I just finished up putting Dynamat Extreme in the hatch floor, wheel wells, back wall of the hatch, forward section of the rear wheel wells behind the seats, and most places in between. I also coated the doors and around the speakers there. Note that, as mentioned, you do NOT need 100% coverage. I used strips of it cut to fit the areas. I kept a soft mallet to test for vibration and solidity of the parts after application. You can clearly hear the tone change even with a small amount of Dynamat Extreme applied to an area. I also put some on the heat shield over the rear muffler area. Since my custom exhaust with no mufflers does not get that area very hot any more, it stopped that rattle from the loud exhaust completely.

The sound change overall with just Dynamat in some key areas was significant and well worth the effort. I spent the whole Saturday doing it (not an easy job) and cleaned up before my wife got home. When she got home, I took her for a ride as an objective opinion (without telling her what I did).

It was not more than five minutes in the car and she flat out asked what changed on the car because it was so much quieter and more relaxing inside. I proceeded to explain..

Cost was $142 (price match at Best Buy to Amazon.com prices for three door kits of Dynamat Extreme). I have two sheets of Luxury Liner Pro being delivered today to cover the hatch floor and rear wheel wells. It will be here today so I can report on the additional refinement. Total weight added so far is 15 lbs on the dot. Another 20lbs for the LLP and that will be more than sufficient for my needs. It is already very nice now inside, but I want the CCF and MLV barrier in the back for future exhaust mods to avoid too much drone getting into the cabin.

In addition, after I finished surrounding the door frame and the speaker bracket itself too with the Dynamat Extreme, it nearly doubled the bass output from the Polk 6-1/2" speakers. Sounds like I have a small sub in the car and was worth every penny. I cant turn the volume up anywhere near as loud now and its crisp and clean sounding. Imaging is fantastic.

Last but not least, I covered the rear air vents (near the wheel wells) with Dynamat too. Since the windows open a bit when you get in and out of the car, they were not doing much for air exchange. That alone killed a lot of tire noise and some exhaust fumes from the back.

More to come soon. My opinion is that adding 35 lbs in return for more of a GT-style refined ride is 100% worth it. The car handles identically to before, but the exhaust and engine purrs are so nice now and the road harshness is down about 50% already, pre Luxury Liner Pro addition.

Just my $0.02

Sorry, but there is no way, no way you got it all done in 1 hour. Either you only did a very small portion of the back, or you didn't do a very good job doing it. Heck, unless you've done it all before and are experienced doing it, it takes 10-15 minutes alone to take out all the panels, foam, and spare tire, and another 10-15 minutes to put it all back in. So according to you it only takes 1/2 hour to put in the sound deadening material? You need to buy yourself a watch that works my friend. ;):rolleyes:

I may have taken a lot of time to do it properly and nicely, but even scottIN took 4 hours and he self proclaimed that he did a sloppy job. This is at least a 4 - 10 hour job depending on how picky you are and how many patience you have.

I don't think he meant an hour literally. Obviously it takes more than an hour but the point is it's not a large investment for what can be (depending on your opinion) a large improvement.

lp

It is def more than an hour if you do it right (thats what she said).

I had fun though, had a couple Terrapin Hopsecutioner beers on hand, my handy work gloves, some jams on the garage radio. Good times :tup:

Ever since I got a house, I fell back in love with getting to know my car's guts and privates. She so fine!

I just don't want anyone to be mislead if they are thinking about doing this. It's a royal pain to do, and it takes a while. It's not a wham bam thank you mam job. I think people here considering this should know reality. I know I would.

I got into a discussion years ago with a guy back on the Pontiac Solstice forum about how long it took to put the top up or down. After pages and pages of thread, the guy swore it only took an average Joe 10 seconds to do with no rushing around. He was delusional. I always thought maybe he was an engineer at GM trying to back his baby while wearing a welding mask. Totally blinded. :icon14:

To me it was not a difficult job, it was an exhausting and time consuming job.

Difficult was wiring some AudioQuest UL listed in wall cables through the door piping and connectors without losing my skin.

:eek::rofl2:

True. I would also add arse, leg, and back stiffening the day of, and arse, leg, and back hurting the next day.

not to troll this thread but i just don't understand what the point in dampening the sound in the z. it's supposed to sound and feel like a raw sports car. dynamat'ing the car takes away from it, and imo you mind as well just get a beemer, benz, g37 that's meant to be like that from the factory

I don't ever expect the 370Z to sound like a mid-engine car, but I also don't want to hear every pebble that I drive over - I'll probably give this a try soon.

I sent you a Pm did you get it?

Nice to hear..what i like is that you can now hear the engine more and it's a LOT more pleasant on long drives..I dont think I have ever read a professional review that did not mention extreme road noise as a major problem..It still sounds like a sports car..not a cement mixer..
Same experience with my wife...
With this many complaints you would think Nissan would do something about it...
Nice to hear of your success..

Thanks for the thread...

I have had a 350Z, so I know road noise, I knew the 370Z would be the same, but I want to get rid of Tire noise, and the sound deadening seems like the thing to do..

Thanks for the tips..I now have another project..

And you want road noise ? My other car is a close ratio Pro touring Z/28.. Leave the radio off, and both windows down....That is crazy fun...WOT is just addicting..

Dynamatting does not make this car sound like a luxury cruiser by a long shot...it make it more civilized..sports car sounding but not blasting in you ear mile after mile
..did you read the pro reviews posted earlier in this thread? They all say the road noise extraordinarily loud..

That being said each to his own...glad you like it the way it is......but i post this just to answer your question.

My take on road noise again
 

After riding Saturday The verdict is a thumbs up. I wasnt paying attention at first since i havnt driven since last weekend, then i realized how nice it was. Just cruising about town with the windows down somewhat. It was perfect for a SPORTS CAR. Now thats the key. If you read reviews on any sports car, 95% will mention road noise as a negative. Thats because its a sports car. What I did was perfect for me. It sounds great . Noise was a non factor. Now I didnt go over those perferated cement highway sections but so what. For normal cruising, it was great. I added 2.5 rolls of a product bought at Lowes called Frost King and 1/2 inch layer of backed carpet insulation and removed the spare and layed down a comforter in the spare area. Made a nice unseen storage area. I will be putting on 19s tires 255/295 ( instead of my base 18s) soon. Im hoping what I did is not cancelled out somewhat with the larger rubber. Cross my fingers. Rich

So now that I have the dynamat and luxury liner pro in, its very nice inside. I added a layer of Dynamat to the inside of the front fender liners and it made quite a difference. The harshness is almost gone from the road noise, everything is deeper and more subdued. I took some buddies for a ride and they both commented how much quieter it was inside. I think we have two converts coming soon. :tup: