[DeTomaso] dyna mat

[Dave Londry]

Our good buddy with the Mangusta (factory small-block chevy), Dick 
Ruzzin, gave me a great lesson on placing sound deadening material.

The point is to locate the Dynamat at the nodes (places where the 
vibration amplitide is greatest) and just enough of it to 'kill the buzz'.
It all takes some messing around, like driving around with no door 
panels installed and nothing on the inner roof.
And, the pressure of a one thumb in the right place will simply kill one 
vibration mode.

I got the doors well with one 3"x 8" piece horizontally in the middle of 
each door.
I needed to drive the car over to Detroit to have the master do the 
roof, but that would be 2500 miles each way.
On my own I did get it well damped, with four 6" x  6" pieces spread in 
a square, but I know he'd have used much less.
The roof had about 4 modes that I kept chasing around for several hours 
until i just threw extra material at them.
Dave

On 2020-05-23 10:20 a.m., David wrote:
>     Mr. Finch,
>
>
>     As an experiment I used a "dyna mat" type product on the ceiling of my
>     hot rod truck when I had the headliner (a piece of card board) out.
>     Poo, can't find the video comparison . . . .
>
>
>     You don't need to cover every inch, just a piece across the roof, you
>     will be amazed. My old truck lives outside, the stuff never comes off.
>
>
>     David in Durango
>
>
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-- 
Dave Londry
TRGuys.com

davel at trguys.com
Cell     604-721-2278
Skype    embeddedspaces

-------------- next part --------------
   Our good buddy with the Mangusta (factory small-block chevy), Dick
   Ruzzin, gave me a great lesson on placing sound deadening material.

   The point is to locate the Dynamat at the nodes (places where the
   vibration amplitide is greatest) and just enough of it to 'kill the
   buzz'.
   It all takes some messing around, like driving around with no door
   panels installed and nothing on the inner roof.
   And, the pressure of a one thumb in the right place will simply kill
   one vibration mode.

   I got the doors well with one 3"x 8" piece horizontally in the middle
   of each door.
   I needed to drive the car over to Detroit to have the master do the
   roof, but that would be 2500 miles each way.
   On my own I did get it well damped, with four 6" x  6" pieces spread in
   a square, but I know he'd have used much less.
   The roof had about 4 modes that I kept chasing around for several hours
   until i just threw extra material at them.
   Dave

   On 2020-05-23 10:20 a.m., David wrote:

   Mr. Finch,


   As an experiment I used a "dyna mat" type product on the ceiling of my
   hot rod truck when I had the headliner (a piece of card board) out.
   Poo, can't find the video comparison . . . .


   You don't need to cover every inch, just a piece across the roof, you
   will be amazed. My old truck lives outside, the stuff never comes off.


   David in Durango


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osted here to all past, current, or future members of the list. They also grant
the list owner permission to maintain an archive or approve the archiving of lis
t messages.

--
Dave Londry
TRGuys.com

[3]davel at trguys.com
Cell     604-721-2278
Skype    embeddedspaces

References

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