Sound dampening rear hatch area?

[m911gt]

I currently have the 40 section of my rear seats and a rear strut tower bar in the back of my Yaris, that is it. I get a lot of road/exhaust noise while driving and I was wondering...has anyone who has removed their seats/trunk/spare tried using Dynamat or Fat Mat to dampen the sound? Impressions? Suggestions?

Thank you

[LtNoogie]

I used RAAMMat and the improvement was huge. The sound from my TRD exhaust was a bit too loud inside.

Also improved the sound of the rear speakers greatly by damping the flimsy speaker panel.

The installation looks crappy because I did it myself and I laid down little strips. The RAAMmat sticks to your hands like crazy. It sticks to rubber gloves even worse.

[m911gt]

Great, thank you very much for the pictures and info. Would you be able to recommend a place to buy some?

[kou]

looks good.

[LtNoogie]

http://www.raamaudio.com/cgi-bin/index.cgi



But read this first. Great info.

http://www.sounddeadenershowdown.com/

[cali yaris]

Awesome read, thank you!!

[IsLNdbOi]

LtNoogie, how many square feet of the stuff did you buy?

[LtNoogie]

I bought one 50 foot roll. It's 15 inches wide and gives you 62.5 sq. ft.

$118.96

I think I've used 4/5 of it. I'm saving the rest for when I take my door panels off to see if I can sound deaden the front speaker panel.

[IsLNdbOi]

I'd like to do that whole hatch / trunk area, all four of my doors, and some for the hood and engine bay.

I wonder how much weight that would add.

[1NZYaris1]

I Used 80 feet of Dyna mat extreme. as per above photo's but i have no gaps in mine at all. with none left over :biggrin:, makes a massive
differance to the noise,in the car.

[bzinn 1]

I have now done 3 cars with deadening and it is the best bang for my buck as far as a mod goes.

Stereo is way cleaner sounding,exhaust has lots less drone,road noise is almost gone.

My tC has 150feet of it,the other tC I did has 100,and the xA I just finished has about 75.

[IsLNdbOi]

So RAAMMat vs. Fatmat vs. Dynamat. What's the difference w/ the cheapest product from each and which is best / highest quality / easiest to install?

[LtNoogie]

Read the sound deadener showdown link above and then let your pocketbook decide.

[IsLNdbOi]

Looks like SeconSkin Damplifier Pro. is the way to go. It's around $290 though for 80sq. ft. of it.

[m911gt]

i'm surprised we haven't discussed this more in the past. thanks for all the help guys

[LtNoogie]

Actually, there was a large thread previously but was lost with the hack. I'm glad I was able to read it and find the material.

[m911gt]

Actually, there was a large thread previously but was lost with the hack. I'm glad I was able to read it and find the material.

Oh that's cool, I guess I just started thinking about doing this and I wasn't able to find a thread on the topic. Thanks again.

[doginmyyaris]

I know its way ghetto, but I went with pipe-insulator. It looks and feels like the name-brand matts...a closed cell foam, sticky on one side, foil on the other side. I also taped all edges with cold-weather, HVAC foil tape.
I've no way to compare this set up to any of the name-brand matts, but it made a *huge* difference! The only worry I have is if it will stay put in next summers heat.
As far as price...2 rolls insulator @ $17 and 1 roll HVAC tape @ $20.

We'll see what happens next summer!

[pennyracer]

i bught stock in RAAMMat when i did mine two layers used
http://i214.photobucket.com/albums/cc74/boydstir2291/RANDOM-INSTALLS482.jpg

[Arkhangel]

Anyone ever measure the HB and the Sedan or calculate for 1 layer of Material, what is the cars sq.ft?

[supmet]

But read this first. Great info.

http://www.sounddeadenershowdown.com/

This really is a good read for anyone considering adding sound dampening

[Black Yaris]

i bught stock in RAAMMat when i did mine two layers used
http://i214.photobucket.com/albums/cc74/boydstir2291/RANDOM-INSTALLS482.jpg

damn.... you must have added about 100lbs to your car

[pennyracer]

yes but you need it if your wanting to kill all the road noise and rattles from my sound system . there is more than 60 square feet used for the job

http://i214.photobucket.com/albums/cc74/boydstir2291/myyarisbackenclse-3r.jpg

[fuji]

Weight is a great concern. 100lb is overkill. There is a smarter way of controlling the two types of noise being generated. One is the vibration being propigated by the sheet metal. You could use a lighter weight dampener such as Spectrum by Second Skin Audio. The cool thing about this product is you can get very through coverage and do not need to add that mush weight. You can even apply it as an undercoating. Remember, the purpose of a dampener is to deaden the vibration of the metal itself.

The second method is to utilize a barrier-this reflects sound. Second skin audio makes damplifier pro which is a mass loaded vinyl. Another great alternative is made by cascade audio and is a lead barrier composite. A barrier will be needed to reflect the low frequency high energy sound waves generated by an exhaust.

The third method is an absorber, You can use this but it will not work as well as the other two in this application.

First apply the dampener. Don't go crazy, just cover about 80% with one layer if using mat or a good thin layer if using liquid. Then use one layer of barrier - in this application, lead foil composite from cascade would work great because it conforms very readily to the curvature of the area. Make sure coverage is a complete as possible. Any small breaks and sound can leak through. Then fill the remaining spaces with a good acoustic foam. I used a bunch of memory foam worked really well.

[LtNoogie]

i bught stock in RAAMMat when i did mine two layers used
http://i214.photobucket.com/albums/cc74/boydstir2291/RANDOM-INSTALLS482.jpg

:eek:

I hope you don't need to get to any of the access ports or anything under all that RAAMmat. That's why I did mine in pieces. That and because I'm lazy.

[pennyracer]

the box is fully removable and the spare and the trays with lid set right back in just like it was when it came from the dealer for when i sell the car . as far as access ports nothing there i will ever need . this might be over kill for some but you cant kill enough noise in these little cars . hell my next job is do the roof the same way . i cant wait !!

[talnlnky]

i ordered one roll of the raammat as well.. did 2 layers all over the floorboards, the side panels behind the doors (3 dr LB) and in the hatch area (not on roof). In a few places its actually 3 layers thick. I then put one layer of foam over the mat.

its much quieter.. Not as quiet as I would like... but the sound I hear now is all coming from the front. I put most of the dampener in the rear. This spring I plan on buying another roll, putting 20sq feet on each door.. and then the rest (20ish) on the firewall... I underestimated how much I should put on the firewall.

It is well worth it... For most people 1 roll (62sq ft) would be enough. I'm anal about rattles however.

I think its money well spent.

[pennyracer]

i just ordered 84sq ft of dynapad and dynaliner for more sound proofing soon as this project is done i will post a pic or two had to do as much sound proofing as i can 4 tens going to be put in a sub floor like i have built now with only 2 tens i will put my car on a truck scale when this is done to see the total weight i dont recall if the yaris liftback is 2150 stock anyone have true numbers let me know i chose to line the panels them self's for more affect if thats possible

[CTScott]

i just ordered 84sq ft of dynapad and dynaliner for more sound proofing soon as this project is done i will post a pic or two had to do as much sound proofing as i can 4 tens going to be put in a sub floor like i have built now with only 2 tens i will put my car on a truck scale when this is done to see the total weight i dont recall if the yaris liftback is 2150 stock anyone have true numbers let me know i chose to line the panels them self's for more affect if thats possible

I used 100 sq ft of FatMat in my red one (when I was swapping out the rear seat I figured it was the perfect time to do some sound proofing). I did the entire floor from front to back, the sides up the headliner and the hatch and doors.

I realized afterwards though that I need 20 ft or so more and need to do all the way up the firewall. I went as far as I could reach, but I found that I still get way too much noise from the engine bay. I think a layer of MLV on top of the fatmat would be the key for the firewall.