Sound proofing experiment on the 370Z

DEpointfive0 · 09-08-2015, 04:53 PM

If you don't want to add weight, add a bunch of home insulation, it absorbs sound surprisingly well. It's just super ghetto

370bluez · 09-08-2015, 05:13 PM

Quote:

Originally Posted by DEpointfive0

If you don't want to add weight, add a bunch of home insulation, it absorbs sound surprisingly well. It's just super ghetto

Makes sense. OEMs use similar products underneath carpets.

Dirk McGurck · 09-09-2015, 10:36 AM

Do you have any exhaust work?

370bluez · 09-09-2015, 11:36 AM

Quote:

Originally Posted by Dirk McGurck

Do you have any exhaust work?

100% stock.

Dirk McGurck · 09-10-2015, 05:30 AM

The Infiniti G weighs like 400lbs more, though. And that's all sound proofing.

And the Z is a light coupe. Compared to most cars in its class it weighs a couple hundred pounds less.

370bluez · 09-10-2015, 09:54 AM

Quote:

Originally Posted by Dirk McGurck

The Infiniti G weighs like 400lbs more, though. And that's all sound proofing.

And the Z is a light coupe. Compared to most cars in its class it weighs a couple hundred pounds less.

It is over a foot longer and has a back seat... A Porsche boxster S is 350lb lighter. Anyways ...

There aren't many 2 seater sports cars around the z size other than the corvette which is roughly the same weight while packing 100+ hp

Dirk McGurck · 09-10-2015, 11:18 AM

But to be fair, our floorboards aren't made of balsa wood.

mishuko · 09-11-2015, 07:26 AM

Quote:

Originally Posted by Dirk McGurck

But to be fair, our floorboards aren't made of balsa wood.

i swear they are made of some sort of engineered metal to transfer the sound from the tires into your ear balls

370bluez · 09-11-2015, 08:24 PM

Put some dynamat in the wheel wells with FK on top and some frost king on the wheel liners. Really shitty pics... sorry about that. Will report DB findings later.

Dirk McGurck · 09-14-2015, 05:04 PM

Quote:

Originally Posted by 370bluez

Put some dynamat in the wheel wells with FK on top and some frost king on the wheel liners. Really shitty pics... sorry about that. Will report DB findings later.

My Mazdaspeed had stuff on the liners. I feel like I mostly hear sound from the back, but I can see how adding on both ends would help. When my house is done and I have my own garage, I'm probably going to start adding this to the hatch area first and work forward. First order of business is finding the F*CKING heatshield that's rattling right now. Makes me feel like a Civic...

Chuck33079 · 09-11-2015, 09:07 PM

I've considered using some of the exterior spray on deadening in the rear wheel wells to really cut down the noise. That may be the ticket.

370bluez · 09-14-2015, 12:41 PM

Final update.

Approximately 3-4 DB decrease from stock. The car is now decent in terms of road noise and you can easily hold a conversation with a passenger without feeling like you're in a club.

Total weight add was around 4-5lbs. Totally WORTH it mod in my mind.

No this car is not a VAULT as some like to describe these experiences. But it is certainly more livable and no longer a nuisance.

TexasChuck · 09-14-2015, 01:12 PM

BlueZ, What is the name of that CCF FrostKing? I haven't been able to find it.
Thanks
I like the sound deadening spray idea. If we could just get a even application.

370bluez · 09-14-2015, 01:43 PM

Quote:

Originally Posted by TexasChuck

BlueZ, What is the name of that CCF FrostKing? I haven't been able to find it.
Thanks
I like the sound deadening spray idea. If we could just get a even application.

I would recommend going the same route as me and adding Dynamat around the wheel wheels since it adds an initial layer of mass damping. Even with those two layers in place there is still room for improvement in that area. There is a TON of noise coming from there from the factory.

Frost king Fv516

Shop Frost King 15-ft Roll Insulation at Lowes.com

TexasChuck · 09-14-2015, 02:57 PM

That's for sure. I just returned from a 6 week, 6095 miles road trip.
PS: America is a beautiful place.
Regards

09-08-2015, 04:53 PM	#1 (permalink)
DEpointfive0 A True Z Fanatic Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17152	If you don't want to add weight, add a bunch of home insulation, it absorbs sound surprisingly well. It's just super ghetto __________________ Do YOU want to know what/where I got my username from? ( Click to show/hide ) NSFW due to language:

09-09-2015, 10:36 AM	#3 (permalink)
Dirk McGurck Track Member Join Date: Jun 2014 Location: Delaware Posts: 715 Drives: 09 MB 370Z Touring Rep Power: 22	Do you have any exhaust work? __________________ 2009 370Z Touring with Sport

09-10-2015, 05:30 AM	#5 (permalink)
Dirk McGurck Track Member Join Date: Jun 2014 Location: Delaware Posts: 715 Drives: 09 MB 370Z Touring Rep Power: 22	The Infiniti G weighs like 400lbs more, though. And that's all sound proofing. And the Z is a light coupe. Compared to most cars in its class it weighs a couple hundred pounds less. __________________ 2009 370Z Touring with Sport

09-10-2015, 11:18 AM	#7 (permalink)
Dirk McGurck Track Member Join Date: Jun 2014 Location: Delaware Posts: 715 Drives: 09 MB 370Z Touring Rep Power: 22	But to be fair, our floorboards aren't made of balsa wood. __________________ 2009 370Z Touring with Sport

09-11-2015, 08:24 PM	#9 (permalink)
370bluez Base Member Join Date: Apr 2015 Location: Kali Posts: 54 Drives: 12 370z Rep Power: 11	Put some dynamat in the wheel wells with FK on top and some frost king on the wheel liners. Really shitty pics... sorry about that. Will report DB findings later. Dirk McGurck likes this.

09-11-2015, 09:07 PM	#11 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	I've considered using some of the exterior spray on deadening in the rear wheel wells to really cut down the noise. That may be the ticket. TexasChuck likes this. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

09-14-2015, 12:41 PM	#12 (permalink)
370bluez Base Member Join Date: Apr 2015 Location: Kali Posts: 54 Drives: 12 370z Rep Power: 11	Final update. Approximately 3-4 DB decrease from stock. The car is now decent in terms of road noise and you can easily hold a conversation with a passenger without feeling like you're in a club. Total weight add was around 4-5lbs. Totally WORTH it mod in my mind. No this car is not a VAULT as some like to describe these experiences. But it is certainly more livable and no longer a nuisance.

09-14-2015, 01:12 PM	#13 (permalink)
TexasChuck Track Member Join Date: Oct 2012 Location: SE Texas Posts: 556 Drives: 2014 Black Cherry Co Rep Power: 14	FrostKing? BlueZ, What is the name of that CCF FrostKing? I haven't been able to find it. Thanks I like the sound deadening spray idea. If we could just get a even application. Last edited by TexasChuck; 09-14-2015 at 01:14 PM. Reason: New Thought?

09-14-2015, 02:57 PM	#15 (permalink)
TexasChuck Track Member Join Date: Oct 2012 Location: SE Texas Posts: 556 Drives: 2014 Black Cherry Co Rep Power: 14	Ton of Noise! That's for sure. I just returned from a 6 week, 6095 miles road trip. PS: America is a beautiful place. Regards BettyZ likes this.

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