Sound Deadening Project

[atlcivic]

Big shout out to op and Johnloov for this thread. I am sound deadening my type r after experiencing some very bad highway roads on a CA to Vegas trip and this info is very helpful. Just finished trunk, backseat and rear wheel wells. Doors are next! I come from owning a few amgs prior to this and miss that vault feeling. Although the type r is an amazing car... I think Honda could've done a bit more to combat road noise while maintaining a lightweight chassis. But its still a Honda so I get it. So far worth it after some back stretches, Cheers.

I’m going to look into doing this at some point also. Has what you done so far made a noticeable difference? And what products did you use?

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[Jhatmaker]

I’m going to look into doing this at some point also. Has what you done so far made a noticeable difference? And what products did you use?

I am a bit of an audiophile so I personally notice a difference. It definitely has not gotten rid of road noise altogether but I have felt an enhancement in speaker audio and a quite minimal reduction in nvh for sure. Using kilmat and 157mil closed cell foam. As previously mentioned it all adds up so I think after I finish doors, and maybe floor if i can't help myself, I expect a noticeable difference then.

 

[johnloov]

I am a bit of an audiophile so I personally notice a difference. It definitely has not gotten rid of road noise altogether but I have felt an enhancement in speaker audio and a quite minimal reduction in nvh for sure. Using kilmat and 157mil closed cell foam. As previously mentioned it all adds up so I think after I finish doors, and maybe floor if i can't help myself, I expect a noticeable difference then.

Floor and totally blanketing rear wheel arches helped a lot

 

[atlcivic]

I was driving and talking to someone on Bluetooth the other day when it started raining. Holy moly, it sounded like I was standing under a thin tin roof with all the pops. As if there was zero material between me and the thin roof of the car. The person on the phone asked if I was getting shot at or if it was hailing haha. Never experienced this before with any other car I’ve owned

 

[jtlctr]

The person on the phone asked if I was getting shot at.

If you’re in America, it’s possible that you were being shot at.

 

[jtlctr]

I recently installed about 1.5 square feet (a little over 1 pound per door) of Second Skin Damplifier Pro on all 4 inner door skins, along with lining each door card with Thinsulate SM400L sound absorber (probably less than 1/2 pound per door). It has made a noticeable difference in audio quality, and cut down road noise a little.
The doors feel so much more solid now when closing!
When I have time, I will be treating the rear hatch area, which will hopefully turn down some more road noise.

 

[36tofu]

@johnloov Just wondering, did you find any guides / resources online regarding how to dissasemble the rear wheel arch covers(inside the trunk) and doors?

If not, do you have any tips / tools that you recommend for that section specifically?

TIA

 

[AZCWTypeR]

YouTube has videos on door panel removal. The one I saw was a window tint guy doing it. Video shows how to pry the switch panels up and the screw location, along with recommendation for initial panel pry locations.

I did it in a warm garage at 80-95 degF. Clips are more likely to break in cold temps. I didn't break any.

Good luck!

 

[AZCWTypeR]

Tools I used:
1. Set of Harbor Freight plastic automotive pry tools.
2. A pair of small flat blade screwdrivers.
3. Harbor Freight automotive push pin removal pliers.
4. #2 Phillips head screwdriver.

I since bought a fancier pry tool set, but didn't need it for the CTR.

I also bought a large push pin assortment to replace any that need replacing. I didn't need them on the CTR, but push pins become brittle on older cars (those exposed to heat).

 

[johnloov]

I believe I had some notes here in the forum. I did order an amazon panel remover tool kit that was extremely helpful with removing panels and the fenders etc.

@johnloov Just wondering, did you find any guides / resources online regarding how to dissasemble the rear wheel arch covers(inside the trunk) and doors?

If not, do you have any tips / tools that you recommend for that section specifically?

TIA

 

[AJR-ATX-FL5]

I just did this same project over the weekend. Have only done the trunk area, rear wheel wells inside the cabin, and rear bench. Butyl rubber 80mill killmat nearly everywhere, roughly 90% coverage. Used the eggshell butyl foam layer on top of that, only for trunk and wheel wells. To finish I covered any remaining gaps and the seams of lower foam layers with the 4mm foam layer. Making about 75% coverage with the 4mm foam.

TLDR
------
Rear Bench seat

• Killmat - 85% coverage
• 4mm foam - 100%

Trunk / Wheel arches

• Killmat - 90%
• Butyl + Eggshell foam layer 90%
• 4mm foam - 75%

Incredible results already, and I have not done the doors yet. Super excited to experience what that will be like.

My question to you John-
How did you manage fitment for the plastic cover that goes over the hatch latch?
Also, were you able to maintain fitment for your folding trunk floor to lay within the groves of the trunk?

If you look at my photos, the wheel arch panels are pushed towards the inside, so it is messing with fitment. I believe I used the exact materials you used, aside from the initial butyl layer. I have thought of cutting out some material where the floor level shifts for the trunk floor insert, to let everything rest closer to stock.

Thanks

https://www.amazon.com/dp/B0751CBXBT KILMAT 80 mil
https://www.amazon.com/dp/B0CCRF9MGW TroyStudio 3 in 1 Car Sound Deadener
https://www.amazon.com/dp/B0BWD1M9Y5 Sound Deadening Mat 157mil(4 mm)

 

[Chrismullin1]

Would some sound deadening help reduce drone from a dual resonator delete? Stock exhaust is too quiet for me and I love the current sound from the outside so want to keep it. Its my rear passengers that sometimes complain!

 

[36tofu]

Would some sound deadening help reduce drone from a dual resonator delete? Stock exhaust is too quiet for me and I love the current sound from the outside so want to keep it. Its my rear passengers that sometimes complain!

Absolutely. I have a front resonator delete (the small one), and after installing insulation only in the trunk /rear wheel wells it became almost silent in the cabin(in terms of exhaust noise/drone)

So with the dual res delete and deadening I imagine it would be perfect in the cabin

 

[johnloov]

My question to you John-
How did you manage fitment for the plastic cover that goes over the hatch latch?

Amazing progress ! Regarding your question “ My question to you John-
How did you manage fitment for the plastic cover that goes over the hatch latch?”

Can you send me a picture - thanks !

Great work !!!

 

[nttran98]

To thost that have done this, what would you rank the area to do.
1. Wheel Wells and Wheel Well liners
2. Inside trunk area and above rear wheel wells.
3. Door panels (i am currently thinking of only dooing the amazon basic sound deadening panel thing.
4.Floor (most certainly too much for me to handle)
Which one would you recommend to start and whatnot.

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