What to use under carpet and in doors to deaden sound?

Getting ready to tinker with the R/T again and I need to decide on what to use for a sound deadening material without going broke. Really just want to reduce road noise and heat so Dynamat and the other big money options are out.
What do y'all use if anything?
 

Bob Heine

Oldtimer
A 2-gallon bucket of Lizard Skin sound deadener, which covers about 45 square feet, is around $160 (shipped to South Florida) from Summit. Add on the heat insulator for about $170 more and you're cool and quiet.

Dynamat Extreme at Eastwood and Summit is around $230 plus shipping for the 36-square foot bulk pack. I bought the same bulk pack -- nine 18"X32" pieces -- for $150 delivered. Ebay has low prices but if you don't like that route, several auto electronics online stores sell it for about the same price and sometimes have better deals.

I tried a couple of pieces of Dynamat Extreme on the floorboards of my '87 Corvette and it seems to help. A little hard to tell because the top is down 99% of the time I'm driving the car. I bought the larger bulk pack for the '72 Corvette for two reasons. The big block with headers makes a lot more noise and it's a coupe so even with the t-tops off it's a lot more closed in. I also chose the Dynamat over the spray-on deadeners because its foil layer might give my Corvette a little shielding for radio interference (I'm attaching ground wires from the Dynamat to the frame in several places). One of the nine pieces (and a couple of scraps from the floor) does a door in the Corvette.

Several of the forums mention Second Skin products but they seem to be about the same price as the Lizard Skin.
 

Bob Heine

Oldtimer
[QUOTE='68 Coronet R/T;6055]Thanks Bob. So it sounds like I won't be able to get the job done for under $300?[/QUOTE]
You could probably do the car with one bulk pack -- just do the floors above the exhaust, the door panels and firewall. If it doesn't seem adequate after you get 36 square feet installed, buy the second pack.
 
A

abarli65

I personally purchased and used eDead from Elemental Design: http://www.edesignaudio.com/product_info.php?cPath=1_24&products_id=51

It is a bit different than dynamat in that the backing is a thin vinyl material instead of aluminum. It does not countour that well, but in a recent article in Mustang Monthly, they only put the butyl backed matting in thin small strips on flat surfaces, and then covered the entire floor with a thin foam (dynaliner)... which Elemental Design also sells a much cheaper option (eDead v4 - TekLite $2 per sqft.)

The best thing!! I paid $1 per sqft. and it sticks.

Also seen a car recently done in FatMat... that is another great alternative to dynamat, and has the aluminum backing. Looks to be about $1.60 per sqft.

Back to the Mustang Monthly article... I think the logic in not covering the entire floor with butyl backed lining is that the butyl stuff really just takes out the drone and ting out of the metal and makes it more of a thud... a few strips will do that. The foam lining is what handles the actual road/engine/exaust noise.

Now I could be all wet, but it just seems logical.

Good Luck!
 

shine

Member
do a search on heat migration . you will find most of the foil back stuff will be as hot on top as bottom after a while. i use lizardskin on all the cars i build. .
 

Barry

Paint Fanatic
Staff member
The Q pads are the best thing to use for the doors, fiberglass or metal for sound deadening.
 

Barry

Paint Fanatic
Staff member
This vette is the first one I ever butchered in my life as I want a driver and being a 74 with a 454 not of real value anyway.

One of the things I did was go extreme on was the insulation, the stuff I bought has 3 or 4 different layers of material, it was very expensive but I may have enough left to do your car. I'm sleeping at the plant tonight and Thursday night so if you are in no hurry, I can post a picture Saturday and name of stuff so you can check out.
I would cut you a deal on left over if you have an interest.

I will say this, 454's were noisy and hot inside to the point the air conditioner was totally useless but this car is a quite as any new car and heat is not even an issue.
 
Sounds great Barry. Feel free to email me directly with the information and price. I am looking at a built 440 in a car that doesn't have A/C living in Arizona.
 
T

tcsauto

Well Barry`s secretary from the new ad must be working late the next two nights.
 
Barryk;6169 said:
This vette is the first one I ever butchered in my life as I want a driver and being a 74 with a 454 not of real value anyway.

One of the things I did was go extreme on was the insulation, the stuff I bought has 3 or 4 different layers of material, it was very expensive but I may have enough left to do your car. I'm sleeping at the plant tonight and Thursday night so if you are in no hurry, I can post a picture Saturday and name of stuff so you can check out.
I would cut you a deal on left over if you have an interest.

I will say this, 454's were noisy and hot inside to the point the air conditioner was totally useless but this car is a quite as any new car and heat is not even an issue.
I am real interested in anything that will take the road noise out of my 02 Vette.
It is like driving side a drum.
If it takes Lizard Skin, Ramm Mat, and the stuff you used compounded together an make it as quite as a Dodge Neon it will be a bargain.
This car has the worst road/rear tire noise of any car I have ever in my long life been in.
I replaced the Goodyear run flats with Michelin Pilot Sport run flats and that made a big difference, but the noise level is still far from acceptible.
The installation of sound deadener is my spring project for it. Hope to make it liveable for an August road trip.
 

Barry

Paint Fanatic
Staff member
Of all the vetes i have done in last 35 years, all 50's, 60's and a few early 70's, they all are noise machines and ride like log trucks, this one was for me and it was a learning process as i wanted it to ride like a Lincoln and be as sound proof as one because neither I or my wife enjoyed driving them.
I will say, this thing is a dream to drive and looks like it might be our route 66 car.

I will get pictures of the stuff I used and the name so you can all check out when I get home Friday night or Saturday, of all the money I spent on this car, the insulation was the best money of all. Comes in 1/2 inch thick and 1" and I used the 1" mostly and the 1/2 inch for the tight spots, doors are covered with Q pads and 1/2 " laid over the Q pads.
 
My 02 rides relativley good, even with the Z51 suspension. I do have a set of standard leafs to replace the Z51 with, another of the spring tasks.
I used a roofing product in my '87 Vette called peal and seal. It appeared to be nearly identical to Dynamat at the time. The ''87 was much quiter than the '02 but road like a haying sled,lol.
 

Bob Heine

Oldtimer
I'm with Barry. My 72 454 coupe is noisy and hot. Once I get Dynamat Extreme on everything inside, it's getting a layer of insulation, then carpet underlayment, carpet and maybe some mats. Earplugs and a coolsuit may follow.

My first Corvette was a 69 convertible 427ci 390hp 4-speed with air and power everything. Had to run the air even with the top down because the foot wells got so hot the hair on my calves would curl. Could barely hear myself think on the highway. I finally fixed the heat and noise problem. Need a bigger buffer...69 Corvette.jpg
 
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