For me the noise is in the wheel wells and the hatch in the back, sounds like the hatch is closed all the way, so Im wondering if just a better rubber seal thingy would help that some and some type of spray on for the wheel wells. But the 10in sub I now have kinda blocks all the noise.

Tire brand/design may have to do a lot with it. When I first bought my Z, the tires used to produce a droning-like sound (kinda like a low howling). When I got new tires, I went ahead and bought Dunlops. The "howling" ended. Also, the ride improved like 50% (i.e. a less jarring ride with the Dunlops, versus the Bridgetown Potenzas).

I have asked several people about the tire issue and most have stated that the noise that is the most common is the road noise. Some have suggested more of a sound barrier would be the best bet however I have as of yet been unable to get the specs. It would be nice if we had some pics showing what really works and what doesn't.

Glad to hear you like our products.
We are gettin gready to add a new package to our website specifically for 350/370z customers.
9 sq feet of Luxury Liner is not really enough to do much damage, but it will help in the specific area it is used.
Our package is going to be something like:

- 60 sq feet of Damplifier
- 36 sq feet of Luxury Liner Pro

This would make a very good impact on unwanted road, engine and exhaust noise and would add about 60 lbs or so.

Always remember, there are 2 tupes of noise to focus on in any car.
1. structure borne noise - reduced with a vibration damper
2. airborne noisel. reduced with a noise barrier

A combination of both products will reduce both types of noise.

Another thing you can do that helps a lot is to use a vibration coating in the wheel wells. This is different from a rubberized undercoating (they do pretty m uch nothing for noise). There are a few companies that make good coatings:

Quiet Car
Stealth Kote
Noise Killer

We also make on called Spectrum
These are acrylic coatings that dry to a very har, yet elastomeric finish. The absorb the vibrations and reduce the noise.
Applying a 2 mm thick coating to the metal wheel wells and quarter panelos is a great way to kill the road noise.
The closer you kill the noise to the source, the less noise will make it to your ears.

Hope that helps!

ANT

engine noise wanted, exhaust noise wanted, road noise not wanted so what would be best for this? The rear wheel wells need something and the hatch area is more of an air noise in my case only a little noise from underneath.

In order to tartget specific type of noise you need to treat the area closest to the noise.

Road noise is a bit more difficult than the rest, since there are 4 tires, placed on all 4 corners of the vehicle.

I would start with 2 gallons of a good noise coating in the wheel wells and quart panels on the underside of the car
Treat the sheet metal that surrounds the tires as well as inside the quarter panels if you can access them.

Next, go for a vibration mat on top of the wheel wells in the hatch (inside the car)and under the hood. Under the hood might be difficult. Some cars only have a small amount of sheet metal exposed from the top of the wheel wells. Just do your best.

Last, use a noise barrier inside the car on top of the vibration damper surrounding the wheel wells and quarter panels.
You may have to do a bit of the trunk/hatch floor with the damper and the barrier becuase of the way the noise travels through the sheet metal.

If you used our product you would go with something like

Damplifier Pro or SPL Tiles (as the vibration mat)
Spectrum (as your acoustical undercoating)
Luxury Liner Pro (as your noise barrier)

There are lots of good product out there, and I am obviously biased, being the owner of Second Skin so do your research and see what works for you. Our product can be expensive if you go with the better ones we offer, but you get what you pay for.
We also have less expensive options for people looking to save some money as well. Again, look around. Whether you use Seocnd Skin or not, there are deals to be found if you do your homework.

Hope that helps!

ANT

lmao ya tell her to STFU or :gtfo2: :roflpuke2:

After living with the (expected) roid noise for about a month-and-a-half now, I'd say the only objectionable noise comes from the rear wheel wells. All other noises are symphonic. :driving:

Road noise
 

I have found that most of the unwanted road noise is from the rear. I just finished putting on Takeda CAI and Invidia Q300 exhaust. While I had the car up I noticed that the under the rear where the spare sits is just plain aluminum with out any undercoat like the rest of the vehicle. Need to take a look at that more closely. I am going to purchase some sound deadening material , do not know which one yet and start in the rear hatch area and also under the rear of the car with some spray material. I will try to borrow a noise meter which measures the decbels and see it I can make a determination as to where the most noise is coming from.

Good news is that when I get on the throttle the only thing I hear is the CAI and the sound of the exhaust. Bad news is when I try to be easy on the ( which is almost never) gas I hear the road noise.

2009 MagBlack/Black 6s Takeda CAI, Invidia Q300 Polished Stainless ehaust

All this dampening is well and good but what are you guys going to do in the spring, summer and fall, drive with the windows closed????

No me...The noise is not that big of a deal...

Where I live, we have grooved freeways. The road noise is so bad that I can't hear the sound system. Other than that, I love the car. Currently in the process of installing Dynamat. Will advise upon completion as to how much road noise took a dixie...

Remember, if you install dynamat and nothing else, the road noise will only be reduce by a small degree.
Products like Dynamat Extreme, Hushamat, Damplifier PRo etc, are vibration dampers. They are designed to reduce structure borne noise.
Exhaust noise, engine noise, and road noise is comprised of structure borne noise and airborne noise. To reduce airborne noise, you need to use a barrier. If you are set on Dynamat product, go with their DynaLiner. this is a very solid performing barrier that will get applied on top of the dynamat extreme.

Remember, if you only use one product, you only attack one of the noise problems, and you ignor the other half of the equasion.

ANT

Large amount of road noise in this car. That said... the bluetooth system in this car really does work quite well. With all my mods, I def have to roll up the windows when I want to use the bluetooth but have no problems when I do. (I just don't shift above 4k when on the phone :icon17:)

Am I the only one who is backwards and enjoys the road noise?

I seriously like it. I'm not quite sure why. It never really gets on my nerves at all, even when I'm trying to talk to someone next to me or listen to music.

Maybe it has a lot to do with what I came from, lol.

It doesn't bother me one bit.