What did you do to your 996TT today?
05-07-2020 | 11:55 AM
#6301
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Joined: Dec 2011
Posts: 4,010
Likes: 1,516
From: Gig Harbor, WA
When I had my interior out for the carpet swap, I put some Dynamat on the top section of the rear firewall right under the window, two 12x16 sheets on top of each other, with another half sheet on top of those. It made a significant difference in the interior noise of my car. That part of the firewall is like a big drum and adding some deadener to it helps a lot.
It's not the best picture of it, but you can see it up there if you zoom in a bit. You don't need to cover the area, you just need some mass in the center of the "drum." I added a little bit to the top of the plate that the ECU mounts to as well to prevent rattling.
It's not the best picture of it, but you can see it up there if you zoom in a bit. You don't need to cover the area, you just need some mass in the center of the "drum." I added a little bit to the top of the plate that the ECU mounts to as well to prevent rattling.
05-07-2020 | 12:27 PM
#6302
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Joined: Aug 2012
Posts: 1,496
Likes: 116
From: San Diego
Cool. Already noticed this, as well. There are at least a couple mechanical noises I had never noticed before. It makes me feel more in tune with the car.
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Carlo_Carrera (05-07-2020)
05-07-2020 | 12:36 PM
#6303
Rennlist Member
Joined: Aug 2012
Posts: 1,496
Likes: 116
From: San Diego
When I had my interior out for the carpet swap, I put some Dynamat on the top section of the rear firewall right under the window, two 12x16 sheets on top of each other, with another half sheet on top of those. It made a significant difference in the interior noise of my car. That part of the firewall is like a big drum and adding some deadener to it helps a lot.
It's not the best picture of it, but you can see it up there if you zoom in a bit. You don't need to cover the area, you just need some mass in the center of the "drum." I added a little bit to the top of the plate that the ECU mounts to as well to prevent rattling.
It's not the best picture of it, but you can see it up there if you zoom in a bit. You don't need to cover the area, you just need some mass in the center of the "drum." I added a little bit to the top of the plate that the ECU mounts to as well to prevent rattling.
If I were retaining an aftermarket exhaust, I would definitely do this.
05-07-2020 | 01:03 PM
#6304
Burning Brakes
Joined: Nov 2002
Posts: 857
Likes: 40
Same here on re-installing stock exhaust. Especially on a street/daily driver, I prefer induction noise. Then when idling at traffic lights, I can hear the Mezger engine’s characteristic mechanical noises which hark back to previous air-cooled 911 experiences. So I get a dose of OG/nostalgia/analog in a sufficiently modern HVAC and performance package. Probably preaching to the choir in this forum...
05-07-2020 | 01:16 PM
#6305
Burning Brakes
Joined: Nov 2002
Posts: 857
Likes: 40
When I had my interior out for the carpet swap, I put some Dynamat on the top section of the rear firewall right under the window, two 12x16 sheets on top of each other, with another half sheet on top of those. It made a significant difference in the interior noise of my car. That part of the firewall is like a big drum and adding some deadener to it helps a lot.
It's not the best picture of it, but you can see it up there if you zoom in a bit. You don't need to cover the area, you just need some mass in the center of the "drum." I added a little bit to the top of the plate that the ECU mounts to as well to prevent rattling.
It's not the best picture of it, but you can see it up there if you zoom in a bit. You don't need to cover the area, you just need some mass in the center of the "drum." I added a little bit to the top of the plate that the ECU mounts to as well to prevent rattling.
05-07-2020 | 02:03 PM
#6307
Rennlist Member
Joined: Aug 2012
Posts: 1,496
Likes: 116
From: San Diego
Would you consider it worthwhile even with the stock exhaust?
05-07-2020 | 02:15 PM
#6308
RL Community Team
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Joined: Feb 2010
Posts: 11,481
Likes: 2,644
From: Nearby
When I had my interior out for the carpet swap, I put some Dynamat on the top section of the rear firewall right under the window, two 12x16 sheets on top of each other, with another half sheet on top of those. It made a significant difference in the interior noise of my car. That part of the firewall is like a big drum and adding some deadener to it helps a lot.
It's not the best picture of it, but you can see it up there if you zoom in a bit. You don't need to cover the area, you just need some mass in the center of the "drum." I added a little bit to the top of the plate that the ECU mounts to as well to prevent rattling.
It's not the best picture of it, but you can see it up there if you zoom in a bit. You don't need to cover the area, you just need some mass in the center of the "drum." I added a little bit to the top of the plate that the ECU mounts to as well to prevent rattling.
05-07-2020 | 02:30 PM
#6309
Rennlist Member
Joined: Nov 2006
Posts: 1,606
Likes: 306
From: North NJ/NYC
When I had my interior out for the carpet swap, I put some Dynamat on the top section of the rear firewall right under the window, two 12x16 sheets on top of each other, with another half sheet on top of those. It made a significant difference in the interior noise of my car. That part of the firewall is like a big drum and adding some deadener to it helps a lot.
It's not the best picture of it, but you can see it up there if you zoom in a bit. You don't need to cover the area, you just need some mass in the center of the "drum." I added a little bit to the top of the plate that the ECU mounts to as well to prevent rattling.
It's not the best picture of it, but you can see it up there if you zoom in a bit. You don't need to cover the area, you just need some mass in the center of the "drum." I added a little bit to the top of the plate that the ECU mounts to as well to prevent rattling.
05-07-2020 | 02:43 PM
#6310
Burning Brakes
Joined: Nov 2002
Posts: 857
Likes: 40
Yes. As mentioned, the strategically placed insulation mats helped with road noise. Stock exhaust got me away from aftermarket exhaust drone.
Basically, I was able to dial out noises unpleasant to my ears; and can drive my street 6TT all day long unlike my driving experiences (without ear plugs) with race cars and GTx.
Basically, I was able to dial out noises unpleasant to my ears; and can drive my street 6TT all day long unlike my driving experiences (without ear plugs) with race cars and GTx.
05-07-2020 | 02:55 PM
#6311
RL Community Team
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Joined: Feb 2010
Posts: 11,481
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From: Nearby
Yes. As mentioned, the strategically placed insulation mats helped with road noise. Stock exhaust got me away from aftermarket exhaust drone.
Basically, I was able to dial out noises unpleasant to my ears; and can drive my street 6TT all day long unlike my driving experiences (without ear plugs) with race cars and GTx.
Basically, I was able to dial out noises unpleasant to my ears; and can drive my street 6TT all day long unlike my driving experiences (without ear plugs) with race cars and GTx.
05-07-2020 | 03:15 PM
#6313
Burning Brakes
Joined: Nov 2002
Posts: 857
Likes: 40
Not sure. IIRC, I didn’t have to take that panel off to install insulation mats; I simply lifted and propped up the carpet.
Edit: I believe leather panel just pull off. I remember from the time I contemplated rear wiper assembly removal.
05-07-2020 | 03:32 PM
#6314
Rennlist Member
Joined: Dec 2011
Posts: 4,010
Likes: 1,516
From: Gig Harbor, WA
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Carlo_Carrera (05-07-2020)