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. |
Originally Posted by VertBert
(Post 1210697)
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.
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Originally Posted by VertBert
(Post 1210697)
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.
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1 Attachment(s)
https://www.miataturbo.net/attachmen...ine=1425355084
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. |
2 Attachment(s)
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. https://www.miataturbo.net/attachmen...ine=1425387474Insulation by simonholehan, on Flickr Then a foam/felt type matting, whole interior, up the front firewall and rear bulkhead, the parcel shelf etc. https://www.miataturbo.net/attachmen...ine=1425387474Felt 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. |
This guy probably has IMO the best example of proper sound deadening.
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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. |
Originally Posted by DNMakinson
(Post 1211788)
Snotrag, could you give a P/N for the 3M product?.
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. |
1 Attachment(s)
Originally Posted by snotrag
(Post 1211667)
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. https://www.miataturbo.net/attachmen...ine=1425387474Insulation by simonholehan, on Flickr Then a foam/felt type matting, whole interior, up the front firewall and rear bulkhead, the parcel shelf etc. https://www.miataturbo.net/attachmen...ine=1425387474Felt 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. How do you like this dyno? Attachment 184296 |
Originally Posted by HHammerly
(Post 1211884)
Worked at 3M for a few years doing NVH R&D work and your setup looks very good,
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