[selmeralto]

I'll be taking delivery of an M2 Competition in a few weeks. I like a very quiet car, not only to reduce engine and road noise but to make the car quieter for sound system upgrades. I've had experience deadening everything I could in an M235i so I'm familiar with what to do with Dynamat and Luxury Liner Pro on the interior of the car, the side wells and the trunk.

But my understanding is that BMW has removed the sound deadening material from underneath the hood.

Has anyone had experience in returning sound deadening to the hood? I was thinking of adding Dynamat but I'm worried about (1) whether it would make much of a difference and (2) whether the engine compartment is too hot for Dynamat.

I'm not concerned about the added weight of the material. The car will be plenty fast for me.

I see that Dynamat makes something they call a hoodliner. Has anyone had success with that?

Any suggestions would be helpful. Thanks.

[robstahl]

perhaps a liner from a regular 2 series would just plug in?

[NISFAN]

I'm wondering whether the M2 is for you?

They have less sound deadening and fundamental design differences that place performance over NVH (e.g. solid rear subframe).

[selmeralto]

Originally Posted by NISFAN

I'm wondering whether the M2 is for you?

They have less sound deadening and fundamental design differences that place performance over NVH (e.g. solid rear subframe).

I'm sure the car is for me. I'm willing to trade a little weight for a quieter cabin and improved audio. (The HK system is absolutely terrible.)

I don't track the car.

[BigKutta]

Originally Posted by selmeralto

I like a very quiet car, not only to reduce engine and road noise but to make the car quieter for sound system upgrades.

I'm sorry OP, but unless my M2 is defective, I think you are going to be upset with the M2C. It is loud and it is not quiet in the cabin. Even when driving calmly, you will not be able to hear phone calls or enjoy a nice song without cranking them way up. There's just no way around it.

Best way to drive the M2C is to absorb the noise and relish it. Roll the windows down and hear the engine and exhaust do their work. If you are not ready for that every time, you wont be happy

[selmeralto]

Originally Posted by robstahl

perhaps a liner from a regular 2 series would just plug in?

Thanks. I actually thought about that but I think I could do a more effective job using adhesive sound deadening than the original (fiberglass?) pad does. But it's a good thought and I may follow up on it if the consensus is against the adhesive solution.

[NISFAN]

Originally Posted by selmeralto

I'm sure the car is for me. I'm willing to trade a little weight for a quieter cabin and improved audio. (The HK system is absolutely terrible.)

I don't track the car.

It has solid bushed suspension, and metal to metal subframe mounts, stiffer gearbox and diff mounts ....and significantly less sound deadening in general. If you go DCT too it is one of the noisiest cars in the BMW line up by miles. Just seems to me you're picking the wrong car to quiet down.

The number one reason people sell M cars is due to the inherent NVH compared to the standard series cars. Just saying.

[selmeralto]

I really do appreciate the warnings about noise but I am committed to trying the car. Maybe I'll live to regret it. But the main point of the request is to get suggestions for sound deadening the car I (will) have.

So, warnings duly noted, I'm hoping this request doesn't get side-tracked by a discussion of whether I should have bought the car and can focus on what experience people have had in sound deadening.

I'll post my results when I'm done in case there are others who might be similarly curious about the issue.

I might say there is a very interesting YouTube video about someone who did decibel readings before and after Dynamatting a loud 'Vette. It was quite instructive.

[Poochie]

Sound deadening https://f87.bimmerpost.com/forums/sh....php?t=1228618

[selmeralto]

Originally Posted by Poochie

Sound deadening https://f87.bimmerpost.com/forums/sh....php?t=1228618

Excellent, Poochie. Thanks so much.

[marcw]

Originally Posted by selmeralto

I really do appreciate the warnings about noise but I am committed to trying the car. Maybe I'll live to regret it. But the main point of the request is to get suggestions for sound deadening the car I (will) have.

So, warnings duly noted, I'm hoping this request doesn't get side-tracked by a discussion of whether I should have bought the car and can focus on what experience people have had in sound deadening.

I'll post my results when I'm done in case there are others who might be similarly curious about the issue.

I might say there is a very interesting YouTube video about someone who did decibel readings before and after Dynamatting a loud 'Vette. It was quite instructive.

I'm sorry you're saying you don't want to have this thread go sideways, but asking about a quiet M2 is like saying you don't like wind in your hair when buying a convertible. I think you don't understand the appeal of the car. You want quiet buy a Tesla or a 7 series.

[cptobvious]

Originally Posted by marcw

I'm sorry you're saying you don't want to have this thread go sideways, but asking about a quiet M2 is like saying you don't like wind in your hair when buying a convertible. I think you don't understand the appeal of the car. You want quiet buy a Tesla or a 7 series.

Oh my god, I needed a good laugh! Thank you.

But, in all seriousness, dude comes on the forum asking politely for technical information and experiences, and everyone leaps at the opportunity to roast him alive. Jesus H Christ!

But, then again, it did make me laugh out loud. So... let's have some more clever snarky commentary!

[marcw]

Originally Posted by cptobvious

Oh my god, I needed a good laugh! Thank you.

But, in all seriousness, dude comes on the forum asking politely for technical information and experiences, and everyone leaps at the opportunity to roast him alive. Jesus H Christ!

But, then again, it did make me laugh out loud. So... let's have some more clever snarky commentary!

Yeah I'm in a snarky mood. Tough day at the office. I think poochie got him what he needed

[Up4speed]

Originally Posted by marcw

I'm sorry you're saying you don't want to have this thread go sideways, but asking about a quiet M2 is like saying you don't like wind in your hair when buying a convertible. I think you don't understand the appeal of the car. You want quiet buy a Tesla or a 7 series.

I totally understand what you are trying to tell him, and I get that our cars are noisy and it's part of the appeal that I also love. However, give the guy some leeway here. I honestly don't see a problem with his request to quiet the car down. What is wrong with wanting a quiet car, that has a short wheel base, has a sporty firm ride, plenty of power, seating for 4, a small size, that's also playful and fun to toss around? a Tesla or 7 series may be quiet, but it has none of the other stuff I mentioned.
I usually don't like to get in the middle of pissing matches, but man, you guys are a tough crowd regarding people who don't have the same exact feelings about the car.
All that said, I'm with you, and I feel like a big part of the charm is the loud noises that come with it. The only noises that I have zero tolerance for are rattles. That would be a deal killer for me. I want all the noises to be intentional!

[nearwater4me]

I agree with some comments here, everyone is entitled to their own choices.
OP decided to get the M2 for his own reasons.
Nothing wrong with anyone buying a car and wanting to have a quiet cabin to enjoy high-end audio equipment.

That being said, I personally think the cabin is on the quieter side compared to most sporty cars.
The chassis does a brilliant job at insulating noises.
Probably too well that it makes listening to exhaust noise almost impossible without rolling down the windows.

OP,
I think adding the rear cabin sound deadening (aluminum plates, and wheel well insulation), along with the front fender foam would help.
I'd definitely dynamat the cabin and firewall.
It's a solid chassis like I said, so I think you'll be quite pleased with the results.

[selmeralto]

Originally Posted by nearwater4me

I agree with some comments here, everyone is entitled to their own choices.
OP decided to get the M2 for his own reasons.
Nothing wrong with anyone buying a car and wanting to have a quiet cabin to enjoy high-end audio equipment.

That being said, I personally think the cabin is on the quieter side compared to most sporty cars.
The chassis does a brilliant job at insulating noises.
Probably too well that it makes listening to exhaust noise almost impossible without rolling down the windows.

OP,
I think adding the rear cabin sound deadening (aluminum plates, and wheel well insulation), along with the front fender foam would help.
I'd definitely dynamat the cabin and firewall.
It's a solid chassis like I said, so I think you'll be quite pleased with the results.

Thanks, nearwater4me. I appreciate the list. I hadn't thought about front fender foam.

I'm a musician, a long-time audiophile, I don't like noise, and I do like responsive cars. I'm sure I'll be able to find a meeting point for these disparate interests. Poochie's link is invaluable, by the way, in case there are others with similar interests reading this discussion who'd like more information.

[jkoral]

Originally Posted by robstahl

perhaps a liner from a regular 2 series would just plug in?

I've seen that mentioned elsewhere, although I couldn't find anyone who had tried it.

Part #51487221993 is the "Sound insulating engine hood" and it's the same part used on the following vehicles (note F82 M4?):

1' F20   (07/2010 — 02/2015)
1' F20 LCI   (05/2014 — 06/2019)
1' F21   (07/2010 — 02/2015)
1' F21 LCI   (05/2014 — 06/2019)
2' F22   (10/2012 — 06/2017)
2' F22 LCI   (09/2016 — 12/2019)
2' F23   (03/2014 — 06/2017)
2' F23 LCI   (09/2016 — 12/2019)
3' F30   (02/2011 — 01/2016)
3' F30 LCI   (09/2014 — 03/2019)
3' F31   (07/2011 — 07/2015)
3' F31 LCI   (09/2014 — 06/2019)
3' F34 GT   (07/2012 — 06/2016)
3' F34 GT LCI   (09/2015 — 01/2020)
3' F35   (06/2011 — 08/2015)
3' F35 LCI   (01/2015 — 03/2019)
4' F32   (11/2012 — 02/2017)
4' F32 LCI   (05/2016 — 12/2019)
4' F82 M4 LCI   (05/2016 — 12/2019)
4' F33   (03/2013 — 02/2017)
4' F33 LCI   (05/2016 — 12/2019)
4' F36 Gran Coupé   (07/2013 — 03/2017)
4' F36 Gran Coupé LCI   (05/2016 — 12/2019)

Does the M2 hood have the same mounting points on the hood?

F22 hood is 41007373899 and according to realoem same part is used on M2 and M2 LCI. I assume same hood is used in M2C.

OE hood insulation looks a bit over $100. Aftermarket (ebay, amazon) looks around $50.

[jkoral]

Looks like you could even buy the rear interior sound insulation, someone with a 240 removed theirs:

https://f87.bimmerpost.com/forums/sh....php?t=1781173

[BigKutta]

Originally Posted by marcw

I'm sorry you're saying you don't want to have this thread go sideways, but asking about a quiet M2 is like saying you don't like wind in your hair when buying a convertible. I think you don't understand the appeal of the car. You want quiet buy a Tesla or a 7 series.

Originally Posted by cptobvious

Oh my god, I needed a good laugh! Thank you.

But, in all seriousness, dude comes on the forum asking politely for technical information and experiences, and everyone leaps at the opportunity to roast him alive. Jesus H Christ!

But, then again, it did make me laugh out loud. So... let's have some more clever snarky commentary!

I think the point we are all trying to make is that even these changes will not make the M2C a quiet car. It is inherently designed to make you feel alive and run vibrations through your body. No being mean, just honest

Originally Posted by nearwater4me

OP,
I think adding the rear cabin sound deadening (aluminum plates, and wheel well insulation), along with the front fender foam would help.
I'd definitely dynamat the cabin and firewall.
It's a solid chassis like I said, so I think you'll be quite pleased with the results.

I added the front fender gap foam, and the difference was marginal at best, if any. Point is that all these will add very marginal benefits, but not enough as a whole to make the M2 quite. I hope flybigjet chimes in here as he's probably added a lot of this insulation, and can tell you how quiet it really got.

[akkando]

Originally Posted by BigKutta

I think the point we are all trying to make is that even these changes will not make the M2C a quiet car. It is inherently designed to make you feel alive and run vibrations through your body. No being mean, just honest

I added the front fender gap foam, and the difference was marginal at best, if any. Point is that all these will add very marginal benefits, but not enough as a whole to make the M2 quite. I hope flybigjet chimes in here as he's probably added a lot of this insulation, and can tell you how quiet it really got.

Some guy added a bunch of this stuff to quiet down the car and said the results were good. So apparently if you do all the missing stuff from 2 series it makes a difference.

[AlpsRider]

The M235i is a quiet car. You can add the same insulation that it has to an M2 and make it quiet as well. One easy thing that can be done to make long freeway trips more bearable is to use efficient mode to cut down on ASD sound or just code or cut it out all together.
Just because someone wants a quiet car doesn't mean they have to buy a Merc sedan.

[marcw]

Originally Posted by BigKutta

I hope flybigjet chimes in here as he's probably added a lot of this insulation, and can tell you how quiet it really got.

I think GregoryK has added all the sound deadening back in and posted his results here: https://f87.bimmerpost.com/forums/sh...&postcount=161

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!