Sound Deadening Advice - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 03-02-2015, 03:25 PM   #21
Senior Member
iTrader: (2)
 
Join Date: Nov 2007
Location: Saint Paul, MN
Posts: 1,295
Total Cats: 22
Default

I installed some similar items I got from Menards;

-WeatherGuard (Peel-N-Seal copy) - only a few fractions of an inch thick, this provided a good stop to vibrations.
-Frost King duct insulation (Similar to Dynamat - has aluminum backing - USE GLOVES, CAN and DOES cut fingers if you aren't careful around cuts)
-Reflectex duct insuation - (tranny tunnel and floor only) This kept transmission tunnel heat out of the car.

This was installed on the:

-Door panels (inside of outside skin, inside of inside)
-Floorboards and transmission tunnel
-Behind the seats and in the trunk

Overall, before install the car was a beast as far as noise. It was loud and not quiet about it. However, post install I found the sound dramatically decreased and unless I'm boosting, driving over harsh road surface (or have bad tires) I can only hear the exhaust for the most part.

We have to pull the dash to replace it and when we do I will be adding damping material to the firewall as well. This is where the majority of the noise and heat comes from now, though I have yet to do the panel behind the seats as well (I have a vibration in there on my car too...)

Overall weight gain was probably less than 10 pounds, overall enjoyment of car with no A/C? Cross country tour approved.
Der_Idiot is offline   Reply With Quote
Old 03-02-2015, 05:11 PM   #22
Newb
iTrader: (2)
 
Join Date: Oct 2014
Location: Chandler, AZ
Posts: 11
Total Cats: 0
Default

Quote:
Originally Posted by VertBert View Post
Does anyone have experience with the butyl Home Depot material in hot environments? I've heard they give off a tar smell when heat cycled over, say, a southern summer.
I have a bunch of "Peel 'N Seal"-style stuff in one of my cars, it did indeed smell a bit for the first few days, but it got better over a week or so. The smell came back on hot days when the car was parked in the sun, but only for the first month or two, and I didn't find it to be overpowering. This was in the doors of a Volvo 940 to help keep the inner door parts from vibrating with the door speakers.
maplewood is offline   Reply With Quote
Old 03-02-2015, 09:13 PM   #23
Senior Member
iTrader: (8)
 
Join Date: Feb 2012
Location: Raleigh, NC
Posts: 617
Total Cats: 53
Default

Quote:
Originally Posted by VertBert View Post
Does anyone have experience with the butyl Home Depot material in hot environments? I've heard they give off a tar smell when heat cycled over, say, a southern summer.
I just had this conversation with a friend who used it all over his old bronco restoration. He said after the initial off-gas on day 1 it was fine thereafter in any conditions.
petrolmed is offline   Reply With Quote
Old 03-02-2015, 11:58 PM   #24
Junior Member
iTrader: (1)
 
that7guy's Avatar
 
Join Date: Apr 2005
Location: Bethesda, MD
Posts: 428
Total Cats: 7
Default



Three laters of Fatmat from the parcel shelf to the front of trans tunnel, both doors and trunk. Most of my noise is now coming from the firewall and under the dash. One day I'll get to that too. Sometimes I forget how quiet my car is until I sit in my friends NA or someone else's miata without any sound deadener. Ive also noticed my transmission tunnel and floorboards stay much cooler in hot temps then they did before. In total added about 20lbs to the car.
Attached Thumbnails
Sound Deadening Advice-cam00174.jpg  
that7guy is offline   Reply With Quote
Old 03-03-2015, 08:57 AM   #25
Newb
 
Join Date: Nov 2010
Location: Yorkshire, UK
Posts: 36
Total Cats: 12
Default

Definitely worth doing.

I used a 3M 'Mass damping' product first. Adhesive back, very flexible and workable, about 3mm thick rubber type matting. Cabin, inside of door skins, boot floor etc.

Insulation by simonholehan, on Flickr

Then a foam/felt type matting, whole interior, up the front firewall and rear bulkhead, the parcel shelf etc.

Felt carpet 2 by simonholehan, on Flickr



As the other posters have stated - its definitely worth the effort if you have a big project with dash out etc. Small weight penalty outweight by the big improvement in comfort and road noise.
Attached Thumbnails
Sound Deadening Advice-8963166592_77948269e8_b.jpg   Sound Deadening Advice-9069379973_fd93eaefc2_b.jpg  
snotrag is offline   Reply With Quote
Old 03-03-2015, 10:47 AM   #26
Senior Member
iTrader: (3)
 
Join Date: Feb 2006
Location: Centennial, CO
Posts: 672
Total Cats: 20
Default

This guy probably has IMO the best example of proper sound deadening.
karter74 is offline   Reply With Quote
Old 03-03-2015, 05:02 PM   #27
Elite Member
Thread Starter
 
DNMakinson's Avatar
 
Join Date: Jan 2013
Location: Seneca, SC
Posts: 2,701
Total Cats: 268
Default

Snotrag, could you give a P/N for the 3M product?

18PSI, same thing, which Ensolite did you use. I ask because Ensolite appears to be a tradename and they produce a lot of different foams.
DNMakinson is offline   Reply With Quote
Old 03-03-2015, 05:59 PM   #28
Newb
 
Join Date: Nov 2010
Location: Yorkshire, UK
Posts: 36
Total Cats: 12
Default

Quote:
Originally Posted by DNMakinson View Post
Snotrag, could you give a P/N for the 3M product?.
I cant find the original details in my email, or where I bought it from, but after a little searching I think it must have been this stuff -

PeaceMAT? XXL Car Audio Deadening Insulation 3mm 5Kg Car Heavy Layer Deadening (3m Roll) Car Audio

3M 'peacemat'

it was really nice to work with as its stretchy, so I could fit it quite well over the humps and bumps in the floor as per the picture.
snotrag is offline   Reply With Quote
Old 03-03-2015, 10:28 PM   #29
Senior Member
iTrader: (3)
 
Join Date: Dec 2007
Location: Brownsburg,IN
Posts: 800
Total Cats: 58
Default

Quote:
Originally Posted by snotrag View Post
Definitely worth doing.

I used a 3M 'Mass damping' product first. Adhesive back, very flexible and workable, about 3mm thick rubber type matting. Cabin, inside of door skins, boot floor etc.

Insulation by simonholehan, on Flickr

Then a foam/felt type matting, whole interior, up the front firewall and rear bulkhead, the parcel shelf etc.

Felt carpet 2 by simonholehan, on Flickr



As the other posters have stated - its definitely worth the effort if you have a big project with dash out etc. Small weight penalty outweight by the big improvement in comfort and road noise.
Worked at 3M for a few years doing NVH R&D work and your setup looks very good, you may try some 1/4" foam with that 3mm mat on top, a de-coupled barrier wirks really well on the shelf behind the seats that flex and reberberate the noise bouncing around in the trunk.
How do you like this dyno?
Name:  3D000E6D-3F16-4E98-A69B-E17A268AC501.jpg
Views: 139
Size:  97.8 KB
HHammerly is offline   Reply With Quote
Old 03-04-2015, 06:52 AM   #30
Newb
 
Join Date: Nov 2010
Location: Yorkshire, UK
Posts: 36
Total Cats: 12
Default

Quote:
Originally Posted by HHammerly View Post
Worked at 3M for a few years doing NVH R&D work and your setup looks very good,
Thats good to hear! Yes, very please with how it turned out. You can also just about see in those photos where I seam/stitch welded the door openings too, which I think was another incremental improvement in NVH.
snotrag is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Buzzing from driver side of engine bay? (MS3 install) nick470 MEGAsquirt 7 06-16-2017 02:53 PM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM
"Chimney Ethanol" E100 MiataGarage Engine Performance 5 09-30-2015 12:04 AM
Are my coils failing? viriiguy General Miata Chat 5 09-28-2015 08:39 PM
Interpreting Deatchwerks Dead Times from Battery Wizard compuw22c MEGAsquirt 0 09-14-2015 07:08 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 09:33 AM.