Sound Damping
 

I was wondering if sound damping works. Has anyone done this to their 370z and does it actually help in reducing the noise in the car. Which company is the best?

A few people have discussed this a little in the audio/video section (to reduce outside noise), as well as the intake/exhaust section (to reduce drone).

To effectively sound dampen the Z, you're apparently going to be adding quite a bit of weight to the vehicle. Depending on your reasoning (reduce speaker rattle, reduce outside noise, reduce drone) there may be some specific things you can do other than all out dynomatting the entire vehicle.

Other people just turn their radio volume up. :happydance:

That'd be me. But, road noise, a bit of a rough ride, droning, all that is part of what makes my johnson rod drip. It's supposed to be a sports car. Or a sporty car. Sometimes, I want to feel it and hear it. And if I'm in a more casual mood, I'll just crank up the thump.

look into a company called second skin. ive used many other brands and theirs has been far superior.

Dynomat Extreme I have 7 sheets in the rear hatch area big differance

Second Skin FTW.

:iagree: Sound Deadening Materials for Noise Reduction from Second Skin

Worked for me on my Vette....40 sq ft kit of Damplifier, $100 at the time.

http://images33.fotki.com/v1120/phot...MG_2159-vi.jpg

It's a personal choice of what you are going to do to your car. Whatever it is, hopefully it doesn't cause any unwanted damages to your vehicle. For sound dampening I have heard miracle stories about dynomat but it's expensive.

I have second skin and it made a big difference. I put in about 20-25 lbs worth of material in the hatch, certainly not a lot of weight for the results.

I laid down Hushmat in the rear cargo area, under the bracing and under the seats right up to the firewall. The whole thing cost me about $400 in material and added about 37.5 lbs. The cost was not high and certainly did not add any noticeable weight to the car.

I posted my results on the audio forum, but the long and short was that it made moderate improvements overall. I still hear my Stillen exhaust loud and clear (which I wanted) and the engine noise is largely still there (but a little more subdued). However, road noise is definitely down. At low speeds, it's virtually gone. At high speeds, the main variable is the tires. Depending on the road surface, I can have a very quiet ride at highway speeds or a very loud one. On asphalt, the car is quiet even at 60-80mph. But unfortunately, in Los Angeles we have a number of grooved freeways and - given the stock tires - they generate a lot of road noise. I am getting close to having to replace my stocks and will be looking for a quieter tire. Once I get those put on I will be very curious to hear the final impact of the tire change/Hushmat combination.

I don't usually care too much about cabin noise (I do realize that it's a sports car), but my Z is also my daily driver. Because I work slightly odd hours, I also have to use the bluetooth a lot with my fiancee. At freeway speeds without any sound dampening, it is virtually impossible to carry on a conversation. Even with the dampening, the tires still make it very difficult on most LA freeways.

Does anyone have a recommendation for a differently grooved tire that might reduce road noise? Did anyone swap out their stock tires for something else and get noticeable improvements to road noise?

Most of the noise in this car comes from the rear wheels up through the back end. A different set of tires might help, I am planning to pick a set that is rated quieter than our standard fits. The Dynomat does work, you can get good results if you put it in the right place....knowing where that place is takes either a computer finite element model and an experienced NVH engineer, experience, or a good guess. Some people Dynomat the entire enterior, and that can weigh 100-200lbs.

I had asked about sound deadening and tires a ways back, and it seems sound deadening works, but I'm not sure where to put it (I like the lean curb weight of this car). I haven't heard anything about changing tires, however.

I did read in an long term update online that Nissan knows the source of the "higher than normal" noise and that it will be "fixed in future update". But I forgot where I read it from (and my internet connectivity sucks right now). I do recall something about sound insulating an "in-cabin duct" or something like that. Maybe it'll be a TSB?

Just ordered some SecondSkin damplifier pro and luxury liner pro. Hopefully I can get it all installed this weekend and post up review/pics. I really have no problems with the actual noise but it's hard to hold conversations with the woman now that I have the F.I. exhaust. And she's not too fond of the noise during long drives. Hopefully this helps.

I switched to the new Michelin Pilot Sport A/S. 40K tread wear rating and it is quieter. They don't pick up and throw rocks around the wheel wells.