what i thought when i reported that here last week. The drone can be reduced/eliminated with some noise reduction mat. My parts arrived today.......looking forward to get rid of the drone.

Jante82 · 10-18-2011, 06:25 AM

It should still be possible to manufacture an exhaust that does not drone, without implementing "noice killer" in the trunk.

For my M3 E46 I had a canadian exhaust - Scorza, zero drone and a glorious sound. I hope they will make a product for the 1M. It is really sad/bad that no company still has created a drone free exhaust for the 1M, even though the companies are well known and has a good reputation.

A little clip:

Papethova · 10-18-2011, 11:29 AM

Quote:

Originally Posted by 1M Fan

I wish there was another 1M in Memphis so I could see what the Overkill would do by its self.

Ill be passing through memphis in about 3 weeks with the M (I hope)

1M Fan · 10-18-2011, 05:41 PM

I drove to work today without the Overkill and the drone is back. It is considerably less and lower pitched with the other sound control. I'll put in one sheet of the overkill and see how that works.

mPlasticDesign · 10-18-2011, 05:47 PM

Obioban's car is sick. I have been drooling over it, on M3forum.net for years!

rapter · 10-18-2011, 07:00 PM

Quote:

Originally Posted by 1M Fan

It was a bit of Overkill, but I didn't want to say it.

Where do you get all this material? I would like to start adding this stuff to the car

1SerieStud · 10-18-2011, 07:15 PM

Just took delivery of mine today. This car doesn't drone...it's called an exhaust note.

1M Fan · 10-18-2011, 08:26 PM

Quote:

Originally Posted by rapter

Where do you get all this material? I would like to start adding this stuff to the car

www.secondskinaudio.com

sparoz · 10-19-2011, 01:27 AM

Quote:

Originally Posted by 1SerieStud

Just took delivery of mine today. This car doesn't drone...it's called an exhaust note.

Mine drones... may be I am driving too slow... no drones when I get to 80mph.

as7920 · 10-19-2011, 02:09 AM

Mine still drones, as much today (4,500 miles) as it did the day I got it.

Mind you I rather like it! So much so, I find that I don't listen to HK or DAB much!

eeghie · 10-19-2011, 03:17 AM

Quote:

Originally Posted by as7920

Mind you I rather like it! So much so, I find that I don't listen to HK or DAB much!

+1

Excuse me OP, so sorry that you happen to not like it. Hope this thread yields a resolution.

Yet, let me say: Drone Shmone!

Both windows are opened more frequently because the car sounds that good, especially near highway constructions, bridges and tunnels. With temperatures declining, the AC is making over hours.

EmmDrei · 10-19-2011, 03:45 AM

Imho the largest part of the drone is caused by the last, main silencer. I have a new, street legal exhaust under my 1M, mainly because I didn't like the way the stock exhaust looks. Ok, call me picky. But btt... no more drone. Well, hardly any. My exhaust is a tad louder, but in car, you have a lot less noise and especially no drone. Bad thing is...

...I liked my drone.

evolution80 · 10-19-2011, 04:03 AM

Quote:

Originally Posted by EmmDrei

Imho the largest part of the drone is caused by the last, main silencer. I have a new, street legal exhaust under my 1M, mainly because I didn't like the way the stock exhaust looks. Ok, call me picky. But btt... no more drone. Well, hardly any. My exhaust is a tad louder, but in car, you have a lot less noise and especially no drone. Bad thing is...

...I liked my drone.

+1

like the drone as well - it really is more of an exhaust note imo

drone seems to lessen when you accelerate - so next time i am doing 160kmh on the bundesstraße (highway?) i tell the officer i just wanted to get rid of the drone

Jante82 · 10-19-2011, 04:05 AM

Quote:

Originally Posted by EmmDrei

Imho the largest part of the drone is caused by the last, main silencer. I have a new, street legal exhaust under my 1M, mainly because I didn't like the way the stock exhaust looks. Ok, call me picky. But btt... no more drone. Well, hardly any. My exhaust is a tad louder, but in car, you have a lot less noise and especially no drone. Bad thing is...

...I liked my drone.

Which exhaust did you go for?

EmmDrei · 10-19-2011, 04:09 AM

Quote:

Originally Posted by Jante82

Which exhaust did you go for?

I have the street-legal, stainless steel prototype they (http://www.lightweight-titanauspuffanlagen.de/) made for the 1M. Beautifully made!

No pics or soundfiles yet, but I will.

Jante82 · 10-19-2011, 05:05 AM

Quote:

Originally Posted by EmmDrei

I have the street-legal, stainless steel prototype they (http://www.lightweight-titanauspuffanlagen.de/) made for the 1M. Beautifully made!

No pics or soundfiles yet, but I will.

I didn´t know that they had made a stainless steel exhaust option. Please make a video!

If it is drone free, that might be what I am looking for!

1M Fan · 10-19-2011, 07:29 AM

I put the Overkill back in and drove to work this morning. The drone is back. It seems to come and go. It looks like a new exhaust may be the best solution. At least the resonation within the car is gone.

Robcut1 · 10-19-2011, 11:53 AM

What would replace the rear silencer (if that truly is the problem), without the costly replacement of entire system?

rapter · 10-19-2011, 05:56 PM

Quote:

Originally Posted by 1M Fan

I put the Overkill back in and drove to work this morning. The drone is back. It seems to come and go. It looks like a new exhaust may be the best solution. At least the resonation within the car is gone.

What were to conditions that you posted that there was no drone at all? How could the drone come back after the "overkill" was put in, maybe you were not driving it on load (note: it will only drone on load).

10-17-2011, 08:19 PM	#111
1M Fan SMSgt 11 Rep 239 Posts Drives: AW 1M Coupe Join Date: Dec 2010 Location: USA, TN iTrader: (0) Garage List 1012 F150 [0.00] 1971 Chevrolet Nova [0.00] 2011 1M [0.00]	Resonation Solved and the drone lessened I think I have the resonation solve and made good progress on lessening the drone. I started by putting more of the Damplifier in the trunk, on the muffler heat shield and under the back seat. I cut two strips 4"X12" and cut that into smaller pieces and put it in multiple places on the heat shield by the muffler. Next I cut two 9"X12" pieces for under the back seat. I cut those two piece once again for a total of four pieces under the seat. The remainder went in the trunk area. I have a total of about 5 sq/ft of Damplifier in the car for a total weight of 1.75 lbs. Just to make sure I had it fixed. I put two full sheets of Overkill in the trunk. Overkill is a closed cell foam mat. Total installed was 18 sq/ft or 2.35 lbs. Let me say the car is much quieter, in fact, it is too quiet. I'm going to remove the Overkill tomorrow and see what the effect is. I wish there was another 1M in Memphis so I could see what the Overkill would do by its self. Edit: See post 130. The Done still comes and goes. Attached Images Last edited by 1M Fan; 10-19-2011 at 07:30 AM.. Reason: Updated in Post 130
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10-17-2011, 10:20 PM	#112
///1M Captain 25 Rep 612 Posts Drives: On a good day, AW 1M coupe Join Date: Mar 2011 Location: between Indiana and the alley iTrader: (0)	Yeah, I think that using all that "Overkill" was probably overkill. Seriously, if you've solved the drone problem, you will be one of my favorite people. Ever!
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10-18-2011, 03:58 AM	#114
1erMCoupe Private 8 Rep 66 Posts Drives: BMW 1 M Join Date: Nov 2010 Location: Germany iTrader: (0)	Thx 1M Fan for testing ... That is exactly what i thought when i reported that here last week. The drone can be reduced/eliminated with some noise reduction mat. My parts arrived today.......looking forward to get rid of the drone. __________________ 1er M Coupe delivered // AW, wheels gungray, Performance Seats, KW V3+, Eisenmann exhaust.
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10-18-2011, 06:25 AM	#115
Jante82 New Member 2 Rep 26 Posts Drives: 1M Coupe Join Date: Dec 2010 Location: Stockholm iTrader: (0)	It should still be possible to manufacture an exhaust that does not drone, without implementing "noice killer" in the trunk. For my M3 E46 I had a canadian exhaust - Scorza, zero drone and a glorious sound. I hope they will make a product for the 1M. It is really sad/bad that no company still has created a drone free exhaust for the 1M, even though the companies are well known and has a good reputation. A little clip: Last edited by Jante82; 10-18-2011 at 06:30 AM.. Reason: YouTube link added
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10-18-2011, 05:41 PM	#117
1M Fan SMSgt 11 Rep 239 Posts Drives: AW 1M Coupe Join Date: Dec 2010 Location: USA, TN iTrader: (0) Garage List 1012 F150 [0.00] 1971 Chevrolet Nova [0.00] 2011 1M [0.00]	I drove to work today without the Overkill and the drone is back. It is considerably less and lower pitched with the other sound control. I'll put in one sheet of the overkill and see how that works.
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10-18-2011, 05:47 PM	#118
mPlasticDesign Major General 684 Rep 5,069 Posts Drives: BMW 230i Msport w/LSD Join Date: Nov 2007 Location: Astral Projecting: ∞ 23.516 -122 02.625 0242.101 ĕv'rē-hwâr' iTrader: (16) Garage List 2009 Porsche 911 997.2 [10.00] 2019 Hyundai N (Sold) [10.00] 2013 BMW M3 (Sold) [10.00] 2011 1M Coupe (Sold) [8.78] 2008 E90 M3 (Sold) [8.60] 2007 Z4 Mcpe (Sold) [9.50] 2005 BMW M3 (Sold) [10.00]	Obioban's car is sick. I have been drooling over it, on M3forum.net for years! __________________
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10-18-2011, 07:15 PM	#120
1SerieStud Brigadier General 183 Rep 3,939 Posts Drives: '11 VO 1M (498 of 740) Join Date: Jul 2010 Location: Jacksonville, FL iTrader: (11)	Just took delivery of mine today. This car doesn't drone...it's called an exhaust note.
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10-19-2011, 02:09 AM	#123
as7920 Colonel 597 Rep 2,375 Posts Drives: 2023 SG/FR M4 xDrive Competiti Join Date: Jul 2006 Location: UK iTrader: (0)	Mine still drones, as much today (4,500 miles) as it did the day I got it. Mind you I rather like it! So much so, I find that I don't listen to HK or DAB much!
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10-19-2011, 03:45 AM	#125
EmmDrei Lieutenant 26 Rep 401 Posts Drives: 2011 Saphire Black 1M Coupé Join Date: Oct 2009 Location: 300km to the Nordschleife iTrader: (0)	Imho the largest part of the drone is caused by the last, main silencer. I have a new, street legal exhaust under my 1M, mainly because I didn't like the way the stock exhaust looks. Ok, call me picky. But btt... no more drone. Well, hardly any. My exhaust is a tad louder, but in car, you have a lot less noise and especially no drone. Bad thing is... ...I liked my drone. __________________ The best piece of road - worldwide.
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10-19-2011, 07:29 AM	#130
1M Fan SMSgt 11 Rep 239 Posts Drives: AW 1M Coupe Join Date: Dec 2010 Location: USA, TN iTrader: (0) Garage List 1012 F150 [0.00] 1971 Chevrolet Nova [0.00] 2011 1M [0.00]	I put the Overkill back in and drove to work this morning. The drone is back. It seems to come and go. It looks like a new exhaust may be the best solution. At least the resonation within the car is gone.
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10-19-2011, 11:53 AM	#131
Robcut1 Second Lieutenant 112 Rep 267 Posts Drives: 2016 M4GTS Join Date: Oct 2011 Location: Jupiter, Fl iTrader: (1)	What would replace the rear silencer (if that truly is the problem), without the costly replacement of entire system?
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