Road noise
Pro
Joined: Jul 2016
Posts: 555
Likes: 265
From: Idaho
My 16 base stingray was way quieter than my current 17 GS, those big Run flat tires are loud and there are currently NO replacements for them in RF as I can find and not even any all season tires for the rear. I think there are some for front sizes. I got some of the thin insulation from LOWES and slid under seats, behind seat, over carpet in cargo area and placed 2 harbor freight black moving blankets over them and then put a custom Lloyds mat over this in cargo area and it cut noise down a lot. Cheap and you can't tell they are there and the lloyd mat covers it all up in the cargo area. I didn't want to rip any carpet up to install anything so I put it over the existing carpet. Good luck
Thread Starter
Intermediate
Joined: Nov 2017
Posts: 38
Likes: 3
I tried the Blockit kit on my 2016 Z06 coupe. The "before" tire roar was indistinguishable from "after" tire roar. My wife has super hearing so I subjected her to a blindfold test. With a blanket covering the rear interior, I did four 'with/without' trials. Like me, she detected no difference in tire noise.
OTOH, I test drove back to back a 2017 Stingray vs Grand Sport vs Z06 under controled conditions (same road, same speed). The Stingray was noticeably quieter than the GS and Z06. This tells me the only thing that matters is the tire size.
OTOH, I test drove back to back a 2017 Stingray vs Grand Sport vs Z06 under controled conditions (same road, same speed). The Stingray was noticeably quieter than the GS and Z06. This tells me the only thing that matters is the tire size.
Last edited by roller11; Dec 3, 2017 at 04:30 PM.
Team Owner
Joined: Sep 2000
Posts: 25,025
Likes: 2,716
From: Far NW 'burbs of Chicago
St. Jude Donor '13
I'm guessing that you couldn't see behind you.
I'm wondering how weird it would look to make one like that, but with a window in it. Maybe double-pane polycarbonate.
I had a half partition in my C5 Z07, and it worked great except that it would get loose under hard braking (think track). I seem to recall that it did knock down some of the sound.
I'm wondering how weird it would look to make one like that, but with a window in it. Maybe double-pane polycarbonate.
I had a half partition in my C5 Z07, and it worked great except that it would get loose under hard braking (think track). I seem to recall that it did knock down some of the sound.
(compared to our C6)
Racer
Joined: Dec 2016
Posts: 283
Likes: 51
From: BaitingHollow NY
I have purchased a few things like insulation material etc and am planning on pulling out the seats and carpet and lining it Weill with sound proofing material... my next plan is .... there is a material that hooks to the tethers and drops down to the hump right behind the seats...I'm considering removing that material and making a baffle that will sit there. It will be below the rear view mirror so you'll be able to see out of it and it will all be out of the way of the rear speakers..... It has to work....
say Wile E coyote....
say Wile E coyote....
Last edited by dbintegrity; Dec 3, 2017 at 06:51 PM.
Dazed Confused & Verklemp
Joined: May 2008
Posts: 1,400
Likes: 110
From: Naples, FL & Clear Lake, IA
My 15' Z51 was quieter than my C5 but louder than my other 3 cars. So, I installed FatMat and the companion rubber product, all over the rear, and the bulkhead behind the seats. I also replaced the tires with non-run-flat Pilot SS. The car is much quieter, except on grooved concrete, which also upsets my two other cars with Pilot SS. My next noise improvement planned is to pull the rear fender liners and cover them with Fat Mat. Since most of the noise is generated from the tires, it seems logical to place as many sound deadening layers between them and the cabin.
Changing tires from Michelin Pilot SS probably would help, say to a different tread design like I have on my Explorer Sport (Continental DWS 06 all season), but unfortunately most max performance summer tires all have similar tread designs, and I don't believe Conti DWS come in correct size for a Z06. The Conti DWS are far quieter than the original Exp Sport tires so tires do make a big difference.
If you need tire noise info, I would contact a Tire Rack specialist.
Changing tires from Michelin Pilot SS probably would help, say to a different tread design like I have on my Explorer Sport (Continental DWS 06 all season), but unfortunately most max performance summer tires all have similar tread designs, and I don't believe Conti DWS come in correct size for a Z06. The Conti DWS are far quieter than the original Exp Sport tires so tires do make a big difference.
If you need tire noise info, I would contact a Tire Rack specialist.
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Race Director
Joined: Jul 2004
Posts: 14,616
Likes: 219
From: Ohio
I put dynamat extreme and the block-it into my 2015 Z51 coupe. It helps, but it'll never be as quiet as my Mercedes E400.
I just turn up the radio!
I just turn up the radio!
Last edited by gpotski; Dec 3, 2017 at 10:21 PM.
Advanced
Joined: Dec 2007
Posts: 62
Likes: 25
From: Tahoe area NV
I installed the blockit deck mat and seat back pads in my '16 Z-06. I did notice a subtle difference, but our roads are nearly all asphalt. I'm still on the run-flats, but looking at other options in the spring.
I swapped out the run-flats on my E350 for Conti's and the difference was amazing. Much quieter and much better ride through the mountains here.
I hope you find a solution. Sure is a fun car, but noise is part of the package...
Cheers
I swapped out the run-flats on my E350 for Conti's and the difference was amazing. Much quieter and much better ride through the mountains here.
I hope you find a solution. Sure is a fun car, but noise is part of the package...
Cheers
Last edited by Kenpokev; Dec 3, 2017 at 10:52 PM.
Thread Starter
Intermediate
Joined: Nov 2017
Posts: 38
Likes: 3
In my research, the only noise measurement done showed no difference between run flats and non-RFs. I suspect that the "big difference" people are just repeating what others have said, not first hand earwitness comparisons.
Last edited by roller11; Dec 8, 2017 at 07:45 PM.
Team Owner
Joined: Sep 2000
Posts: 25,025
Likes: 2,716
From: Far NW 'burbs of Chicago
St. Jude Donor '13
It seems that tread pattern and depth are the issue with noise, sidewall stiffness doesn't seem to have much effect.
Switching from a well worn set of tires to the exact same model, but new, will usually reduce noise noticably. I noticed that on our C6s.
Last edited by Gearhead Jim; Dec 8, 2017 at 08:48 PM.
Le Mans Master
Joined: May 2000
Posts: 8,729
Likes: 1,508
From: Redmond WA
So what does work? You're pretty quick to point out what doesn't so what's the solution? Just tire width?
Last edited by davepl; Dec 9, 2017 at 11:33 AM.
Thread Starter
Intermediate
Joined: Nov 2017
Posts: 38
Likes: 3
My guess is that two things affect noise, tread width and tread depth. The observation that OEM Michelin run flats have both wide tread (335mm for the rears) and shallow tread (7.8 32 seconds) supports this. Toyo Tires have a 500 mile trial period that allows the buyer to get a full refund if dissatified with the purchased tires for any reason. My next move would be to get wide tires with deep tread. If that doesn't work, I'll go to narrow tires and deep tread. If still no work, I get my money back and go back to OEM run flats.
Burning Brakes
Joined: Oct 2014
Posts: 802
Likes: 122
From: Goodyear Arizona
