Sound insulation in trunk?

[wareaglescott]

Unsure whether to put sound deadening material in the trunk under the carpet. I see many people do. I am new to all this. What are the benefits to doing so? Does having the trunk covered in the material translate into any quieter of a driving experience?

[michael everson]

I did it a couple of times and found no benefit. If the back wall is insulated then your good to go.
Mike

[wareaglescott]

Thanks Mike

[WIS89]

Scott-

Thanks for asking the question. I too was curious about this. Mike's answer makes sense too. Insulate the rear wall of the cockpit, and save the effort of insulating the trunk.

Thanks Scott and Mike!

Regards,

Steve

[cgundermann]

As an option to carpet, I wanted to provide some protection in the trunk as well as a contrast to my carbon fiber trim theme - so I applied Monsterliner (Bedliner) in a color to match my guages and eventual exterior striping:

61053

[wareaglescott]

As an option to carpet, I wanted to provide some protection in the trunk as well as a contrast to my carbon fiber trim theme - so I applied Monsterliner (Bedliner) in a color to match my guages and eventual exterior striping:

61053

Wow that looks spectacular!
What is your exterior color scheme?

[AC Bill]

Carpet in the trunk does stop rattles from tools or whatever you might pack around in it. I used Velcro strips around the edge, so it could be removed easily to access fuel tank cover plates.

[Gumball]

I added one large sheet of Dynamat to the main upper area of the trunk and a small amount on the side panels, then put jute padding (foil backed) over it and carpet over that.

The lower piece of carpet is removable (and there's no insulation under it) because that is where I have the access panels for the fuel sender and pickup, as well as a storage cubby.

http://i845.photobucket.com/albums/ab15/CCRsAC/IMG_20140625_214218042_HDR1_zps74dff688.jpg (http://s845.photobucket.com/user/CCRsAC/media/IMG_20140625_214218042_HDR1_zps74dff688.jpg.html)

http://i845.photobucket.com/albums/ab15/CCRsAC/IMG_20140724_152440532_zpse1b8d15e.jpg (http://s845.photobucket.com/user/CCRsAC/media/IMG_20140724_152440532_zpse1b8d15e.jpg.html)

[wareaglescott]

I added one large sheet of Dynamat to the main upper area of the trunk and a small amount on the side panels, then put jute padding (foil backed) over it and carpet over that.

The lower piece of carpet is removable (and there's no insulation under it) because that is where I have the access panels for the fuel sender and pickup, as well as a storage cubby.

http://i845.photobucket.com/albums/ab15/CCRsAC/IMG_20140625_214218042_HDR1_zps74dff688.jpg (http://s845.photobucket.com/user/CCRsAC/media/IMG_20140625_214218042_HDR1_zps74dff688.jpg.html)

http://i845.photobucket.com/albums/ab15/CCRsAC/IMG_20140724_152440532_zpse1b8d15e.jpg (http://s845.photobucket.com/user/CCRsAC/media/IMG_20140724_152440532_zpse1b8d15e.jpg.html)

Looks very nice!
For the removable piece does it just sit there or velcro or how did you do that?

[6t8dart]

Scott-

Thanks for asking the question. I too was curious about this. Mike's answer makes sense too. Insulate the rear wall of the cockpit, and save the effort of insulating the trunk.

Thanks Scott and Mike!

Regards,

Steve

I agree, maybe add a few squares of sound dampening on the underside of the trunk panels to dampen vibration and resonance.

[Gumball]

Looks very nice!
For the removable piece does it just sit there or velcro or how did you do that?

The removable piece - seen with the edging in the pic - uses hidden snaps that were used on various British cars in the '50s and '60s. Here's a pic showing the snap that is riveted to the panel and the two pieces that are affixed through the carpet piece - the pronged ring is hidden down in the nap of the carpet and the snap portion is on the underside of the removeable piece.

These snap kits are available from places like Moss Motors or any British car restoration place.

*** if you go to the picture of the trunk carpet above and magnify it, you'll see the rings from the hidden pronged pieces. Those were only visible after installation and have since disappeared as the carpet has settled with use.

http://i845.photobucket.com/albums/ab15/CCRsAC/IMG_20140705_110120002_zps79ecc26a.jpg (http://s845.photobucket.com/user/CCRsAC/media/IMG_20140705_110120002_zps79ecc26a.jpg.html)

[Jeff Kleiner]

I carpet the trunks but do not insulate.

Jeff

[GoDadGo]

I carpet the trunks but do not insulate.

Jeff

Jeff,

Is the carpet enough to stop any booming and/or vibration or should Boom-Mat be used in key areas of the MK-4?
I'm specifically concerned about the cockpit.
Please Advise & Thanks!

Steve

[Jeff Kleiner]

Jeff,

Is the carpet enough to stop any booming and/or vibration or should Boom-Mat be used in key areas of the MK-4?
I'm specifically concerned about the cockpit.
Please Advise & Thanks!

Steve

I insulate and carpet the cockpits but carpet only in the trunk.

Jeff

[cgundermann]

Wow that looks spectacular!
What is your exterior color scheme?

Thanks wareaglescott, I had always planned on a titanium or gunmetal gray with tangerine stripes (similar to your avator photo) but when FFR came out with a similar paint scheme on their demo MK4, might go carbon black with the tangerine stripes or use tangerine piping on the outside of the main stripes...