Dynamat for Doors? - Defender Source
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  #1  
Old January 10th, 2015, 02:41 AM
RBBailey
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Dynamat for Doors?

I picked up some Dynamat from a friend who had it left over from a project. I think other have used cheaper stuff. I don't care what brand.

I did some research, and although the 100% coverage thing is cool, even Dynamat's own publications say that on any particular piece of body work, you really only need 30% coverage for 100% effectiveness.

So, I tried a bit on the stock, bare bones doors in the Series -- WOW!

Now, don't get me wrong, it does not miraculously quiet down the drive, but without adding much weight at all, the doors open and close fantastically! They just sound solid now, catch much better, and the "experience" of shutting the doors is just way better. Worth it.

So now I'm wondering if this might translate well to the 1988 110 doors. My doors feel so flimsy, and I wonder if the vibrations during closing might be brought down in the same way it worked with the Series.

Any experience? I may pull one of the interiors off this weekend to see what I can do.
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  #2  
Old January 10th, 2015, 02:56 AM
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I recall reading similar experiences with a 90 or 110, using hush mat as well
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  #3  
Old January 10th, 2015, 06:47 AM
ezzzzzzz
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Mark Garrenton
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Second Skin products are what I've used on my 240Z and old 88" IIA. It makes a huge difference in noise reduction and ear comfort.
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  #4  
Old January 10th, 2015, 06:59 AM
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30% will reduce resonance, full cover gives the door heft and makes it feel solid.
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  #5  
Old January 10th, 2015, 09:22 AM
javelinadave
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Quote:
Originally Posted by ezzzzzzz View Post
Second Skin products are what I've used on my 240Z and old 88" IIA. It makes a huge difference in noise reduction and ear comfort.
My buddy owns Second Skin and gave me a few boxes of stuff to try out. That's my next project.
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  #6  
Old January 10th, 2015, 09:34 AM
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Abraham Bell
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I used second skin and did a large majority of the cab of the Tithonus. It made a huge difference.
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  #7  
Old January 10th, 2015, 10:40 AM
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Huge improvement on a 90 ST. Can now hear the radio and carry on a conversation. Look for my thread.
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  #8  
Old January 10th, 2015, 01:11 PM
RBBailey
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Quote:
Originally Posted by Stormer View Post
30% will reduce resonance, full cover gives the door heft and makes it feel solid.
What's interesting is that the doors "feel" heavy now, but I only added... 1/2 lbs...? Maybe?

Thanks for reviews. I'm starting with the doors, so any specifics you can tell me about application or results would be good.

What about other materials for behind trim pieces? Foam of some kind seems like it might be interesting to try tucked in behind the various upper and mid trim pieces. Keep the acoustic mat (Dynamat, Second Skin) on the metal parts.
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