 Firewall Soundproofing, Anyone know about Dynamat? |
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| JawjaPorsche |
 Dec 14 2011, 07:46 AM
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Advanced Member  Group: Members Posts: 3,463 Joined: 23-July 11 From: Clayton, Georgia Member No.: 13,351 Region Association: South East States  |
I am having my back pad recovered this winter. While it is out, I am considering soundproofing the firewall.
One of my friends used Dynamat on his 67 GTO's floorboard when he restored it and swears by it. Does anyone have thoughts or am I wasting my time and money? http://www.amazon.com/Dynamat-10435-Xtreme...f=pd_sim_auto_3 |
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| bryanf |
Dec 15 2011, 11:53 AM
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Member Group: Members Posts: 105 Joined: 18-January 06 From: Half Moon Bay, CA Member No.: 5,435 |
Dynamat is best at damping out resonating panels and not really blocking sound (although it will do some of that). The best thing to use to block sound is Mass Loaded Vinyl (MLV), preferably one that is foam backed (you put the foam side towards the firewall so the MLV is 'floating' and doesn't resonate with the firewall). Many people recommend a combination of dynamat (or any of the cheaper knock-offs) covering a 1/4 of the area of the firewall (or any other panel) to kill resonance with a closed-cell foam MLV to block noise. The other trick with the MLV is to make sure you completely cover the firewall...any gaps really let the sound in.
I haven't done this to my 914, but I followed this strategy for my Elise and it made a huge difference...the car is actually pleasant to commute in. |
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Posts in this topic
JawjaPorsche Firewall Soundproofing Dec 14 2011, 07:46 AM
SLITS I went to Home Depot and bought their brand of goo... Dec 14 2011, 08:11 AM dflesburg We use it.
You can save some money and get fatmat... Dec 14 2011, 08:11 AM Phoenix-MN I used Dynamat through-out the interior. With the... Dec 14 2011, 08:36 AM effutuo101 Getting ready to spray my lizardskin soon. Both th... Dec 14 2011, 08:50 AM Philip W. Is that just used on the inside? What is the best ... Dec 14 2011, 08:51 AM
saigon71
Is that just used on the inside? What is the best... Dec 14 2011, 10:19 AM infraredcalvin I used dynamic on my doors hoping to help my anemi... Dec 14 2011, 08:57 AM Eric_Shea http://www.914world.com/bbs2/index.php?sho...;hl=s... Dec 14 2011, 10:31 AM Tom_T
http://www.914world.com/bbs2/index.php?sho...;hl=... Dec 14 2011, 05:12 PM jaxdream
[quote name='Eric_Shea' post='1588546' date='Dec ... Dec 15 2011, 12:09 AM Mark Henry I used brown bread on my VW bus, I think it was ... Dec 14 2011, 05:23 PM ellisor3 I used Dynamat throughout the interior (page 13 in... Dec 15 2011, 07:18 AM effutuo101 Lizard skin can be used in layers for inside and o... Dec 15 2011, 07:30 AM JawjaPorsche I appreciate everyone's input on this topic. ... Dec 15 2011, 12:43 PM stugray For >15 years, I have been hauling around a rol... Dec 15 2011, 10:16 PM carr914 Zach & I have used RamMat. It now comes in squ... Dec 16 2011, 07:20 AM |
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