Cabin noise

Bonzo

THANK YOU!!!! This is what I have been saying about the pebble noise issue from the beginning. If what I've done so far doesn't help me ignore the pebbles a month from now, I'm going to paint them with rubber stuff too. Glad to hear it makes a difference.

Thanks again --- Bonzo

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Finally Able To Order 2012 Model 8/24/2011
Delivered Tuesday November 15, 9:57 am!!!
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RiCharlie

Maybe it they cleaned the streets where you guys live this would not happen!

Bonzo

Actually, they do they do, all the time. Roads are very clean here on Southwest Ohio. It's not like Michigan, where the Mafia controls the road crews and they still have tons of dirt roads.

I just think it's everyone's different perspective on the noises they find irritating. A lot of folks here hate the tire noise. To that I'll use the over used phrase, "it's a sports car, and tire noise is good." I like that it's got a lot of tire noise. Makes me feel like I'm in a beast! This tire noise is "in" everyone's Z, but it only bothers some.

The pebble noise is there too, in each and every Z. Everyone has it. Some have said that while they hear the plinking rocks, it doesn't bother them a bit. Others have said they've never noticed it, which just means it REALLY doesn't bother them (or every car they've ever owned has also been a tin can so they expect it to sound this way). And others like me don't like it. We want a sports car with engine and exhaust and tire noise, but we don't want incessant plinking just over my shoulder.

So it's just all about what bothers the individual in particular.

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Finally Able To Order 2012 Model 8/24/2011
Delivered Tuesday November 15, 9:57 am!!!
2012, Auto, White, Sport, Kick Plates

rebe945

Now. Bonzo, I re-read the thread and found one post who mentioned he had a buddy use a homeowners product on his RX8. Had a problem with smell and melting. He didnt say it was Frost King. Frost King is meant to insulate and dampen vibrations on metalized ductwork that transfers heat to your home's rooms. Wasnt trying to be cheap. After seeing Dynamat , Frost King is thicker, so I chose it instead. Money wasnt a factor. Shyt, Id spend anything to satisfy myself with my car . I will monitor the product and let Evil and others know who may use it. By the way, My wheels and tires are on the way and should have them on late next week. Thats why I did this. The base 18s are said to be quieter than the larger 19s. My tires will be 255/295s Hankooks V12s. Ill report back on the issue of noise after the install.

Mecinoid

I'd second that.... Plus, one of the members said it might help to put some FatMat /DynaMat material on the backsides of the fender well liner. Not sure exactly what that means. However, there is a plastic liner that is inside there that I'm going to have a look at. I think putting a bit of material behind that inner fender liner might help.

'10Anamoly

That plastic liner is where I put Dynamat on mine for the front. It helped a decent bit with noise. Just be careful not to cover up the mounting holes as I accidentally did. I just poked through and all was fine though.

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gy954

MB has a technology that samples the sounds in the cockpit, processes them, and puts out noise cancellation through the audio system that removes road noise, wind, etc. Apparently this technology is smart enough to NOT cancel out normal speech

And you may know that the new BMW M5 produces artificial performance-engine sounds through the audio system to make up for the lame I6 sound it really makes.

RiCharlie

Damn man did you read that story about the cars of the future I wrote where everything is fake? This thing with the BMW fake engine sounds like that nightmare come true!

New Story

rebe945

Just a point. I went to a business that details cars. Installs stereos, everything. They showed a sample of Dynamat to me. It was aluminized on one side, thin with an adhesive gray on the other side. So I went to Lowes and found a product that looked totoally identical but twice as thick. It is made for dampining vibrations and insulating metal ductwork. It was less costly and i cannot imagine what superior material Dynamat uses inside the product that would be substantially different from Frost King. [I]t worked for me and was cheaper.

Evil Sports

Frost King worked for me too and so far no so called smell.

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rebe945

Smell. Theres no smell.

Mecinoid

So far after my install the pebbles aren't bothering me. I went on a nice long easy ride yesterday with the wife and it was very comfortable in auto mode. I do still hear tire roar over the different surfaces but, it doesn't seem to be as bad as it was before and more like what I'd expect out of a sports car. I do have Pilot Super Sports installed and a mild exhaust that covers up some of sounds that were bothering me before. I did notice that the exhaust sounds better inside the car and that there is less droning. Which is a big plus. It's just very mellow rumble tone from the exhaust now. Just the way I like it. ;-) It's a lot like my Firebird now with just a little performance tire roar and rumble from the exhaust. You can still talk over it normally but, when you get on it they're like banshees screaming to get out. Nice balance....

I still can't believe how quiet my Vette is in comparison. I imagine there is a bunch of sound deading material in that Vette.

secondnissan

Mecinoid, do you feel the rubberized undercoating in the wheel wells helped out with the pebble sounds? I have dynamatted the whole hatch and lined the rear plastic fender liners with dynamatt. I still get the pebble sound though, i would say i reduced it by 20%. Road noise overall is down about 50% though. I tapped on the metal part of the wheel wells and even where i dynamtted they still still ring/vibrate like crazy. Almost like there is a cavity between the exterior wheel well and the wheel well in the hatch.

rebe945

I drove for an hour Sunday and I was simply satisfied with what I did. I used a product bought at Lowes called Frost King and lined my hatch area with 2 layers. Removed the spare and added 1/2 inch of carpet insulation over the insulating product. Everywhere I could add I did. I believe its necessary for more than Dynomat or other products. Think about it. If you could see what insulates a sedan that has no issue. I bet its not Dynomat. too costly for auto makers. Probably just some foam or cloth like products along with rear seating materials. So i left out the spare and folded a small bed comforter and now use the hatch area under the coroplast(the plastic just under the carpeting piece) as an unseen storage compartment. Im done. Im happy. Its a sports car.

Bonzo

I'm in with you. Feel the same. And yes, I think there is a cavity as you describe.

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Finally Able To Order 2012 Model 8/24/2011
Delivered Tuesday November 15, 9:57 am!!!
2012, Auto, White, Sport, Kick Plates