:rofl2: Did you ask him if he had that same problem whenever he has a passenger in his vehicle too? Not saying the added weight wouldn't cause a slight performance decrease, but "totally different", somehow I doubt that. In my RSX I had the entire thing sound deadened with two different types of material, one for road noise and another for sound quality, and didn't feel any noticeable difference in the way it handled. Granted, it was hardly a sports car, but still, I doubt added 40-50 lbs is going to be that big of a difference in acceleration. (In my completely uneducated opinion, of course :))

Um we used over 4 boxes and we have not even gotten to the floor until today. Each box is about 50-80 pounds worth of dynamat. You start putting 50-80 pound boxes into a sports car it is going to handle differently.

A sports car would handle differently with an additional 200lbs, but an already pretty heavy SUV? I doubt that.

I also don't see a need to use THAT much Dynamat in the 370.

No matter what the car is I think additional weight will effect it.

I'm just saying that under most circumstances I think the effect will be minimal. Of course if you did add 200lbs throughout the Z, I think it would have an impact, but even then I don't think it would be too noticeable unless you are tracking the car. That said, the Z doesn't need 200lb's of sound deadener.

The damplifier pro is similar to damplifier except it's thicker and heavier which would provide additional sound deadening. In my old age (48) I would have preferred it to be just a bit quieter. Now I posted the damplifier pro comment prior to the trip I just took today from Salt Lake City to Las Vegas. During today's trip I noticed that the noise level was just about right and I would have to say I think I hit a great balance with the normal damplifier materials.

Bigaudio...nice install pics. I especially lilke your suggestion of using a big spoon to flatten out the materials. I purchased a wallpaper seam roller and found that pressing the materials down with my big thumbs worked will, but I would think the spoon would be perfect.

Sorry to pull this out from the dead, just took the Z on a road trip from Austin to Houston and there were certain roads where the noise levels were completely unbearable! I thought my hybrid was noisy because of the thin panels but the Z is VERY noisy on poor roads.

Good roads, it is very quiet, but the poor paven ones, the decibels are probably in the lower 90s+

So...I noticed that the rear of the car is particularly noisy, especially when raining. What other panels can I apply this to, to get rid of the road noise?

All of them, see my full install album.

after getting driven around in my pop's lexus for a week, i get back in my 370Z and lol'ed.

such a raw kinda car i luv the noise. :D

lol, I think you didn't mean road noise :p

Anyways, dynamat the best option or are there others out there? cheaper/better/lighter?

well my RE11's aren't THAT noisy so some road noise is fine in a sport car.

check with ms.pint. she use to sell GTMatt (i think it was called) and they were like a cheap replica of dynamat.
for me, dynamat only. why? not sure, thats wat ive always used.. lol

There are far better and cheaper options than Dynamat. The only reason people use Dynamat is marketing or blind brand loyalty. I used Raamat. Keep in mind, the Dynamat type product is only half of what you need. You also need to apply a thin layer of closed-cell foam over the dynamat to get it to really work. It's cheap and really makes a difference.

Okay, i'll start looking at the different options. Will keep you fellas posted!

I just got some new Continental DWs to replace the OEM Potenza's - supposedly they are quieter but I know the Z isn't known for its quietness :P

I love the current noise levels but when I am poor roads (could be often in houston) the noise is NOT bearable for long periods unless I used ear-plugs :p

Is anyone running the superlite?

Any difference in noise reduction?

Do you mean this?
Amazon.com: Dynamat 10612 18" x 32" Self-Adhesive Sound Deadener with SuperLite Tri-Pack, (Set of 3): Automotive


I am trying to find alternatives to dynamat as it does look like it will cost quite a bit.

I am interested in this "peel and seal" but then there is this video here about some guy using "Useal" from home depot:



Anyone seen this stuff? I'll have to compare it when I see it in person.

EDIT: need to stay away from any asphalt based deadeners like "Peel and Seal" as they will smell and/or other unwanted effects.