Cabin noise

pokeyl · 01-18-2011, 12:59 AM

Dynamat Xtreme, 10 Sq feet all under the spair and up the aft buklhead, (I did not remove any trim parts), I'm very happy with the results. now I can hear the noise from the doors. Best 10 pound I have ever put in a car.

Bodytechz · 01-18-2011, 12:32 PM

Michelin Pilot Sport A/S Plus, great tire, more mileage and much quieter!

trainsales · 01-18-2011, 12:37 PM

Ditto, Pokey. Did the same hatch treatment and there is a very good result. The exhaust note is not masked, but the continuous high pitched road noise is gone. I don't feel that any additional soundproofing would be necessary at this point.

I used dynamat before in other cars that already had some factory sound proofing, and it did little or nothing. But there's a big difference in the z since it otherwise has almost none in the back. I only saw a few small patches on the wheel well.

Bodytechz · 01-18-2011, 12:45 PM

trainesales, Thanks for the info AND the Photo. Think i'll be doing that myself when my Z order comes in!

Chriz · 01-19-2011, 02:06 AM

Quote:

Originally Posted by LunaZ

You can most certainly add hundreds of dollars worth of sound deadening material to the car. Gut the interior, pad it, Dynamat it and whatever else works, then put it all back together... or pay someone to do it.
You can shop for the quietest tires on the market and replace the stock Potenzas.
At the end of it all, it probably still won't be quiet enough (as illustrated by the disappointing results experienced by some posters) and you will have spent a lot of money and time on trying to make the 370Z something it's not. It's not a BMW, Audi or Lexus. Take out the "performance" part of the equation, and you're left with a simple matter of economics. I'm sure it costs less to skip all the sound deadening measures that are incorporated into the aforementioned luxury brands.
If a quiet cabin was high on your priority list when shopping for cars, you made the wrong choice, plain and simple.

very well put

this thread makes me lol

ImportConvert · 01-19-2011, 04:52 AM

Quote:

Originally Posted by c41006

I am still trying to figure out why road noise bothers people so much

Having read OP's posts in other threads, OP wants a "point and shoot" luxury type car. Driver involvement is not something the OP seems interested in, and similarly, road feedback is just an annoyance to OP. Curious why OP did not go with a G37 except maybe style.

Having driven several 370Z's on extended test-drives, I never once was irritated by the noise, found it intrusive, or even thought about it until I started reading threads about it on this website. Same for this rumor of "harshness" in the upper rpm-band. The 370Z is a wonderfully refined car, I think.

RiCharlie · 01-19-2011, 08:37 AM

I agree the 370 is a wonderful car but there is no doubt it is very noisy.. I collected a number of reviews that all tell what a wonderful car it is especially for the price...but quite a few mention this one negative..

Edmunds
Once underway, it's easy to get the most out of the 370's sharp performance. In terms of handling, this latest Z is the best yet, boasting tenacious grip and sharp reflexes. Its ride quality is also more civilized than the previous car's, making the 370Z a better choice for commutes and long drives. Sadly, it has an extraordinary amount of road noise, which could grow tiresome on such journeys.

Car and Driver
Finally—and this is the big one—the sticky Bridgestones double as megaphones. Boom, slap, echo, hiss, the swishing of water, the pinging of pebbles. You name a road-borne sound, and the tires can magnify it. Perhaps it’s the fault of paper-thin wheel-well liners, because neither engine nor driveline NVH find their way as effortlessly to your tympanic membranes. At idle and at wide-open throttle, the 370Z is louder than its forebear. We’d trade a couple of points on the skidpad in return for less racket and a slightly cushier ride.

Grassroots Motorsports
Any negatives? Yeah, sorry. Road noise on some surfaces is nearly unbearable.

Auto Blog
First, while the cabin is well insulated from wind noise, it seriously resonates from tire drone. At speeds above 70 mph, or on any unfriendly pavement, the roar nearly drowns out the audio system.

Cars.com
My Sport Package-equipped tester had more road noise than any car I've tested in recent memory. On anything but perfectly smooth pavement, the tires howl endlessly once you reach 40 or 50 mph

Inside Line
Good grief this car is noisy. I know we keep going on about it, but there's really not much else to dislike about this car - but it's damn near a deal breaker

Consumer Guide Automotive
Wind rush is not noticed, only because the engine and tire noise are so intrusive

But to end on a positive note.. this seems to be the only serious problem with the 370 and its easily fixed.. and most reviewers have plenty of other positive things to say along this line from Car Advice

When you stop to consider the 370Z’s price tag then what I’m about to say will begin to make a whole lot more sense: this is the best sports car on the market under $100K.

I totally agree!!

pokeyl · 01-19-2011, 10:00 AM

Years ago Corvette Magazine did a sound reduction on a C4. 4db was the results, you may think that is not much but it is a 50% noise reduction. 6 db is 75%.

Guard Dad · 01-19-2011, 11:05 AM

In the early 90's I had the opportunity to be a transport driver for Motor Trend Magazine on two of their huge Bang-For-The-Buck tests. I was one of several people whose job it was to move the different test vehicles between the various test sites, I also changed tires and did whatever else needed doing. In this capacity I had the opportunity to put a lot of miles on a lot of different high performance cars. The thing that impressed me was how stunningly easy it was to pick up on the differences between the various cars. I was surprised to find out how easy it was to overcome my preconceptions and to determine which car had the best steering or the most supportive seats or the best transmission. I found that if I drove one car for a long time, that car became the "norm" and it was only when I switched to a different car that I became fully aware of how I had adjusted to (and in some cases compensated for) the flaws and limitations of the previous car. I have had the opportunity to drive quite a few cars over the years and the Z is unquestionably the loudest (road noise that is, I've driven lots of cars with louder exhaust systems, actually the Z's exhaust is on the quiet side). I found that the stock level of noise to be unacceptable for my intended use and accordingly, I have invested about $350.00 and a weekend of my time to address that issue. I am happy with the result and if additional affordable opportunities for further improvements present themselves I'll probably do those as well. As track cars go, the Z may be as quiet as convent at 3AM, but as a road car it's loud.

LunaZ · 01-19-2011, 07:57 PM

Adding to the "it's all relative" aspect of the discussion I had the realization today that my work environment is extremely noisy. Makes my Z seem like a library in comparison.
YRMV

Guard Dad · 01-20-2011, 12:30 AM

Absolutely! Your perception of sound is, to a certain extent, relative.

ImportConvert · 01-20-2011, 12:39 AM

Quote:

Originally Posted by Guard Dad

Absolutely! Your perception of sound is, to a certain extent, relative.

+1

I never found the Z to be loud, enjoyed how it felt like it was carved from a block of billet, and in general, had no problem with how it rode. I found more to whine about regarding the clutch being more like an on/off switch.

birdmanx1 · 01-20-2011, 08:59 AM

Richarlie, Guard_Dad, thanks for the excellent posts regarding your experience with the "noise/not noise/whatever all want to call it" reduction. I ,along with many other I suspect, found those posts particularly helpful.

I agree with many in the forum who actually provide valuable info rather than opinions that sidetrack from the main point of the forum. You car, your money, your taste, your mods regardless of opposing opinions.

I too have found myself in situations where I was struggling to hold conversations in my nismo cruising at the normal 140mph (why I am talking at those speeds is not the issue, maybe I am being chased by zoombies in other sports cars, who knows

); I don't want to eliminate the sound from this sweet & mean engine since it is part of the awesome driving experience, I wouldn't mind reducing some of the slight road "noise/not noise/whatever all want to call it".

Would adding the dynamat to the doors & trunk suffice to eliminate much of the issue? Does one also need to do apply some dynamat to the floor for complete satisfaction ? I will be using the 20lbs dynamat 9 sheet pack.

RiCharlie · 01-20-2011, 03:13 PM

Quote:

Originally Posted by birdmanx1

Richarlie, Guard_Dad, thanks for the excellent posts regarding your experience with the "noise/not noise/whatever all want to call it" reduction. I ,along with many other I suspect, found those posts particularly helpful.

I agree with many in the forum who actually provide valuable info rather than opinions that sidetrack from the main point of the forum. You car, your money, your taste, your mods regardless of opposing opinions.

I too have found myself in situations where I was struggling to hold conversations in my nismo cruising at the normal 140mph (why I am talking at those speeds is not the issue, maybe I am being chased by zoombies in other sports cars, who knows

); I don't want to eliminate the sound from this sweet & mean engine since it is part of the awesome driving experience, I wouldn't mind reducing some of the slight road "noise/not noise/whatever all want to call it".

Would adding the dynamat to the doors & trunk suffice to eliminate much of the issue? Does one also need to do apply some dynamat to the floor for complete satisfaction ? I will be using the 20lbs dynamat 9 sheet pack.

I can only tell you that the doors have no sound dampening at all and when I got that done it made a big difference. I am going to have the wheel wells done next.. I had the hatch area done previously and cant say I was impressed..The sound level is better and maybe its just a combination of everything.. but the car is very different now... much MUCH better and fun to drive without the aggravation of excessive noise !! No fun driving something which is so loud I cant hear my wife's constant directions!!

SeattleLion · 01-20-2011, 03:13 PM

I've read all the noise threads and tons of reviews that complain about the 370Z noise. I've had my car for 6 months now (2010 370 Touring with sport package). I have to agree that road noise is loud. I really wasn't shocked by it. Back in the day, my 240 wasn't very quiet either.

I do agree that since I use the car as a dd, it would be nice to have less road noise. What bothers me is that many people claim no improvement with adding sound deadening to the hatch and doors. Others claim dramatic changes. There don't seem to be any objective results to analyze. It would be great if someone would measure the sound level at the driver's position before installing deadening material and then measure afterward. We could then see the difference numerically.

It's not surprising we get conflicting result reports. "Loud" and "soft" are subjective. 85db at 60mph smooth asphalt is objective.

Oil cooler issues are measurable. We all can see our oil temp and can report changes after adding a cooler. We really need to do the same thing with various sound reduction solutions.

01-19-2011, 07:57 PM	#100 (permalink)
LunaZ A True Z Fanatic Join Date: Mar 2010 Location: Vagabond Posts: 6,704 Drives: Project: a white one Rep Power: 512	Adding to the "it's all relative" aspect of the discussion I had the realization today that my work environment is extremely noisy. Makes my Z seem like a library in comparison. YRMV __________________ 2009 370Z Sport/Touring/Navigation \| see my journal for mods facebook: Be my friend... or not.

01-20-2011, 08:59 AM	#103 (permalink)
birdmanx1 A True Z Fanatic Join Date: Jun 2010 Location: Baltimore, MD Age: 95 Posts: 3,175 Drives: 370z Nismo Rep Power: 23	Richarlie, Guard_Dad, thanks for the excellent posts regarding your experience with the "noise/not noise/whatever all want to call it" reduction. I ,along with many other I suspect, found those posts particularly helpful. I agree with many in the forum who actually provide valuable info rather than opinions that sidetrack from the main point of the forum. You car, your money, your taste, your mods regardless of opposing opinions. I too have found myself in situations where I was struggling to hold conversations in my nismo cruising at the normal 140mph (why I am talking at those speeds is not the issue, maybe I am being chased by zoombies in other sports cars, who knows ); I don't want to eliminate the sound from this sweet & mean engine since it is part of the awesome driving experience, I wouldn't mind reducing some of the slight road "noise/not noise/whatever all want to call it". Would adding the dynamat to the doors & trunk suffice to eliminate much of the issue? Does one also need to do apply some dynamat to the floor for complete satisfaction ? I will be using the 20lbs dynamat 9 sheet pack. __________________ 370Z NISMO #0462 \| ClearBra \| 3M tint \| Head/Taillights \| Dynamat \| Black Roof \| Tommy Kaira HB \| CF Parts \| Berk HFCs \| FI SS \| NST Pulleys \| Takeda aFe \| K&N \| H&R Spacers \| Swift Spec R \| SPC F&R \| Zuperman M370 Nismo Vid \| Nismo Journal \| Nismo Rumble Last edited by birdmanx1; 01-20-2011 at 09:06 AM.

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01-18-2011, 12:59 AM	#91 (permalink)
pokeyl Track Member Join Date: Nov 2010 Location: DFS Posts: 896 Drives: ??? Rep Power: 54	Dynamat Xtreme, 10 Sq feet all under the spair and up the aft buklhead, (I did not remove any trim parts), I'm very happy with the results. now I can hear the noise from the doors. Best 10 pound I have ever put in a car.

01-18-2011, 12:32 PM	#92 (permalink)
Bodytechz Enthusiast Member Join Date: Jan 2011 Location: Illinois Posts: 253 Drives: '11 MB NISMO #0008 Rep Power: 14	Michelin Pilot Sport A/S Plus, great tire, more mileage and much quieter!

01-18-2011, 12:37 PM	#93 (permalink)
trainsales Base Member Join Date: Jan 2011 Location: Hawaii Posts: 28 Drives: 370z Rep Power: 14	Ditto, Pokey. Did the same hatch treatment and there is a very good result. The exhaust note is not masked, but the continuous high pitched road noise is gone. I don't feel that any additional soundproofing would be necessary at this point. I used dynamat before in other cars that already had some factory sound proofing, and it did little or nothing. But there's a big difference in the z since it otherwise has almost none in the back. I only saw a few small patches on the wheel well.

01-18-2011, 12:45 PM	#94 (permalink)
Bodytechz Enthusiast Member Join Date: Jan 2011 Location: Illinois Posts: 253 Drives: '11 MB NISMO #0008 Rep Power: 14	trainesales, Thanks for the info AND the Photo. Think i'll be doing that myself when my Z order comes in!

01-19-2011, 08:37 AM	#97 (permalink)
RiCharlie Track Member Join Date: Oct 2010 Location: Johnston RI Posts: 857 Drives: 370 Touring Spt A/t Rep Power: 15	I agree the 370 is a wonderful car but there is no doubt it is very noisy.. I collected a number of reviews that all tell what a wonderful car it is especially for the price...but quite a few mention this one negative.. Edmunds Once underway, it's easy to get the most out of the 370's sharp performance. In terms of handling, this latest Z is the best yet, boasting tenacious grip and sharp reflexes. Its ride quality is also more civilized than the previous car's, making the 370Z a better choice for commutes and long drives. Sadly, it has an extraordinary amount of road noise, which could grow tiresome on such journeys. Car and Driver Finally—and this is the big one—the sticky Bridgestones double as megaphones. Boom, slap, echo, hiss, the swishing of water, the pinging of pebbles. You name a road-borne sound, and the tires can magnify it. Perhaps it’s the fault of paper-thin wheel-well liners, because neither engine nor driveline NVH find their way as effortlessly to your tympanic membranes. At idle and at wide-open throttle, the 370Z is louder than its forebear. We’d trade a couple of points on the skidpad in return for less racket and a slightly cushier ride. Grassroots Motorsports Any negatives? Yeah, sorry. Road noise on some surfaces is nearly unbearable. Auto Blog First, while the cabin is well insulated from wind noise, it seriously resonates from tire drone. At speeds above 70 mph, or on any unfriendly pavement, the roar nearly drowns out the audio system. Cars.com My Sport Package-equipped tester had more road noise than any car I've tested in recent memory. On anything but perfectly smooth pavement, the tires howl endlessly once you reach 40 or 50 mph Inside Line Good grief this car is noisy. I know we keep going on about it, but there's really not much else to dislike about this car - but it's damn near a deal breaker Consumer Guide Automotive Wind rush is not noticed, only because the engine and tire noise are so intrusive But to end on a positive note.. this seems to be the only serious problem with the 370 and its easily fixed.. and most reviewers have plenty of other positive things to say along this line from Car Advice When you stop to consider the 370Z’s price tag then what I’m about to say will begin to make a whole lot more sense: this is the best sports car on the market under $100K. I totally agree!!

01-19-2011, 10:00 AM	#98 (permalink)
pokeyl Track Member Join Date: Nov 2010 Location: DFS Posts: 896 Drives: ??? Rep Power: 54	Years ago Corvette Magazine did a sound reduction on a C4. 4db was the results, you may think that is not much but it is a 50% noise reduction. 6 db is 75%.

01-19-2011, 11:05 AM	#99 (permalink)
Guard Dad Enthusiast Member Join Date: Aug 2010 Location: South Orange County, CA Posts: 422 Drives: 2010 370Z Silver A7 Rep Power: 14	In the early 90's I had the opportunity to be a transport driver for Motor Trend Magazine on two of their huge Bang-For-The-Buck tests. I was one of several people whose job it was to move the different test vehicles between the various test sites, I also changed tires and did whatever else needed doing. In this capacity I had the opportunity to put a lot of miles on a lot of different high performance cars. The thing that impressed me was how stunningly easy it was to pick up on the differences between the various cars. I was surprised to find out how easy it was to overcome my preconceptions and to determine which car had the best steering or the most supportive seats or the best transmission. I found that if I drove one car for a long time, that car became the "norm" and it was only when I switched to a different car that I became fully aware of how I had adjusted to (and in some cases compensated for) the flaws and limitations of the previous car. I have had the opportunity to drive quite a few cars over the years and the Z is unquestionably the loudest (road noise that is, I've driven lots of cars with louder exhaust systems, actually the Z's exhaust is on the quiet side). I found that the stock level of noise to be unacceptable for my intended use and accordingly, I have invested about $350.00 and a weekend of my time to address that issue. I am happy with the result and if additional affordable opportunities for further improvements present themselves I'll probably do those as well. As track cars go, the Z may be as quiet as convent at 3AM, but as a road car it's loud.

01-20-2011, 12:30 AM	#101 (permalink)
Guard Dad Enthusiast Member Join Date: Aug 2010 Location: South Orange County, CA Posts: 422 Drives: 2010 370Z Silver A7 Rep Power: 14	Absolutely! Your perception of sound is, to a certain extent, relative.

01-20-2011, 03:13 PM	#105 (permalink)
SeattleLion Base Member Join Date: Sep 2010 Location: Seattle WA Posts: 226 Drives: '13 Mustang GT Prem. Rep Power: 233	I've read all the noise threads and tons of reviews that complain about the 370Z noise. I've had my car for 6 months now (2010 370 Touring with sport package). I have to agree that road noise is loud. I really wasn't shocked by it. Back in the day, my 240 wasn't very quiet either. I do agree that since I use the car as a dd, it would be nice to have less road noise. What bothers me is that many people claim no improvement with adding sound deadening to the hatch and doors. Others claim dramatic changes. There don't seem to be any objective results to analyze. It would be great if someone would measure the sound level at the driver's position before installing deadening material and then measure afterward. We could then see the difference numerically. It's not surprising we get conflicting result reports. "Loud" and "soft" are subjective. 85db at 60mph smooth asphalt is objective. Oil cooler issues are measurable. We all can see our oil temp and can report changes after adding a cooler. We really need to do the same thing with various sound reduction solutions.