DShoes Posted May 16, 2022 Share Posted May 16, 2022 Hi All, I'm looking to add some form of acoustic insulation to my '65 trunk lid, which rattles more than I'd like due to the subwoofer placement. Its got brand new weather stripping, so I know that's not the culprit. I'm curious what folks recommend that is both functional and pleasing to the eye? What I'm finding online seems functional - but not much to look at. I'm also curious if anyone has ever added insulation similar to what's available for the engine bay hood to the space between the interior and exterior trunk lid panels? I'd love to keep the underside of the trunk lid clean, if that's a option. Thanks. Link to comment Share on other sites More sharing options...
gungeey Posted May 18, 2022 Share Posted May 18, 2022 Your rattling might be clumps of dried up glue between the outside and inside trunk panels 1 Link to comment Share on other sites More sharing options...
Pat Curran Posted May 18, 2022 Share Posted May 18, 2022 1 hour ago, gungeey said: Your rattling might be clumps of dried up glue between the outside and inside trunk panels That's what the issue was with my 69. Link to comment Share on other sites More sharing options...
DShoes Posted May 18, 2022 Author Share Posted May 18, 2022 No old glue on this end. Trunk lid was removed, stripped, sanded and painted last Fall. I’m dealing with acoustic vibration. Link to comment Share on other sites More sharing options...
JZRIV Posted May 18, 2022 Share Posted May 18, 2022 I'd contact a competent automotive sound system installer. They will know what all is available for your particular problem. Aside from adding general sound deadening, you could also have a situation where the inner and outer trunk lid skins come in contact with each other. They are spot welded so there will be gaps that will vibrate with a sub. Due to the design of the inner skin, these gaps aren't accessible and that can make it very challenging to eliminate hence suggestion to contact a professional. 1 1 Link to comment Share on other sites More sharing options...
Turbinator Posted July 6, 2022 Share Posted July 6, 2022 As an adjunct to your sound/vibration problem you might consider getting a device that measures dB. With a before and after instrument that measures sound level you can eliminate guess work. I have the instrument but I cannot remember the name of the thing. Turbinator Link to comment Share on other sites More sharing options...
RIVNIK Posted July 6, 2022 Share Posted July 6, 2022 Greetings,Shoes. My '65 trunk lid doesn't rattle, but then I don't have a subwoofer. But I went out to have a look at it to refresh my memory & possibly offer some ideas. I knew the problem was due to the inner & outer panels being loosely attached to each other & was thinking some type of caulking or sealer could be squished into the "cracks" around each of the depressed areas under the lid. Today, upon closer inspection I discovered that someone from the body shop had pushed thin stainless washers into the cracks in several places. They went unnoticed by me for at least 22 yrs (since the Riv was last painted(the washers having no paint on them)) & they seem to have done the trick, because I figure they knew there must have been a problem if they were used, right? Of course if Fisher had put seam sealer around the entire openings there wouldn't be a problem. Maybe you need to turn up the bass & crawl in there with a sixpack, flashlight, & some shims. with any luck it might be only one or two spots that are resonating. Another idea I wonder if anyone has tried is injecting expanding foam insulation into the large spaces behind the braces? Not sure what the expansion strength of that stuff is. It could tighten everything up, or I suppose it could blow it all apart. If not, that might cure the problem. then one would have to figure out how to trim the excess or plug the openings for appearance. Anyone got an old lid to experiment on? good luck, Drew Link to comment Share on other sites More sharing options...
DShoes Posted July 6, 2022 Author Share Posted July 6, 2022 I appreciate all the good thoughts gentlemen. I went with the double-whammy of sticking down 0.8mm dense acoustic dampening material (similar to Dynamat) and wrapped as far into the crevices where the inner and outer panels meet as possible. Then I cut-to-fit a large carpet remnant roll that matches the interior fawn color. I'm about 85% complete but the sound improvement is already +300%. Rattle is gone and the bass is tighter and more acoustically pleasing overall. I also love the look. Next up is to order some extra vinyl from Clark's Corvair to wrap the subwoofer enclosure. I'll try to update with some photos here soon. Link to comment Share on other sites More sharing options...
DShoes Posted September 11, 2022 Author Share Posted September 11, 2022 Progress pics. Trying to wrap the cardboard inserts with leftover vinyl from the interior and finding it harder than imagined. Will probably shift to doing the sub enclosure so I can feel better about myself. Link to comment Share on other sites More sharing options...
gungeey Posted September 11, 2022 Share Posted September 11, 2022 Where's the amp located? Speaker location? Maybe we can start a Hi End Stereo thread 😆 Link to comment Share on other sites More sharing options...
DShoes Posted September 14, 2022 Author Share Posted September 14, 2022 (edited) Gungeey, I’m all for that thread! Amp is right behind the back seat where the spare tire used to be. I re-did the back shelf and put 2 x 9” oval mids from Morel there. Both doors got custom enclosures for some 6” Morels. Tweeter (also Morel) replaced the OEM speaker under the dash. Retrosound face allows for Bluetooth, etc. Incredibly happy with the outcome acoustically and visually. Edited September 14, 2022 by DShoes Photos posting upside down? (see edit history) 1 Link to comment Share on other sites More sharing options...
gungeey Posted September 14, 2022 Share Posted September 14, 2022 Nice! So where does the spare tire go? I will start a new thread for *Aftermarket Stereo Installs*. Why don't you repeat your last post there so others can research in the future. Steve Link to comment Share on other sites More sharing options...
DShoes Posted September 14, 2022 Author Share Posted September 14, 2022 Spare doesn’t go. It stays at home. I figured I didn’t need the extra weight and would call AAA if need be. Sounds good on the new thread. Maybe I can even get photos right side up! So frustrating… Link to comment Share on other sites More sharing options...
drhach Posted September 15, 2022 Share Posted September 15, 2022 The curmudgeon in me says "turn down that racket! Nobody wants to hear your stereo." That would be the cheapest and easiest solution. Link to comment Share on other sites More sharing options...
DShoes Posted September 15, 2022 Author Share Posted September 15, 2022 Curmudgeon: with a quality stereo system and quality insulation, you won’t hear anything. Perfect for yelling at those kids to get off your lawn. 😉 Link to comment Share on other sites More sharing options...
drhach Posted September 15, 2022 Share Posted September 15, 2022 Link to comment Share on other sites More sharing options...
RIVNIK Posted September 16, 2022 Share Posted September 16, 2022 what I want to know is where you got those 2 brand new looking cardboard clips on the pass. side? Link to comment Share on other sites More sharing options...
DShoes Posted September 16, 2022 Author Share Posted September 16, 2022 Rivnik, those are the originals clips (as far as I know - I am 2nd owner). Link to comment Share on other sites More sharing options...
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