[DeTomaso] Dynamat Xtreme results

[John Taphorn]

Thanks for documenting the project, to bad you can't compare before and 
after back to back.  A challenge I generally face is the amount of time 
upgrading during a resto or partial resto takes.  While I want to 
believe there is an improvement, memory doesn't always serve me well for 
measured differences.

Also, I don't recall your mishap.  I experienced a heater hose 
connection failure on a trip probably 25 years ago.  I was in NY 
visiting family.  It was quite a surprise as it was before internet 
forum days and I never anticipated it.  Spray in the face, scalded 
ankle, immediate fogging of the windshield.  I recall the rear glass had 
drops of antifreeze covering it with the exception of my silhouette.  
Fortunately was only going about 40mph and was able to pull into a 
parking lot across the street from an autoparts store. Replaced the hose 
on the spot.

How did your situation unfold?

JT
On 7/21/2013 4:51 PM, Larry Finch wrote:
> 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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