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Cabin noise

Originally Posted by lpsscc 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

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Old 03-16-2012, 12:56 PM   #1 (permalink)
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Originally Posted by lpsscc View Post
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
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.
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Old 03-19-2012, 01:10 PM   #2 (permalink)
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Originally Posted by Bonzo View Post
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.

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.

Wow, you must be fun at parties. I was just trying to help people out guy, no need to get your pretty little pink panties in a wad.

If you actually read my post, you'd see that my install was uber simple and I did the bare minimum. My car didn't have spare tire, foam, tools, etc to deal with. I already took that crap out a long time ago. So for me, it was just a matter of removing the trunk panels and slapping the 12 sq ft of B-quiet down and then laying corrugated foam on top of that. So YES, it took me roughly an hour. Maybe it was an hour and 21.50894 minutes? A couple hours? No idea. Next time I'll keep track down to the millisecond.

The point I was making is that you don't have to go all out and dynamat the whole car to get good results. It can be done on the cheap, and quickly. I apologize again for making you PMS so hard.

Switch to decaf, my friend.


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Old 03-20-2012, 09:31 AM   #3 (permalink)
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Wow, you must be fun at parties. I was just trying to help people out guy, no need to get your pretty little pink panties in a wad.
No panties in a wad here. Sorry you can't handle hearing the truth. You are "one of those" I guess. I'd say you are the one getting your panties in a bunch.

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If you actually read my post, you'd see that my install was uber simple and I did the bare minimum. My car didn't have spare tire, foam, tools, etc to deal with. I already took that crap out a long time ago. So for me, it was just a matter of removing the trunk panels and slapping the 12 sq ft of B-quiet down and then laying corrugated foam on top of that.
Well for you, doing the bare minimum might have been good enough, and that's great for you. Seriously, I wish that were the case for everyone. Others here felt dynamatting the entire back did nothing at all, and it was only after doing the doors that it made a difference. So one thing this thread has proven is that people have different tolerances for different things when it come to this noise issue. If YOU had read all my posts here, you would know that my ONLY noise issue is the pebbles tinking the inside of the fender wells. Your minimalistic approach would have done about 1% to fix my issue, which basically means it would have done totally nothing; a total waste of time.

Quote:
So YES, it took me roughly an hour. Maybe it was an hour and 21.50894 minutes? A couple hours? No idea. Next time I'll keep track down to the millisecond.
And just who do you think is being the total jack arse here???

Quote:
The point I was making is that you don't have to go all out and dynamat the whole car to get good results. It can be done on the cheap, and quickly.
I think a lot of people here aren't normally all that adventurous in regards to removing panels etc. I know every single one of my friends that saw my car were like, are you crazy? You are an exception. Most people have not torn out all the foam and tire for other reasons etc like you. Most people aren't going to rip all that stuff out only to do a quick fix. Most people, after going through the nervousness of all the panel removal, are going to take the time to do the full blown fix, to get all the improvements they can. I'm glad you are happy with your results, and that's awesome. Again, I think you are an exception, not the norm. I for one did the entire trunk and I'm still not sure about it. If a month from now I don't notice the pebbles I'll be good.

Your 1 hour is not the norm, it's the exception. 4 - 8 hours is the norm.

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I apologize again for making you PMS so hard.
Me thinks it's you who is a bit over sensitive. Take a chill pill man.

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Switch to decaf, my friend.
Don't drink coffee, only beer.

Quote:
I'm not misleading anybody. If you only do a small (12 sq. ft) portion of the trunk, it IS a wham bam thank you ma'am job.
Your post I was quoting was misleading. It only mentions that the job takes 1 hour, and without referencing again that you only did a very small portion, becomes misleading. 4-8 hours is the norm, and that's what the ordinary Joe people should know.

Quote:
Even a very small amount of dynamat/bquiet/etc makes a pretty big difference in these cars.
Again, and I mean this sincerely, I'm glad the amount you did made all the difference for you. I'm sure there are others that will agree. But from what I've read here, there are many that will not.

For all,
what I found doing this is that you HAD to cover everything. Using your fingers and knuckles, you can rap on the metal to see where it sound's plinky. Before you start, almost everywhere sounds this way. But even after I covered the entire left half of the flat bottom area, the right was totally plinky sounding, like I had done nothing. Just putting down 1 piece in the middle of an area did not fix the problem either. I had to do everything to eliminate the plink. I do not agree with Raw_Shark.

So to what level you choose to do this is up to you. After doing this myself, I'd say going through all the trouble to yank everything out, if someone isn't willing to spend a measly $100-$200 to do it right, they are just being cheap. They aren't poor because they have this $30,000+ impractical car. I myself was being cheap, because I didn't want to spend $200 to do it. But now after I spent 8-9 back breaking hours doing it, the money seems irrelevant. My advice is not to skimp with stuff from Lowes (and rumors of the potential smell issue don't make me thrilled either), but to buy the best automotive industry made stuff you can find. That doesn't mean more expensive is always better, so I'd search around for a brand you find comfortable with, then buy their highest dampening stuff they have. If you want to do the entire trunk area including the fenders and back wall, it's going to take 9-10 sheets @ 18" x 36". Do less if you want, that's up to you.

Cheers --- Bonzo
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Old 03-22-2012, 08:33 AM   #4 (permalink)
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Wow, I cant believe people go thru all this time and money over a little cabin noise. Personally, it doesnt bother me what-so-ever. You guys are crazy
In my case, I bought the FatMat as well. I figured for ~ $40 I could cover the rear hatch area and well wells and down to the rear of the seats. I barely had enough to complete my job.

Additionally, I bought a $8 can of undercoating took off the rear wheels and sprayed the inside of the wheel wells.

It just so happened that I live on a street that is coming apart and the tiny pebbles were driving me crazy coming to and from my house.

My problems with road noise was only the tiney sound that the pebbles made hitting the undercarridge and wheel wells. If I'm on a road that allows me to go faster than 30mph the rocks seem to fly out under the fenders before they can even make a revolution and therefore no contact with inner fender wells. That's a good thing.

I'm glad to say that three hours later and $50 I'm pleased with the results. The sound hasn't completely gone away but, it sounds much more pleasant now. A dull thud vs. a high pitched and vibrated ping. I know it sounds like we're making too much of this but, it's not something I'd expect in a expensive street car. Something I expect out of a cheap econobox or in a race car or track car you expect it. I know why Nissan did it but I don't need the 20lbs it saves me on this item. You can still hear tire roar and tell the difference between road surfaces but, that has improved somewhat as well.

I took couple good long trips on the freeway and back mountain roads this week. Those roads had a lot of pot holes and gravel to test the work with. What I noticed is that I enjoyed the sound of the motor and stereo a lot more and it did seem to be more quiet. I could spend another $50-75 and 3-6 hrs installing more material in the doors and firewall etc... But, at this point I do not really see the need. I think I made a marked improvement over what the factory has done and at this point I do not think I need to do any more. Time will tell.

It only takes about 5-10 minutes to get all the rear panels and spare tire out of there so don't be afraid to tackle this one if you have modest skills. I can't seem to find the finished product pictures. But, here are the ones I took with all the panels out:


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Old 03-16-2012, 08:44 PM   #5 (permalink)
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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
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Old 03-17-2012, 12:15 PM   #6 (permalink)
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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
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.
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Old 03-18-2012, 10:39 AM   #7 (permalink)
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Default 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
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Old 03-19-2012, 07:29 AM   #8 (permalink)
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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.
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Old 03-16-2012, 11:23 PM   #9 (permalink)
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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.
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Old 03-17-2012, 10:58 AM   #10 (permalink)
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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..
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Old 03-19-2012, 08:03 PM   #11 (permalink)
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Just my 2 cents on the noise level. It's a sports car. Not a high-end sports car...but a good one with great lines. It's NOT a stuffy Z4. Or, Audi TT. Etc., etc. There were several things I didn't even consider when I bought mine.

STEREO - I turned it off. I wanted to hear the engine.

ROAD NOISE - Didn't care. Was too busy enjoying a great sports car!

GAS MILEAGE - Didn't care! Ok, when I fill it up...and really only VERY briefly! I forget all about it when I drive away...

It's a gritty car. One with tons of history and fans. I honestly don't even notice the road noise. I'm too busy trying to wipe the smile off my face.

Again...just my thoughts!
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Old 03-20-2012, 09:46 AM   #12 (permalink)
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Bonzo do you ever check your personal messages?
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Old 03-20-2012, 10:21 AM   #13 (permalink)
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Bonzo do you ever check your personal messages?
Sometimes. Message Sent......
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Old 03-20-2012, 10:25 AM   #14 (permalink)
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Just a heads up, I had the wheels off the car yesterday and I checked the rear wheel wells to see how "noisy" they were when tapped with a knuckle. I found that the outer half of the driver side wheel well had a distinct ring to it when tapped. The passenger side rear wheel well was not nearly as bad, probably because the gas filler pipe changes the shape of the wheel well liner. This was after I had done a fairly extensive Dynamat job on the car (see my prior posts early in this thread). I had some rubberized undercoating in the garage so I applied a heavy coating on the outer half of both wheel wells which seemed to make a modest improvement, this should help with "pebble noise" too. My advice would be to include a heavy application of undercoating in the rear wheel wells to complement the application of Dynamat in the interior of the car.
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Old 03-20-2012, 11:01 AM   #15 (permalink)
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A couple of things to consider..
  • Dynamat on the inside of the front wheel liners on the front (black plastic) made a substantial difference in volume.
  • Dynamat (three strips spread evenly) on the metal heat shield above the muffler area stopped all the clangy vibration there.
  • Dynamat on the doors is a very substantial difference too, more than the floor of the hatch I believe.
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