[DeTomaso] Dynamat Xtreme results

[Ken Green]

Amazon has a good price on this stuff, and orders over $25 ship free:
 
Dynamat 10455 18" x 32" x 0.067" Thick Self-Adhesive Sound Deadener with Xtreme Bulk Pack, (Set of 9) 
 
$139 shipped.
 
Ken


________________________________
From: Larry Finch <fresnofinches at aol.com>
To: detomaso at poca.com 
Sent: Sunday, July 21, 2013 2:51 PM
Subject: [DeTomaso] Dynamat Xtreme results


All,

As you may recall I learned a hard lesson as to what happens when you fail to fully tighten a heater hose
connection after doing an evaporator upgrade.

I have just finished the installation of Dynamat on 2511. Curious as to just how much it would
require to cover the interior and what the added weight would be, I made detailed before and after records of
the weight of the Dynamat I used.

I used Dynamat Xtreme in the bulk packs of 9 sheets, each 18" x 32". Each sheet is four square feet,
and the pack of nine sheets is about $150 a box on eBay. I bought two boxes, 18 sheets total.

I exhibited my typical over-thinking and over-executed technique and first made poster-board patterns
for all the various panel shapes. This allowed me to optimize waste reduction by trial-and-error placing
of the patterns on each sheet prior to actual cutting. I also installed all the pieces without overlap, instead placing them edge-to-edge.
I covered ALL the interior: rear firewall and hatch, full floor, interior rockers, wheel houses, all sides of the center tunnel,
front bulkhead and bottom portions of the cowl.

(Yes, I know Dynamat results are pretty good when just covering most of a panel instead of a full edge-to-edge covering,
but its kind of like 'clocking' the nine screws on the LeCarra steering wheel. Not necessary, but just something I do.)  

After this one-layer install, I had just three full sheets and a lot of scrap remaining. By weight, I've calculated I used
roughly 45 square feet and added about 16.5 pounds of material for that one-layer install.

I then added a second layer to the rear firewall and all sides (F to R) of the center tunnel. (I did not add a second layer to the hatch as I have had it CermaKromed at CAPS here in Fresno.)  This took about 15 square feet and added another 5.5 pounds. For most of the second layer, I was forced to piece smaller scraps together in forming the larger patterns.

In summary, I added only about 22 pounds of weight, covered the full interior with one layer and covered the
main heat-transferring panels with two layers, and spent about $300. Time spent? Patterns and installation must
have been about 40-60 hours. 

(Think that is excessive? Don't ask how many hours I spent figuring out how to adapt and cut a set of Muth signal mirrors to
fit into the two Colt electric mirrors on 2511.)

I found the Dynamat very easy to work with. Cuts easily with good scissors or box knife; a good-sized scrap of plywood serves well for the long box-knife cuts. Foil covering is VERY durable, flexible and easily formed to reasonable compound curves. When carefully handled, it can be repositioned before final press-down installation. I used a 2" rubber roller for the large surfaces, and the smooth metal handle of an old butter knife to burnish the inside and outside corners, nooks and crannies.

Next up is the aluminized adhesive-backed radiant heat barrier (COOL IT by ThermoTec) on the firewall, hatch and center tunnel.

Now if I can just get the A/C reliably working......

Larry





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