how much dynamat? (2 Viewers)

[dubyehnel]

Soon I'm going to dynamat my 80. I want to do all the doors, tailgate, and floor? Anyone know about how many square feet that may be. I'm probably going to just buy rolls of dynamat off of ebay and wanted to see about how much yall think I should get?

While everything is up I'm also going to run wires for a new sound system as well.

 

[82cruiser]

I used about 40 square feet, give or take. I covered the wheel wells, bed, doors around speakers, and firewall. Great stuff and works as advertised for decreasing road noise and increasing speaker sound quality.

HTH's,
Randy

 

[Atticus]

Randy,
How much did that much dynamat weigh?

Thanks,
Jay

 

[82cruiser]

Hey Jay,

It depends upon which Dynamat products you are using.

Check out their info here http://www.dynamat.com/technical_technical.html.

Randy

 

[Atticus]

Thanks. I'll look into it.

 

[Bryan E.]

Wow Randy,

Do you mind sharing with us how much 40 sq. ft. runs, and best place to purchase it?

I'm also wondering how much quieter it is?


Thanks

 

[Sully]

You might consider checking out www.secondskinaudio.com as an alternative to dynamat. I'm going to be doing the same project real soon and I'm going to go with them as they seem to be much cheaper and most of the reviews I've read indicate that the product is comparable. Also, 40 ft seems a bit small. Just doing a rough measure (floor, firewall, doors, hatch, inside the plastic trim) I came up with around 120 sq. ft.

 

[RavenTai]

definatly look into other brands, there are many,

 

[ed97fzj80]

I used an adhesive-backed tar mat from McMaster-Carr. It looks, feels, and smells like original Dynamat, but doesn't have any pretty logos or printing on it and cost about 1/3 what Dynamat cost at the time.

 

[82cruiser]

Hey Bryan,

I can't give you a good estimate on costs as I installed the Dynamat about four years ago and do not remember exactly what it cost at the time.

Suggested retail pricing can be found through Crutchfield:
http://www.crutchfield.com/S-B8ybJEw0xsV/cgi-bin/ProdGroup.asp?g=181250

Do a search on Ebay - Lot's of deals for up to 50% off.

Depending upon how much and where you apply Dynamat the results can be dramatic. Rear wheel wells and doors probably give the most bang for the buck. Water noise from wet roads almost disappears as does much of the tire sound.

As taken from the Dynmat site:
"How much will Dynamat quiet my car?
Even a small amount of Dynamat can cause a profound noise reduction. For example, applying Dynamat to the doors of your vehicle can reduce road noise from 3-6dB!. Complete coverage of an average vehicle can reduce road noise 9, 12 even as much as 18dB."

Those are some big numbers which I'll support following installations on four vehicles: '96 Saab, '99 Suburban, '97 FZJ80, & '82 FJ40. The 40 provided the most impressive results with the truck going from amazingly loud (swampers) to just plain loud. You can go nuts and spend hundreds on this stuff, but you only need to be strategic in where you install it and the results will be very apparent.

If you have a decent stereo in the vehicle, a few $$$ of Dynamat can make it sound as if you installed new/better speakers. By 'deadening' the vehicle and the vehicle structure around the speaker locations, the speakers do not have to compete (as much) with road noise and vibrational noise transmitted through the vehicle. Doing this can make a stock stereo system sound much better and an aftermarket system sound amazing.

The last major advantage of Dynamat is its insulating qualities and its ability to reflect heat. In the 80, I placed a couple layers of Dynamat on the floor, tranny hump, and front seat on the passenger side where the floor would get very hot from the cats. Following this install, the floor only got warm to the touch. I've sinced replaced the cats with a high-flow cat and the heat problem dissapated. The insulating qualities were best noticed on the 40. The truck used to be extremely hot to wheel in when sitting and idling or running slowly for long stretches of time in the summer. The heat from the firewall and floors was wicked . After installing the Dynamat, the truck runs MUCH cooler as most of the heat is reflected downward instead of being obsorbed by the truck.

Be sure to use the correct Dynamat for what you're trying to achieve. There are many different kinds for different applications.

HTH's

Randy

 

[82cruiser]

Sully - you're correct in that 40 sq ft is on the low side. I only used Dynamat on the bed, rear wheel wells, and around each speaker enclosure. 120 sq ft seems about right for doing the entire rig.

A friend used Secondskin stuff and it seems to work as well as Dynamat for less $.

Randy

 

[Sully]

I've read that the tar/asphalt based damping materials can have a bit of a funky smell, particularly when warm. Supposedly the butyl-rubber based newer stuff eliminates this problem. Of course, if you don't mind tar smell, roofing sheeting can achieve much of the same effects at a very minimal cost.

 

[concretejungle]

I got a "trunk kit" dynamat kit, and it covered the center console, front floor boards and half of the fire wall. I think it cost about $135

 

[Chotchy]

definitely check out http://www.raamaudio.com/

Their stuff is fabulous and costs less than Dynamat. I just purchased a roll of it.

 

[NorCalSam]

Brokeback

fabulous!!!

 

[drsales]

I have covered, all doors, rear floor, rear wheel wells and rear gate door. Used about 60 sq ft. Cost with install $400. Next will be the firewall and trans.

What ever product you use it makes a great difference. You do not need to cover an area 100% to get the benefits. My doors are about 50% covered and seem to be fine.

Good luck.

 

[SunTzuMD]

Also look into some stuff called "Brown Bread". I used it when I did my 1 day old Double Cab Tacoma - I still have nightmares about that. Anyway it's awesome and was cheaper than dynomat by far.

 

[Cruiserhead05]

Anyone use this stuff.

Ebay- 100 sq. ft. for $100 bucks...

http://cgi.ebay.com/ebaymotors/100-...ewItemQQcategoryZ33697QQitemZ8058743213QQrdZ1

 

[C6H12O6]

anybody used the liquid roll on stuff? Supposed to be a little easier to apply than rolling out bubbles in DynaMat. Sounds like pretty good stuff, especially for tricky doors and the corrugated floor.

 

[joker]

i do installs and this is what i use. good stuff...

http://www.partsexpress.com/pe/pshowdetl.cfm?&DID=7&Partnumber=268-206&CFID=811117&CFTOKEN=78181762