Fender Coating to reduce noise
 

Ok, so I finally got tired of listening to all the rocks and pebbles echoing through my wheelwells. I used this stuff called Blue Magic rubber coating.
3 cans about $7 a piece. I sprayed the inside of the wheelwells with 2 coats and removed the plastic fender panels and sprayed them with 2 coats on both sides. I'm getting ready to install the panels and take her for a test drive, I'll post more on the results.

Let us know how it sounds once you take her for a spin. I asked about this a while back too.

http://www.the370z.com/nissan-370z-g...eel-wells.html

Panel Removal
 

Question, how much trouble was it to remove the panel? Can you give us a write up here on the forum on the process you used?

Thanks,

Was super easy, there are only 3 plastic panel clips holding it on, pulled the first 2 out by hand, the other one was a little tight so just used a flathead screwdriver to lift up the center portion of the clip and then it slipped out.

So, how is the end result? How does it sound???

I'm a little disappointed, it made very little difference. :mad: It's helping, but still needs some more treatment. The next step is to use the sound mat on the inside of the fender wells -inside the car and possibly some more coats of the rubber spray. I'll keep you all posted as I make progress and as to what makes the biggest difference.

Sorry to hear. I was hoping for a simple solution. Keep us posted as you progress through the alternatives. Thanks for being the pioneer.

You'll have more success with the sound matting - personally I wouldn't use any more rubber spray mate - spend the money on a nice treat for yourself instead (a CD maybe?).

Mass wins
 

I thought this might be the case with the spray on stuff. Is higher frequency noise (not the tire rolling drone) less pronounced? The sound mat will more than likely damp the structure better and reduce the noise.

Thanks for the info!

My MazdaSpeed6 had a material that resembled the carpet used on speaker boxes in the fender wells. When I first noticed I thought it wouldn't last, but it did. I've been wondering if something like that would be a good solution on the Z.

You will need to get some thickness to the material for it work. Line-X charges approximately $150 for this to be accomplished as they need to pep and take the wheels off. However, you will want a material that remains flexible so that if it ever does dislodge in a large piece it does not wreak havoc inside your fender well; products like Rhino have been reported to come of in large sheets. Dupli-Color Truck Bed Coating is another thought for those who want to use a truck bed lining material, but I would apply it via the spray gun and air compressor (watch their video). Second Skin Spectrum can also be used as an undercoating. I have not got around to coating our Z yet, but it is will done.

The issue is that the inside of the rear fender wells are like a drum; you need simply take your fingers and you can literally tap out a tune on the wells. There is a thin factory undercoating, but it is hard in nature, and adds to the noise. The ultimate will probably be a sandwich solution which will mean removing the rear interior pieces; no so sure I am willing to go to that extent. In a way, I am surprised that Nissan did not use their acoustic engineers to alleviate this issue, or to better address it; 2010 model?

Too bad on the spray, that would have been nice and easy. Post up any further developments though! http://www.camaro5.com/forums/images.../happy0180.gif

you guys are funny g owners are removing the matting in their wheel whells to reduce weight. lol

It's a matter of the Z being a daily driver versus a track car.

^^^^ nice go with the pic.

Does the sound really make you suffer that much? I think that's a little silly. Should be the least of your worries.

They don't like the sound, they are trying to fix it. What's the big deal? Maybe it wouldn't bother you, but it obviously bothers someone else *shrug*

Yeah, my Mini Cooper S has the same carpet like material in the fenderwells, I thought it was kind of cheap at firlst, but it does a good job, can't here any rocks hitting inside at all. Maybe some outdoor carpet at Home Depot will do the trick :rofl2:

Actually it doesn't bother me that much, but what bothers me more is that I've had to explain to several people what that tinking, clicking sound is coming from the back. I've had at least 3 passengers comment on the sound. Most of the times its not that bad, but on certain streets, streets that I never even knew there was loose gravel, because I never heard it on my other 2 cars, is very pronounced on the 370z.
There is one particular street about 1/4 mile driving up to my work that it is really noticable, I've driven down this street literally thousands of times in my G35, Mini Cooper S & Armada and never knew there was any kind of loose gravel on the road until I traveled down it in the 370Z. Sounds like i'm being pelted by a sandstorm.
I know where it is coming from, there is one parking lot that needs to be re-paved, the cars and trucks that are leaving from there are just tracking it out onto the street.

On a good note, I went into work this morning and the rubber treatment that I did make it less noticeable, I'm going to say that it's about a 25% reduction in sound, but still not like any of the other cars that I drive, so just a bit more work to get it there. :tiphat:

Definitely interested in hearing the forum's solutions. When i get my car, i hope replacing the head unit and all the speakers will have my music bumping so loud and clear that i wont hear the gravel being kicked around my wheel wells...

Hey has anyone tried laying a sound deadener mat on the inside of the car. I would think that would cut down the road noise considerably. I will be doing that some time this week when I can get through the 2 feet of snow to my garage lol...il keep you guys posted.

I had my entire rear dynomatted and it helped a "little". You can still hear quite a bit of pebble action.

Just strip out the hatch area and use some dynamat on the wheel wells.

Hear the Noise in this Video
 

You can hear the noise we are talking about in this video:

[YOUTUBEHQ]O40HNiWW2RQ[/YOUTUBEHQ]

Back-up Camera
 

Gang,

When you check out the video above, also check out the Back-up Camera that I don't believe the US gets..................:mad:

wow I didn't realize it would be that noticeable but it is. That's a cool video. The back-up camera is a cool idea for this car.

The inner rear wheel well already has a fairly thick soft rubberised coating. The plastic panel that is removable is bare hard plastic and in my opinion the culprit when it comes to the tink tink sound of rocks being pitched up against it. A real thick coat of the spray stuff on the outside of that plastic panel will help for that specific noise.
The road noise from the drone of the tires on certain pavement is more pronounced because of the steel drum effect of the rear hatch area.
In my opinion the only thing that is going to quiet that down is a triple layering of the B-Quiet sound deadning material covering every square inch of bare metal on the inside behind the seats.
Just pull out all the stuff back there and start laying down the sticky rubber. I'm thinking 100 sq ft will put enough sound capturing material back there to really do the job.

but how much will that weigh?

woudlnt any weight in the back balance out the car even better though?

Bump: best new product?

I used some of this stuff in my walls when I did some in wall speakers for my home theater, but it's for automotive use. It's made by Mr. Gasket, and I bought it from Titan Motorsports. If you don't see it on the site call and ask, I know they had a lot when I bought a case:

http://titanmailorder.com/Ebay/11-13...0Deadening.JPG

It worked out really good.

Didn't they just close this thread?? :stirthepot:

why would they close it??

Not something I would do, but I'm sure lots of people in here are interested in what he is doing. Doesn't hurt to know either.

I wonder if MiniCobra saw this and what his thoughts are on the product.

G Fo12ce, how much of a sound reduction would you estimate this product is good for, and how much weight was added to the Z?

:rolleyes: I was going to post this on that thread to help it get back on track and saw it was locked lol.

LOL I was just trying to lighten things up from a previous thread about the same subject that got a 'lil testy.

At any rate I think you have to either apply something very thick to the inside of the well or put insulation inside the car. A spray on coating would likely be pretty limited in it's effectiveness.

I'm surprised Minicobra even tried this as there have been numerous posts that say this technique is a FAIL.
Hope springs eternal though....

Anyway, the real reason is the sticky tires. Put some Grandma all seasons on there and problem solved!

My RX-8 has this too and I wish Nissan would do something similar for the Z.