Sharing my Dynamat project

[artisticent]

Hey guys,

I thought I would start sharing my progress from current to completion. To catch you all up my car runs perfectly, upgraded fuel pump, radiator and fans, fuel lines etc. Anyhow I have been hung up on the interior being done for several years. Anyone that it is fanatical about detail will know that the correct way to get the A pillars for example is to wrap the material around on to the pillar and install the windshield over the material. So I removed the old discolored windshield and am going to have all the panels reupholstered and install properly. Then the last task will be to have DMC use the jig to install the new windshield and the headliner. So in the meantime I figured I would remove all pieces and clean everything to remove old dirt and old smells and lay Dynamat down to prep for the interior install. Her are the pictures so far. I have read a couple guys doing this and the general feeling it seems is that it didnt make much of a difference. However I am really getting every nook and cranny so Im excited for the result.

[JBaker4981]

Nice work! I am slowly doing the same thing on mine however I am also going to replace the old padding with a Dyna-Pad type of material ontop of my Noico behind the rear panel and on the rear parcel shelf.

[louielouie2000]

My first DeLorean had Dynamat installed under the carpet, and my second one didn't. While I agree that the Dynamat car wasn't significantly quieter, it was definitely less "boomy" inside. The fiberglass tub on these cars almost acts as a giant bass speaker for certain impacts/resonances. For instance, after buying DeLorean #2 I noticed I could hear and especially feel every time my radiator fans kicked on and off. That's not something I ever really noticed in my first car.

[artisticent]

Nice work! I am slowly doing the same thing on mine however I am also going to replace the old padding with a Dyna-Pad type of material ontop of my Noico behind the rear panel and on the rear parcel shelf.

I will probably do that also, but I wanted the harder thinner dynamat on there first before I add anything thicker ......Honestly at this point why NOT add anything I can for sound dampening. I will also tackle wire management and replacing any clips etc

[artisticent]

My first DeLorean had Dynamat installed under the carpet, and my second one didn't. While I agree that the Dynamat car wasn't significantly quieter, it was definitely less "boomy" inside. The fiberglass tub on these cars almost acts as a giant bass speaker for certain impacts/resonances. For instance, after buying DeLorean #2 I noticed I could hear and especially feel every time my radiator fans kicked on and off. That's not something I ever really noticed in my first car.

Ive seen plenty of dynamat installs in my day and know that the majority are quite sparce in the material itself either for cost effectivness or under the impression that it doesnt need total coverage. I am leaving no surface undone. So ill hope for the best. Either way at worst case its only $500 in material and a day of my time. I hope ill be happy with the result

[CyberBill]

Definitely interested to follow this!!

My main issue with the interior isn't sound issues, but the SMELL. This thing smells like an old boat on the inside. I've heard that the foam or maybe the adhesive used to hold down the foam is the main culprit - but I'm interested to hear if you noticed a big change in the smell of the car when you ripped everything out and put down the dynamat?

[artisticent]

Definitely interested to follow this!!

My main issue with the interior isn't sound issues, but the SMELL. This thing smells like an old boat on the inside. I've heard that the foam or maybe the adhesive used to hold down the foam is the main culprit - but I'm interested to hear if you noticed a big change in the smell of the car when you ripped everything out and put down the dynamat?

The musky smell is something DMC mentioned also about the perk of doing this. I cleaned and prepped the floor with simple green and pinesol. I already noticed the difference. It would seem that the smell is a combination of old padding and the grime that gets under the upholstery. Considering Im getting a new carpet kit and all interior pieces reupholstered, I wanted the the smell to be a fresh smell and not a hint of the old musky smell. That combination reminds me of the smell of Shi-breeze lol
Ill let you guess what thats the combination of.

[FABombjoy]

The smell is almost certainly the carpet foam backing.

You have the two big pieces under the floor carpets, and the other under the parcel shelf. I've removed 2/3 and it has all but vanished.

TBH I miss the smell. But mine was still somewhat "eau de DMC" and not "musky old boat stored in a barn" LOL

[Rich_NYS]

+1 on the foam.

I've had great success eliminating the odor in my first 2 cars, will soon repeat the process for my 3rd:

I remove all the carpets except near the doors. Soak overnight in a big tub with OxyClean laundry detergent, rinse with a pressure sprayer in my driveway, and dry in the sun.

I use the same cleaning solution on the carpets near the doors, then rinse using a pressure sprayer & shop vac.

I might try a Hoover mini steam cleaner this time on the pieces left in the car....Jimmy had a good result.


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[jawn101]

I did a 100% interior Dynamat project back in 2012 and can definitely agree with what others have said: it didn't make the car quiet, by any means, but the effect of "Stuck a 20 gallon rubbermaid tub over my head and beat it with rubber mallets" was much less afterwards :)

https://www.orangeoblivion.com/gallery/_data/i/galleries/vehicles/81dmc2100/repairlog/IMG_2756-me.JPG

FWIW, and you may find the same - I had to cut away sections between the seat track mounting posts, as it was just thick enough to interfere with the seat sliding.

[jawn101]

And +100 to eliminating the foam smell. Clean it out of the carpets as best you can, but scrape away and replace this section.

https://www.orangeoblivion.com/gallery/_data/i/galleries/vehicles/81dmc2100/repairlog/IMG_2744-me.JPG

https://www.orangeoblivion.com/gallery/_data/i/galleries/vehicles/81dmc2100/repairlog/IMG_2748-me.JPG

[artisticent]

I did a 100% interior Dynamat project back in 2012 and can definitely agree with what others have said: it didn't make the car quiet, by any means, but the effect of "Stuck a 20 gallon rubbermaid tub over my head and beat it with rubber mallets" was much less afterwards :)

https://www.orangeoblivion.com/gallery/_data/i/galleries/vehicles/81dmc2100/repairlog/IMG_2756-me.JPG

FWIW, and you may find the same - I had to cut away sections between the seat track mounting posts, as it was just thick enough to interfere with the seat sliding.

Very cool, I think I suspected going in to it that it wasnt going to make the biggest difference in the world but it almost seems like it would be silly not to at this stage. Even it makes a tiny difference. I also cut out for the seat mounting just in case. Your dynamat job looks great

[artisticent]

And +100 to eliminating the foam smell. Clean it out of the carpets as best you can, but scrape away and replace this section.

https://www.orangeoblivion.com/gallery/_data/i/galleries/vehicles/81dmc2100/repairlog/IMG_2744-me.JPG

https://www.orangeoblivion.com/gallery/_data/i/galleries/vehicles/81dmc2100/repairlog/IMG_2748-me.JPG

This was definitely a messy job scrapping away the residue of this section. I laid dynamat and also considering adding on top the thicker firewall type dampening. Is that what you did?

[jawn101]

This was definitely a messy job scrapping away the residue of this section. I laid dynamat and also considering adding on top the thicker firewall type dampening. Is that what you did?

Yup! You know what made that foam removal SO easy for me was just soaking the foam down with the Dow Scrubbing Bubbles cleaner. The kind that foams up real high on contact. After about a half hour sitting, the foam and adhesive all just wiped away and it smelled great in there to boot.

I put down dynamat on the triangular section as you can see, as well as on the firewall. Then I bolted my amp to the firewall board from the other side (the wooden one, not the structural fiberglass) and put new carpet pad foam on the wooden board before re-covering it with the carpeting. I wanted to preserve some of the squooshiness.

[artisticent]

Yup! You know what made that foam removal SO easy for me was just soaking the foam down with the Dow Scrubbing Bubbles cleaner. The kind that foams up real high on contact. After about a half hour sitting, the foam and adhesive all just wiped away and it smelled great in there to boot.

I put down dynamat on the triangular section as you can see, as well as on the firewall. Then I bolted my amp to the firewall board from the other side (the wooden one, not the structural fiberglass) and put new carpet pad foam on the wooden board before re-covering it with the carpeting. I wanted to preserve some of the squooshiness.

I see your fuel shut off bottom right. Have you found that you use or need that? Also do you have a picture of your finished back panel, area behind seats?

[jawn101]

I see your fuel shut off bottom right. Have you found that you use or need that? Also do you have a picture of your finished back panel, area behind seats?

I’m not sure what you mean by fuel shutoff - do you mean the battery switch? I use it all the time, it’s a fantastic help when working on the car!

As for the parcel shelf, sure thing - this is after the total electrical compartment rebuild, the amp is installed behind the backer board, all the dynamat is in and the speakers are all replaced. I don’t keep the net installed because it’s really annoying ��

https://www.orangeoblivion.com/gallery/_data/i/galleries/vehicles/81dmc2100/repairlog/DSCN4167-me.JPG

If you’re curious what’s behind the board, here it is. I got pretty creative with this install and was really happy with the results.

https://www.orangeoblivion.com/gallery/_data/i/galleries/vehicles/81dmc2100/repairlog/DSCN4166-me.JPG

[artisticent]

I’m not sure what you mean by fuel shutoff - do you mean the battery switch? I use it all the time, it’s a fantastic help when working on the car!

As for the parcel shelf, sure thing - this is after the total electrical compartment rebuild, the amp is installed behind the backer board, all the dynamat is in and the speakers are all replaced. I don’t keep the net installed because it’s really annoying ��

https://www.orangeoblivion.com/gallery/_data/i/galleries/vehicles/81dmc2100/repairlog/DSCN4167-me.JPG

If you’re curious what’s behind the board, here it is. I got pretty creative with this install and was really happy with the results.

https://www.orangeoblivion.com/gallery/_data/i/galleries/vehicles/81dmc2100/repairlog/DSCN4166-me.JPG

Looks good man. Yeah it must be a battery kill. Good idea. You are thorough with the install. So to access your fuses for example you would remove the large grey panel, Then the black triangular piece to reveal fuses? I got the car semi taken apart so its interesting to see all the pieces for assembly.

[jawn101]

Looks good man. Yeah it must be a battery kill. Good idea. You are thorough with the install. So to access your fuses for example you would remove the large grey panel, Then the black triangular piece to reveal fuses? I got the car semi taken apart so its interesting to see all the pieces for assembly.

Ah, mines no different than anyone else’s in that regard. You just lift that thin piece of carpet that lays across the shelf, then pop out the wooden triangle that covers the electrical compartment. Easy peasy

[DeLoreanTech]

If you’re curious what’s behind the board, here it is. I got pretty creative with this install and was really happy with the results.

https://www.orangeoblivion.com/gallery/_data/i/galleries/vehicles/81dmc2100/repairlog/DSCN4166-me.JPG

Thanks for sharing this. Very clean install. How does the section with the amplifier install? How did you address air flow around the amp? I thought about doing something similar to hide the amp behind the bulkhead carpet but was concerned about not getting enough airflow around the amp (thought about installing small cooling fans).

[jawn101]

Thanks for sharing this. Very clean install. How does the section with the amplifier install? How did you address air flow around the amp? I thought about doing something similar to hide the amp behind the bulkhead carpet but was concerned about not getting enough airflow around the amp (thought about installing small cooling fans).

I deliberately bought a very expensive Class D amplifier (JBL XD400) that’s solid state and not prone to heat issues as a result to combat this. It’s not only smaller, but draws much less power and generates nearly zero heat as a result.

The board is just the stock parcel shelf back, so those wire loops at the bottom slot over the vertical black metal brackets, then the cargo net hooks secure it with screws from above.

[FABombjoy]

How did you address air flow around the amp?

I ran a 700w Kicker amp in that same spot for about 12 years with no incidences of thermal shutdown or other heat-related issues. Class D should fare even better.

[lazabby]

Keep us posted with the results. This is something I've wanted to do for years.

[artisticent]

I deliberately bought a very expensive Class D amplifier (JBL XD400) that’s solid state and not prone to heat issues as a result to combat this. It’s not only smaller, but draws much less power and generates nearly zero heat as a result.

The board is just the stock parcel shelf back, so those wire loops at the bottom slot over the vertical black metal brackets, then the cargo net hooks secure it with screws from above.

Thanks for the pictures. Looks good. Im just trying to get my car to upgraded original status before I go too crazy with car audio. I used to do car audio a long time ago before I started my home theater home automation company, I just havent decided what I want to do exactly. Considering Im installing a new carpet kit ill probably run some cable under to save myself later. RCAs and power possibly. I was almost considering a head unit and amp combo in a custom enclosure in the "coke" compartment lol. Then just bluetooth to it with my phone. Thoughts?