Dynamat under rear carpet ?

[All Blue ACR]

As Jon refers to it, the inside rear of the GTS acts like a drum and echos sound. Is it a major job to install Dynamat under the rear carpet and covers and does it make a difference?

 

[Mopar Boy]

I just installed 100 sq ft of it into my restoration project. Although I have not driven in it yet to know, it did remove alot of echo from the metal panels. i went with 80 thou thick material for maximum deadning.

Also if you look on ebay, you will find people that sell this stuff in bulk. i looked for about 6 months and as a last resort tried fleabay, and sure enough....

Robert

 

[GTSnake]

Dynamat or any acoustic mat isn't really necessary. It just adds weight. Although it does dampen and deaden certain frequencies you can easily tune your system to compensate. I know of some champion sound competition vehicles that don't use a shred of the stuff.

 

[B SNAKE 1]

I did my hole car. Made a huge difference with sound, heat & kept it cooler inside when running the a/c. It will add some weight. The benefit was more important to me.

 

[Art 138]

I did my hole car. Made a huge difference with sound, heat & kept it cooler inside when running the a/c. It will add some weight. The benefit was more important to me.

You can always adjust for weight by adjusting the amount of fuel you put in the tank....good job....

 

[Dom426h]

Is it a major job to install Dynamat under the rear carpet?

No, it is a Very simple task. Pull the carpet up; cut, peel, & stick your choice of sound deadening material.

more info to add to the mix:
Sound Deadener Showdown

 

[Vman455]

Great site. After reading all that, I went with Second Skin Damplifier in my car as a vibration damper (80 sq ft), then 36 sq ft of closed cell foam as a decoupler under 32 sq ft of mass loaded vinyl as a noise barrier (last two are applied to horizontal surfaces in the trunk and floor pan, as well as the bulkhead behind the seats). This has made a significant difference in the amount of road and exhaust noise in the car. Total weight added was 65 lbs.

 

[GTSnake]

Great site. After reading all that, I went with Second Skin Damplifier in my car as a vibration damper (80 sq ft), then 36 sq ft of closed cell foam as a decoupler under 32 sq ft of mass loaded vinyl as a noise barrier (last two are applied to horizontal surfaces in the trunk and floor pan, as well as the bulkhead behind the seats). This has made a significant difference in the amount of road and exhaust noise in the car. Total weight added was 65 lbs.

Did you notice any heat reduction?

 

[dave6666]

I did the inside of the door panels and the seating areas up to the rear bulkhead with Damplifier from Second Skin. Added about 20 pounds. I did it while doing my side exhaust conversion which included hi flow cats so it's a little hard to quantify the noise and temp changes, but I will say that with the exhaust conversion I did I'd hate to hear it without the stuff.

65 pounds though? Man, that's a LOT of sound deadening stuff!

 

[2001 GTS]

Mine still seemed loud as hell before and after the dynamat in the trunk

 

[Vman455]

Did you notice any heat reduction?

I haven't driven the car in really warm weather yet, so I don't know yet how effective the heat reduction will be.

I did the inside of the door panels and the seating areas up to the rear bulkhead with Damplifier from Second Skin. Added about 20 pounds. I did it while doing my side exhaust conversion which included hi flow cats so it's a little hard to quantify the noise and temp changes, but I will say that with the exhaust conversion I did I'd hate to hear it without the stuff.

65 pounds though? Man, that's a LOT of sound deadening stuff!

This was mostly the mass-loaded vinyl. The stuff is great for blocking noise, but weighs more than a pound per square foot. Since I don't track the car or drag race, instead using it mainly for cruising and long trips, I wasn't too worried about adding weight.