Hi all,

After spending much time driving the 991 and realizing how much noisier the 997 really is, I am exploring the option of having DynaMat installed in my car.

I know changing out tires from the Michelin PS2's to PSS's really help...but, the tires have only like a 1000 miles on them now. It would be a shame not to wear them out...

So, the thought of having Del Rey Audio ( a sponsor here ) installing Dynamat has seriously crossed my mind.

I know it adds weight, but I don't care as I will never track my car. I cannot think of any downsides. Only a quieter car with less vibration.

Thoughts, opinions and comments greatly appreciated..

Thanks,

Steve

PS: I am sure I will upgrade the sound system at the same time they have the car apart...

 

114 views and no one has an opinion or comment?

Anyone, anyone, Bueller???

 

Do it.....

I DynaMat all the doors in my STi and it really helps quiet the road noise down a lot (since the car has very little insulation to begin with)....however, the road noise in the 997 didn't bother me as much but if you are going to do it then you should DynaMat the floor as well.

Report back and let us know how much improvement this mod bring...perhaps you can install a dB measuring apps on your smartphone and do a before and after measurment....

 

The before and after is a great idea! I'll break out my RadioShack sound meter and do just that.

Thank you for the words of encouragement.

Happy New Years!

Steve

 

I did his in a cab when installing a new stereo. Helped with ambient sound somewhat (although cab is still loud). Seemed to help more with sound of stereo than sound deadening. Added a lot of weight which I didn't like. I compensated by going to a lightweight lithium ion battery.

 

Worth a shot. Tried it in another sports car with floor and doors and was disappointed. Tires made a much bigger impovement. Is dynamat still the best on the market to get rid of noise?

 

The question Id be asking is:
what are the sound deadening changes between 997.1 and 997.2,
the latter is dramatically quieter, and if could find out what they did we could reproduce it.?

 

Want a quieter ride? Sell your Porsche and buy a lexus....kinda comes with the territory....or, turn up your stereo....I'm being sarcastic I know but I assumed most of us enjoy ALL the sounds coming from our rides....and some of us do crazy things like make them louder than stock...sorry...I don't have any good answers you were expecting.

 

I had dampening sheets applied to the doors, made a big difference in reducing vibrations from the woofers - would definitely recommend that.

I'm not sure it made a big difference when it comes to road noise from the tires, which is what I'd like to reduce. Let us know if you discover anything.

 

I did some limited dynamatting to my old BMW Z3 coupe, as the rear hatch area had some creaks and would amplify road rumble. It helped. The car didn't creak and felt/sounded more solid over bumps and when closing the hatch.

A nice thing to remember is that you can apply small patches of DM to parts you think are thin or noisy, and to the center of a metal panel to damp it. You don't need to apply expensive and heavy mat to whole areas to benefit. When I first got my 997 I was surprised that it was so noisy considering its' price. Until then I had always somewhat expected an expensive car = a quiet car.

 

I 1/2 agree. For the most part, I like all the sounds coming from the car. Sure it's a bit louder, but it's a sports car. A quiet sports car...seems to kill a bit of the fun, right?


The one pet peeve I do have is those pesky rattles from the loose bits of my 997. My old ES300 was quiet as heck. A very boring drive, but it's sole purpose was to get to work and back.

 

Dynamat will help for sure.
Also under each front seat (at least in my 05) there's no Dynamat or carpet.
Dynamat will deaden sound, carpet will absorb sound.
Do you have all leather or Alcantara?
Carpeted or rubber floor mats?
Soft surfaces absorb more sound.
It seems like the regular 991 is more a GT type car so they probably put a little more effort in the noise dampening. I would bet the GT3 is quite a bit louder.

 

I had the back seat removed and Dynamat installed when I bought the car. This helped the tire noise from the back. I am sure that removing the front seats and doing the front would further help as this is where most of the tire noise seems to come from now.

I also recently drove a 991 and I did enjoy less road noise but when I looked at the price to trade up, the noise did not bother me as much!

 

does anyone have access to a Porsche mechanic that knows the additions from 997.1 to 997.2 for sound deadening, perhaps that will help us all out to know where to place this stuff?