Sound deadening question?

[audioholic 5,000+ posts]

Uh, were these all closed cell foam products?

If that 'big gap filler' is the stuff Im thinking about, yeah no doubt it took alot of cans, that stuff doesn't expand much, its only made for cracks/pipes thru walls/etc... not really for filling large spaces. Expansion is pretty low on it.

Post a pic of the cans. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[casper97ta 10+ year member]

yeha i'd love a pic of the stuff that actually worked. im going to be doing my ex-cab dakota in the next couple weeks. any tips for the truck and help would be appreciated. thanks

 

[Relax 10+ year member]

Great Stuff makes a window and door version that won't pressure things out of place supposedly- is that the first stuff you used?

And is the final stuff that worked well the Normal Yellow Great Stuff?

 

[Biker 10+ year member]

The BIG GAP Filler in the red can expanded the most. About 250%.

Heres the rest of the story. Several years ago I took on this project with my 2002 Extended cab Dakota. My plan was an awesome sound system without being able to see anything.

First step was to install Comps front and rear and replace the Tray under the back seat with the MTX Thunderform enclosure, 2 10" MTX Subs rated 220 Watts rms each. Problem was where to put the 2 Amps. Thinking I was cleaver I removed the side panel's in the rear and using my Sawzall I cut out the metal and mounted an AMP inside the body. One amp per side. Replaced the side panels and the system sounded great and you would never know I had a system from looking.

There were several problems that always bothered me. One was that I could not get bigger Subwoofers in that enclosure with a

My solution so far is this. I took the hinges off the rear seat cushions and put them aside. I put 3, 1" MDF speaker rings on my thunderform and was able to install 6.5" depth Subs. Now with my subs sticking up 3" higher than before I screwed and glued down some 5" MDF blocks at several areas on each side of the subs. I then had a large area between the subs 5" tall to place 2 AMPS, Do all the wiring very neat in the back and then I placed a good painted piece of 3/4" marine plywood across the top above the subs and Amps. I then put Velcro on the seat cushion's and plywood to hold them in place. This left all the AMP setting's right there in front underneath the seats.

So heres the deal, I had this huge area in the body below the rear speakers with lots of sheet metal removed. I screwed sheet metal across all the cutouts in the side panels and filled the area with foam to about 6 inches from the rear speakers. I put Dynamat extreme behind the speakers and completley covered the entire side with more Dynamat. I also placed a large piece of Esolite foam behind the speakers before I sealed it all up.

So yea the rear seats are 5" higher than normal but the seat is functional and my kids can sit back there fine. At glancing inside you dont really notice the difference in height. I also completly covered both front doors with Dynamat and Ensolite which has made a major difference in road noise. It really hit me when I honked my horn and barely could hear it. Also with the Volume turned up loud enough to really hurt your ears it is amazingly quiet when standing outside the truck.

I am very happy so far. I think I need to upgrade some of my equipment and Dynamat the floor and roof some day. You know this hobby can be addicting.

Biker