Cabin noise

Pauly · 06-05-2012, 06:10 AM

i think kenchan has a g35 and a Z. you could PM him

Dwight Frye · 06-05-2012, 05:00 PM

Quote:

Originally Posted by Magic Bus

Currently own a 2004 base auto G35 Coupe and I have a 2013 Z 6mt Sport Package on order. For those of you who have owned a G35 Coupe around my year, how much louder is the road noise on the Z?

Let's say on a scale of 1 to 10 and the G35 is a 5, what would the Z be? And is this noise just on concrete highways?

I did take a 20 minute test drive with the Z on the highway and some bumpy/beat up back roads and it seemed quieter and smoother than my G35, however this was all on asphalt.

You want to know how much louder the 370Z is ? Strip the carpeting and mat out of the trunk of your G35 and fold down the rear seat. That's a good start.
I owned a 2004 G35 Coupe and it was about half as loud as the Z. As much as I love my 370, the tire & road noise is so obtrusive it just about ruins long freeway road trips. You can barely hear the stereo unless it's turned up to 13 or 14 and forget hearing the quieter passages of songs or having a conversation with a passenger without speaking LOUDLY. Spirited mountain drives, not so much of an issue...

Magic Bus · 06-06-2012, 03:30 AM

Dwight, your explanation of strip the carpeting and mat out of the trunk and fold down the rear seat was excellent. Thanks for your help.

wilsonp · 06-08-2012, 11:04 PM

Red Barchetta is definitely set in the future, so I always take it to be a hovercraft / spinner like Blade Runner.

cossie1600 · 06-08-2012, 11:58 PM

I did a long drive today, car was above 80db+ (indicated on my phone) @ 75mph 6th gear cruise, definitely loud

psibrr · 06-23-2012, 07:03 PM

read the whole thread, long as it was. thx for all the prose and pics.
might try the rubber matting ritual ..

haven't had problem with tire noise per se, the 19's are 12 lbs ea. lighter than the 18's on the 350, so expected higher frequency road resonance. i like the feedback, can tell difference between yellow and white paint, which is useful.

seen too many references to 60mph levels. btw, dealers only test to 70, so my issue not addressable by them, which is more triple digit.

my 08 350e mt cruised fine at 135, no bassy drone. but 370/sp is droning w/ horrible booming from 90 up.. starts getting loud @95, and just increases, 130sounds like one is inside a fully loaded 4 prop b-52 bomber. maybe tires are main culprit.

wonder if hatch < the door that's raised with the window in it> could be packed inside with dynamat stuff, along with trunk surfacing?

once, maybe 3 decades back, read in a car mag that the ticking heard in the jag sedan was courtesy of 500 lbs of wool. today we have rubber with air cells etc. so 20 lbs or so for acoustic control isn't much in comparison even if it doesn't get the tick tock.

with xtra 20HP from straight H exhaust one could use up to 190 lbs of acoustic insulation, and keep same weight / power ratio as with stock zero; 500 lbs would require 380hp

RiCharlie · 06-23-2012, 10:56 PM

Quote:

Originally Posted by cossie1600

I did a long drive today, car was above 80db+ (indicated on my phone) @ 75mph 6th gear cruise, definitely loud

Tell me about this ap that you have that measures sound levels..sounds interesting...

rebe945 · 06-24-2012, 07:55 PM

Quote:

Originally Posted by RiCharlie

Tell me about this ap that you have that measures sound levels..sounds interesting...

I was wondering who that was. Nice

rebe945 · 06-24-2012, 08:02 PM

Quote:

Originally Posted by Magic Bus

Dwight, your explanation of strip the carpeting and mat out of the trunk and fold down the rear seat was excellent. Thanks for your help.

a dynamat like product and some carpet insulation over the sound deading material. Gee I did that and the noise is fine. On asphalt, its as quiet as any car ive driven.

SurfDog · 09-06-2012, 01:12 PM

I put Dynamat all over my hatch area (both shock pillars and the latch area all the way up to the backs of my seats). Also I put some as far up into my left fender as I could reach (the right fender is not accessible from the hatch area)

It helped, but the car is still noisy.

now I'm ordering materials to coat the inside of the doors. I will see if that helps.

the guys that make GT Mat are offering free samples (10 ft square) of there product to members. you will need more like 30 to really get after the hatch and (I'm guessing) 20 or so for the doors (some is wasted when you trim the sheets to fit your panel shapes.)

Here is a photo of my Hatch as i was just getting started putting down the mat. I spoke with my dealer service manager and he tols me how to get all the trim out. (it is easy)
http://www.the370z.com/members/surfd...namat-put.html

OldGuy · 09-06-2012, 10:11 PM

Cabin noise drove me crazy. I replaced my tires with Continentals and the whole cabin noise problem went away. Cut the noise by at least 60 to 70%. Best $850.00 I ever spent!

Pintsize725 · 09-06-2012, 10:50 PM

Quote:

Originally Posted by SurfDog

the guys that make GT Mat are offering free samples (10 ft square) of there product to members. you will need more like 30 to really get after the hatch and (I'm guessing) 20 or so for the doors (some is wasted when you trim the sheets to fit your panel shapes.)

Link to this?

OldGuy · 09-07-2012, 11:24 AM

Quote:

Originally Posted by cmdjing

If you have the sport package with the 19" wheels, you have the Bridgestone Potenza RE050A's. According to tirerack, they are in the middle of the field of "max" performance summer tires and the road noise is the same. If the noise is really a concern, switch to the Continental extreme contact DW's which are significantly better noise wise than any other performance tire.

That's the set I used to replace my stock tires. Worked wonders! I recommend it to anyone concerned about road noise.

edub370 · 09-07-2012, 11:42 AM

Quote:

Originally Posted by Dwight Frye

You want to know how much louder the 370Z is ? Strip the carpeting and mat out of the trunk of your G35 and fold down the rear seat. That's a good start.
I owned a 2004 G35 Coupe and it was about half as loud as the Z. As much as I love my 370, the tire & road noise is so obtrusive it just about ruins long freeway road trips. You can barely hear the stereo unless it's turned up to 13 or 14 and forget hearing the quieter passages of songs or having a conversation with a passenger without speaking LOUDLY. Spirited mountain drives, not so much of an issue...

err.... what kinda roads u driving on....???

i have test pipes and a CNT cat back and i car carry on a conversation very quietly at 70mph.

hadokenuh · 09-07-2012, 02:18 PM

Quote:

Originally Posted by OldGuy

Cabin noise drove me crazy. I replaced my tires with Continentals and the whole cabin noise problem went away. Cut the noise by at least 60 to 70%. Best $850.00 I ever spent!

Just curious, Continental DW or DWS?

06-05-2012, 06:10 AM	#616 (permalink)
Pauly Track Member Join Date: Feb 2012 Location: Lafayette, La Posts: 645 Drives: and parks Rep Power: 14	i think kenchan has a g35 and a Z. you could PM him __________________ Gun Metallic 2012 370 Z 7AT

06-08-2012, 11:04 PM	#619 (permalink)
wilsonp A True Z Fanatic Join Date: Jul 2010 Location: Virginia Posts: 1,134 Drives: 2009 Touring Sp Nav Rep Power: 16	Red Barchetta is definitely set in the future, so I always take it to be a hovercraft / spinner like Blade Runner. __________________ 2014 Cayman S PDK Sport Chrono White/Black Was 2009 370Z Touring Sport+Nav 7AT Metallic Black/Persimmon Was 1991 NSX Auto Black/Black

06-23-2012, 07:03 PM	#621 (permalink)
psibrr Base Member Join Date: Jan 2009 Location: jax, fl Posts: 19 Drives: 12 370z MT S/P BC Rep Power: 16	noise v. speed read the whole thread, long as it was. thx for all the prose and pics. might try the rubber matting ritual .. haven't had problem with tire noise per se, the 19's are 12 lbs ea. lighter than the 18's on the 350, so expected higher frequency road resonance. i like the feedback, can tell difference between yellow and white paint, which is useful. seen too many references to 60mph levels. btw, dealers only test to 70, so my issue not addressable by them, which is more triple digit. my 08 350e mt cruised fine at 135, no bassy drone. but 370/sp is droning w/ horrible booming from 90 up.. starts getting loud @95, and just increases, 130sounds like one is inside a fully loaded 4 prop b-52 bomber. maybe tires are main culprit. wonder if hatch < the door that's raised with the window in it> could be packed inside with dynamat stuff, along with trunk surfacing? once, maybe 3 decades back, read in a car mag that the ticking heard in the jag sedan was courtesy of 500 lbs of wool. today we have rubber with air cells etc. so 20 lbs or so for acoustic control isn't much in comparison even if it doesn't get the tick tock. with xtra 20HP from straight H exhaust one could use up to 190 lbs of acoustic insulation, and keep same weight / power ratio as with stock zero; 500 lbs would require 380hp

09-06-2012, 01:12 PM	#625 (permalink)
SurfDog A True Z Fanatic Join Date: May 2012 Location: Colorado (9000 feet) Age: 56 Posts: 1,793 Drives: 09 6mt, 13 Sequoia, Rep Power: 15748	I put Dynamat all over my hatch area (both shock pillars and the latch area all the way up to the backs of my seats). Also I put some as far up into my left fender as I could reach (the right fender is not accessible from the hatch area) It helped, but the car is still noisy. now I'm ordering materials to coat the inside of the doors. I will see if that helps. the guys that make GT Mat are offering free samples (10 ft square) of there product to members. you will need more like 30 to really get after the hatch and (I'm guessing) 20 or so for the doors (some is wasted when you trim the sheets to fit your panel shapes.) Here is a photo of my Hatch as i was just getting started putting down the mat. I spoke with my dealer service manager and he tols me how to get all the trim out. (it is easy) http://www.the370z.com/members/surfd...namat-put.html __________________ 09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix Last edited by SurfDog; 09-06-2012 at 01:23 PM.

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06-06-2012, 03:30 AM	#618 (permalink)
Magic Bus A True Z Fanatic Join Date: May 2012 Location: Honolulu Posts: 1,427 Drives: 17 6MT M2 Rep Power: 18753	Dwight, your explanation of strip the carpeting and mat out of the trunk and fold down the rear seat was excellent. Thanks for your help.

06-08-2012, 11:58 PM	#620 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 29	I did a long drive today, car was above 80db+ (indicated on my phone) @ 75mph 6th gear cruise, definitely loud

09-06-2012, 10:11 PM	#626 (permalink)
OldGuy Base Member Join Date: Dec 2009 Location: Greensburg PA Posts: 899 Drives: '09370Z Red Base A7 Rep Power: 16	Cabin noise drove me crazy. I replaced my tires with Continentals and the whole cabin noise problem went away. Cut the noise by at least 60 to 70%. Best $850.00 I ever spent!