Sound deadening

GregoryK · 04-07-2018, 08:19 PM

Decibel-X

bmwv · 04-08-2018, 02:26 AM

Quote:

Originally Posted by GregoryK

So much quieter to my ears. Still a little disappointing 78.1db down from 82db all @ 120kph (70mph)
The car is 67.db at idle.
I'm using a crappy app to measure these by.
Honestly was hoping for 72 db!
Still have to do the doors and front though.
Stand by for updates.

Nice, 4 db is a very big difference.

GregoryK · 04-09-2018, 05:58 AM

I am hoping the front fender gaskets reduce it another 2db

bmwv · 04-09-2018, 01:40 PM

Quote:

Originally Posted by GregoryK

I am hoping the front fender gaskets reduce it another 2db

Just put them it takes 10 min u don't have to take out anything.

mjsaville · 04-09-2018, 02:51 PM

Superb effort, awaiting further insulation images with interest... MJ

GregoryK · 04-09-2018, 02:55 PM

Put them in took 45 minutes and I don't have huge hands!
Tough to get perfect...
They will only quieten down sounds from the engine compartment, Sound still come around the door the same way. Interested to go for a motorway drive. Likey 2 days before I do new readings.

GregoryK · 04-11-2018, 03:15 PM

Wow. I ran the sound meter today at 120kph.
73 to 75 db. It is hard to believe! I did update the app but assume it still works the same!
I guess more noise was coming from the lack of engine gasket than you might think.
The car is still not quiet under hard acceleration but the the 350 kbps audio files sound decent at 90mph now.
I can safely say. MISSION ACCOMPLISHED!

chip_dip19 · 04-11-2018, 04:46 PM

Quote:

Originally Posted by GregoryK

Wow. I ran the sound meter today at 120kph.
73 to 75 th. It is had to believe! I did update the app but assume it still works the same!
I guess more noise was coming from the lack of engine gasket than you might think.
The car is still not quiet under hard acceleration but the the 350 kbps audio files sound decent at 90mph now.
I can safely say. MISSION ACCOMPLISHED!

Good to hear. Just got my door seals in since they took 2 weeks to ship from Germany because of backorder.

voyagergab · 04-11-2018, 05:36 PM

Thanks for doing the research GregoryK

I've ordered up all these parts worth $420 CAD

Door and front wheel noise
Sealing side panel, left: 51487300693
Sealing side panel right: 51487300694

Sound insulation, engine compartment: 51487221993
Clips x 18, 51489119216

SOUND INSULATING WHEEL HOUSING REAR LEFT: 51487334357
SOUND INSULATING WHEEL HOUSING REAR RIGHT: 51487334358

Lateral trim panel rear
Cover for side section, left: 41007294289
Cover for side section, right: 41007294290
Clips 12 x 51489119216

GregoryK · 04-11-2018, 08:34 PM

Don't forget
51487296055

SOUND INSULATION TRUNK LEFT

51471911992

Fixing plug x12

D = 8MM

51487296056

SOUND INSULATION TRUNK RIGHT

voyagergab · 04-11-2018, 09:33 PM

Quote:

Originally Posted by GregoryK

Don't forget
51487296055

SOUND INSULATION TRUNK LEFT

51471911992

Fixing plug x12

D = 8MM

51487296056

SOUND INSULATION TRUNK RIGHT

Ah I missed those. Thought the wheel well parts was what I needed.
Where do those wheel well covers go?

bmwv · 04-11-2018, 11:51 PM

Quote:

Originally Posted by GregoryK

Wow. I ran the sound meter today at 120kph.
73 to 75 th. It is had to believe! I did update the app but assume it still works the same!
I guess more noise was coming from the lack of engine gasket than you might think.
The car is still not quiet under hard acceleration but the the 350 kbps audio files sound decent at 90mph now.
I can safely say. MISSION ACCOMPLISHED!

Great, I am glad it worked so well.
What happen with the door insulation
51487319479
51487319480
did u put these or they were there from the factory?

bmwv · 04-11-2018, 11:56 PM

Quote:

Originally Posted by voyagergab

Ah I missed those. Thought the wheel well parts was what I needed.
Where do those wheel well covers go?

They are on the trunk side of the wheel well.

GregoryK · 04-12-2018, 06:22 AM

Quote:

Originally Posted by bmwv

Great, I am glad it worked so well.
What happen with the door insulation
51487319479
51487319480
did u put these or they were there from the factory?

They were not required as they were already there.

GregoryK · 04-12-2018, 06:25 AM

Quote:

Originally Posted by bmwv

They are on the trunk side of the wheel well.

The wheel wells are in front of and behind the seats. The insulation is in 2 sections. The one you ordered goes behind the panels by the rear seats. The others go in the trunk.

randyt · 04-12-2018, 07:20 AM

Quote:

Originally Posted by GregoryK

Wow. I ran the sound meter today at 120kph.
73 to 75 th. It is had to believe! I did update the app but assume it still works the same!
I guess more noise was coming from the lack of engine gasket than you might think.
The car is still not quiet under hard acceleration but the the 350 kbps audio files sound decent at 90mph now.
I can safely say. MISSION ACCOMPLISHED!

Are you saying that just the addition of the front seals dropped the sound from ~78db to ~73-75db?

GregoryK · 04-12-2018, 08:39 AM

Quote:

Originally Posted by randyt

Are you saying that just the addition of the front seals dropped the sound from ~78db to ~73-75db?

No. I'm not saying that that you would get that drop if you just did the front seals. I got that result after the whole back was done first. I would be hard to gauge how much the front seals alone would reduce the sound levels.
I took my wife for a drive and she said it was like being in a different car.

voyagergab · 04-18-2018, 03:18 PM

Just installed the front door seals. What a pain in the ass that was.

voyagergab · 04-18-2018, 08:30 PM

Quote:

Originally Posted by voyagergab

Just installed the front door seals. What a pain in the ass that was.

Surprisingly just adding these made an appreciable difference with front wheel noise and engine noise.

18EM2 · 04-22-2018, 11:13 AM

Appreciate you sharing your findings. I’m looking for the best way to reduce just the tire noise. It’s seems to be primarily the rear tires you hear? What would be the best bang for the buck/time to lower the tire noise?

Nezil · 04-22-2018, 03:27 PM

Quote:

Originally Posted by 18EM2

Appreciate you sharing your findings. I’m looking for the best way to reduce just the tire noise. It’s seems to be primarily the rear tires you hear? What would be the best bang for the buck/time to lower the tire noise?

I'm wondering this also... Panel in the rear side under the side panel arm rests, or the sound deadening over the wheel arches in the trunk?

voyagergab · 04-22-2018, 03:34 PM

Quote:

Originally Posted by Nezil

Quote:

Originally Posted by 18EM2

Appreciate you sharing your findings. I'm looking for the best way to reduce just the tire noise. It's seems to be primarily the rear tires you hear? What would be the best bang for the buck/time to lower the tire noise?

I'm wondering this also... Panel in the rear side under the side panel arm rests, or the sound deadening over the wheel arches in the trunk?

I've got both sets on order from Germany.
Once they arrive I can try the panels first and report back.

04-07-2018, 08:19 PM	#155
GregoryK Captain 503 Rep 780 Posts Drives: M2 '18 Join Date: Aug 2014 Location: Canada iTrader: (0)	Decibel-X __________________ "I would rather cry in a BMW than smile on a bicycle." Ma Nuo
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04-09-2018, 05:58 AM	#157
GregoryK Captain 503 Rep 780 Posts Drives: M2 '18 Join Date: Aug 2014 Location: Canada iTrader: (0)	I am hoping the front fender gaskets reduce it another 2db __________________ "I would rather cry in a BMW than smile on a bicycle." Ma Nuo
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04-09-2018, 02:51 PM	#159
mjsaville Second Lieutenant 101 Rep 246 Posts Drives: M2 LLB - Arrived 4th Mar 2017 Join Date: Jun 2016 Location: Aberdeen, UK iTrader: (0)	Superb effort, awaiting further insulation images with interest... MJ Last edited by mjsaville; 06-08-2018 at 03:56 PM..
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04-09-2018, 02:55 PM	#160
GregoryK Captain 503 Rep 780 Posts Drives: M2 '18 Join Date: Aug 2014 Location: Canada iTrader: (0)	Put them in took 45 minutes and I don't have huge hands! Tough to get perfect... They will only quieten down sounds from the engine compartment, Sound still come around the door the same way. Interested to go for a motorway drive. Likey 2 days before I do new readings. __________________ "I would rather cry in a BMW than smile on a bicycle." Ma Nuo Last edited by GregoryK; 04-09-2018 at 07:59 PM..
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04-11-2018, 03:15 PM	#161
GregoryK Captain 503 Rep 780 Posts Drives: M2 '18 Join Date: Aug 2014 Location: Canada iTrader: (0)	Wow. I ran the sound meter today at 120kph. 73 to 75 db. It is hard to believe! I did update the app but assume it still works the same! I guess more noise was coming from the lack of engine gasket than you might think. The car is still not quiet under hard acceleration but the the 350 kbps audio files sound decent at 90mph now. I can safely say. MISSION ACCOMPLISHED! Last edited by GregoryK; 04-12-2018 at 03:15 PM..
	Appreciate 4 voyagergab633.00 bmwv107.50 admranger2984.50 MASHCT613.50 Quote

04-11-2018, 05:36 PM	#163
voyagergab Major 633 Rep 1,083 Posts Drives: G82 M4 6MT, G01/F97 X3M Join Date: May 2014 Location: Calgary, AB iTrader: (0)	Thanks for doing the research GregoryK I've ordered up all these parts worth $420 CAD Door and front wheel noise Sealing side panel, left: 51487300693 Sealing side panel right: 51487300694 Sound insulation, engine compartment: 51487221993 Clips x 18, 51489119216 SOUND INSULATING WHEEL HOUSING REAR LEFT: 51487334357 SOUND INSULATING WHEEL HOUSING REAR RIGHT: 51487334358 Lateral trim panel rear Cover for side section, left: 41007294289 Cover for side section, right: 41007294290 Clips 12 x 51489119216
	Appreciate 1 SDR5550.00 Quote

04-11-2018, 08:34 PM	#164
GregoryK Captain 503 Rep 780 Posts Drives: M2 '18 Join Date: Aug 2014 Location: Canada iTrader: (0)	Don't forget 51487296055 SOUND INSULATION TRUNK LEFT 51471911992 Fixing plug x12 D = 8MM 51487296056 SOUND INSULATION TRUNK RIGHT __________________ "I would rather cry in a BMW than smile on a bicycle." Ma Nuo
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04-18-2018, 03:18 PM	#172
voyagergab Major 633 Rep 1,083 Posts Drives: G82 M4 6MT, G01/F97 X3M Join Date: May 2014 Location: Calgary, AB iTrader: (0)	Just installed the front door seals. What a pain in the ass that was.
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04-22-2018, 11:13 AM	#174
18EM2 Public Last Class 97 Rep 244 Posts Drives: 2018 M2 DCT LBB Join Date: Dec 2017 Location: Bay Area iTrader: (0) Garage List 2018 BMW M2 [0.00]	Appreciate you sharing your findings. I’m looking for the best way to reduce just the tire noise. It’s seems to be primarily the rear tires you hear? What would be the best bang for the buck/time to lower the tire noise?
	Appreciate 0 Quote

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