Anyone dynamat their trunk?

**agautohaus** · 11-15-2016 12:00 PM

I mostly have my rear seats down due to doge, and since installing the downpipes it seems like there's way too much noise.

Anyone dynamat their trunk before? I've never done it, this would be my first time. I'm presuming i just remove as much as I can and then stick the sheets everywhere underneath the spare and shit?

How much of a difference does it really make?

**ThunderDent** · 11-15-2016 12:14 PM

Not tried it on the Q, but have it for the Resto project on my Dad's '70 Nova.
It will quiet noise there. But I imagine there is already noise reducers in our cars.

**sszyma** · 11-15-2016 12:20 PM

Yes, I did the entire trunk with raamat a layer of 1/4" CCF on top. After that I said F&^# it and removed every interior panel (including door and headliner) and did the same thing. Just doing the hatch area makes a big difference. For the doors i did the exterior (behind the door card) and interior skin and the inside of the door card.

**Mops@Nemesis** · 11-15-2016 12:42 PM

Lol'ed at the title for some reason

Yes, if done pretty much uniform, it can help a lot.

**DocTJ** · 11-15-2016 01:37 PM

Definitely interested to see how this goes, would like to have reduced Road noise too.

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**agautohaus** · 11-15-2016 01:54 PM

Well I'm busy the next two weeks then I intend to order and install some dynamat ASAP so I can decide whether or not to keep the downpipes (really wanna keep them but the drone is absurd - had 4 people in the car this weekend though and it sounded great!! no drone at all. so thinking i just need some more deadening)

Originally Posted by sszyma

Yes, I did the entire trunk with raamat a layer of 1/4" CCF on top. After that I said F&^# it and removed every interior panel (including door and headliner) and did the same thing. Just doing the hatch area makes a big difference. For the doors i did the exterior (behind the door card) and interior skin and the inside of the door card.

Sweet! If you don't mind me asking do you have any photos? Just wondering exactly how balls out I have go to to get the drone coming through the hatch area to come down a bit.

Basically, how much do I need to install to make a difference (or rather how many panels do i need to take out of the trunk?)

TIA!

**drivenagain** · 11-15-2016 02:49 PM

you could just sing to yourself, then you wont hear a thing

**agautohaus** · 11-15-2016 06:01 PM

Originally Posted by drivenagain

you could just sing to yourself, then you wont hear a thing

oh haha we haven't met yet. All i do in the car is sing at the top of my lungs

**DocTJ** · 11-15-2016 08:14 PM

heres this guy in case the dynamat is considered overpriced:

http://www.audizine.com/forum/showth...ight=drone+fix

**agautohaus** · 11-15-2016 08:53 PM

Originally Posted by DocTJ

heres this guy in case the dynamat is considered overpriced:

http://www.audizine.com/forum/showth...ight=drone+fix

hmmm might have to attempt this tomorrow

**DocTJ** · 11-16-2016 03:39 PM

I'm going give this a shot in the morning

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**agautohaus** · 11-17-2016 05:17 AM

Originally Posted by DocTJ

I'm going give this a shot in the morning

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Nice!! Was gonna try yesterday but didn't get to Lowes. Maybe today. LMK how it goes!!!

Take pics please haha.

**DocTJ** · 11-17-2016 07:54 AM

Got called into work today, likely not gonna be able to do it today. Maybe tomorrow morning.

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**agautohaus** · 11-17-2016 07:55 AM

Originally Posted by DocTJ

Got called into work today, likely not gonna be able to do it today. Maybe tomorrow morning.

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Well I may beat you then

haha

**agautohaus** · 11-17-2016 10:29 AM

Originally Posted by DocTJ

I'm going give this a shot in the morning

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Just swung by lowe's and he said this stuff won't isolate any noise. I noticed the packaging doesn't say noise on it which prompted me to just say f it and order dynamat. Gonna wait to hear your results if you do go for it, though!!

The lowe's by me just didn't have any noise insulation

**sszyma** · 11-17-2016 10:35 AM

Dynamat, Raamat, Fatmat or equivalents add mass to a area which changes the resonant frequency. You then layer over it with CCF (this mitigates some high frequency) or MLV (the only way to go). The combination of the products will make a big difference if installed properly. I am partial to Raamat BXT2 since the price and quality are very very good. Just stay away from ashpalt based mating.

**agautohaus** · 11-17-2016 10:54 AM

Originally Posted by sszyma

Dynamat, Raamat, Fatmat or equivalents add mass to a area which changes the resonant frequency. You then layer over it with CCF (this mitigates some high frequency) or MLV (the only way to go). The combination of the products will make a big difference if installed properly. I am partial to Raamat BXT2 since the price and quality are very very good. Just stay away from ashpalt based mating.

Damnit I didn't understand any of that. I guess I'll order Raamat BXT2 then

**DocTJ** · 11-17-2016 01:27 PM

http://www.raamaudio.com/1-19-sheets...-ft-per-sheet/

That stuff ?

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**sszyma** · 11-17-2016 02:01 PM

Thats the stuff!

**agautohaus** · 11-17-2016 04:25 PM

Originally Posted by sszyma

Thats the stuff!

How many square feet do you need for one trunk area? Haha

**aFOURstance** · 11-17-2016 04:27 PM

Raam audio is where it's at, best bang for the buck

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**DocTJ** · 11-17-2016 09:54 PM

Originally Posted by agautohaus

How many square feet do you need for one trunk area? Haha

same question

**DocTJ** · 11-18-2016 12:00 PM

And I did the back of the seats too

Maybe it's in my head , but seems quieter . Now it seems like most of the noise is coming between my front and back doors.

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**sszyma** · 11-18-2016 12:05 PM

I am curious if you will notice a difference with that. Keep us posted. As I stated the butyl mat is stuck to the sheetmetal and changes the resonant frequency of the panel.

**DocTJ** · 11-18-2016 06:47 PM

About a decibel improvement but that could be within margin of error.
Wind 13 mph
Tested going 70mph, normal road (not great road ) , oem exhaust , s-flo filter , wheels are 20in, 275 wide conti dws06, 034 mounts installed , oem suspension.
Got an avg of about 90.5-90.6 decibels using an app called SoundMeter ( two runs attached ). Iphone 7plus microphone.
A different app called sound level measured At 83 db.

One decibel might not be much, however consider the road noise difference between 70 miles an hour and 80 miles an hour, to me there's a big difference, according to the sound app that's about 1.5-2 dB right there.

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**agautohaus** · 11-18-2016 11:47 PM

I'm wondering how much work it's gonna be to remove everything to get down to the sheet metal lol. Yikes

**DocTJ** · 11-19-2016 08:34 AM

Originally Posted by agautohaus

I'm wondering how much work it's gonna be to remove everything to get down to the sheet metal lol. Yikes

20 minutes to do what i did lol
took away the spare and layered it underneath
and the panels were easy

the hardest part was lifting that heavy spare so early in the morning without coffee lol

**agautohaus** · 11-19-2016 08:37 AM

Originally Posted by DocTJ

20 minutes to do what i did lol
took away the spare and layered it underneath
and the panels were easy

the hardest part was lifting that heavy spare so early in the morning without coffee lol

Hahaha nice. Yeah I gotta order some stuff and get to it. But so many other projects in the way haha