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Dynamat 2.0

Discussion in 'Gen 3 Prius Accessories and Modifications' started by phoenixgreg, Oct 8, 2012.

  1. phoenixgreg

    phoenixgreg Senior member

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    engerysaver: I also did the doors (all 4 but only the passenger RF is shown) in Dynamat and the sound deadening effect was much more dramatic than doing the flooring:
    Pruis door Dynamat 001.JPG
     
  2. engerysaver

    engerysaver Real Senior Member

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    The doors make lots of noise, because Toyota does not sound proof them;:( Other than a thin plastic.:mad:
    Your door looks great!!(y)
     
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  3. MarsMan

    MarsMan Junior Member

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    I'm doing the doors hopefully this weekend (need to take care of a wheel bearing first)
    I did the trunk/spare area this weekend. I used the Lowes/Home depot method with 40 mil MLV and 1/8 in foam with aluminum backing
    It has made a noticeable difference (wheel bearing going out, so I cannot tell fully yet, yes I am taking care of the bearing Auto Zone had to order one)
     

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  4. MarsMan

    MarsMan Junior Member

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    OK, took care of the right rear wheel bearing, the car is running smooth now.
    I can tell the difference in the rear sound deadening, but it only highlights the road noise from the front.
    I am doing the doors tomorrow night and will update with pics and db change.
     
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  5. cyclopathic

    cyclopathic Senior Member

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    IMHO if you are doing doors, might as well replace speakers.
     
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  6. iplug

    iplug Senior Member

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    Not sure if the Dynamat is made the same way as it was in the past. Thought I also bought the 2.0 product. However, I installed a bunch of this stuff in my 1995 Civic back in the day. After about 10 years the material had become substantially more brittle with much less sound deadening.

    Understandably many people only have their vehicles for a few years, so may not matter.
     
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  7. MarsMan

    MarsMan Junior Member

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    I have the JBL package, Im pretty happy with them now, maybe later on when I blow them out


    Yeah I'm wondering on longevity of the stuff. especially in the Los Angeles heat.
     
  8. phoenixgreg

    phoenixgreg Senior member

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    There might be some confusion here - Dynamat 2.0 was the name of my thread as I don't think there is product called this, but I could be wrong. As far as how it holds up in the heat, I'm in Phoenix and it's held up perfectly in 115 degree heat. It might soften a bit but it does not melt.

    Marsman: if you do tackle the firewall, let us know how you did it with lots of pics and instructions. I looked into it too but decided the clearance between the engine, components, etc. were too tight in that area to do it externally. Internally, it's nearly impossible as you would need to tear out all of the dash, heating, AC for maybe a small improvement on road noise. What I eventually did was replace my tires with Michelin Premiers for a much quieter ride, BUT...(and here comes the "but") I lost almost 9 MPG overall since they are not a very well rated LRR tire. Still, the comfort and improved ride was worth it to me, especially in this era of cheaper gas.
     
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  9. iplug

    iplug Senior Member

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    If I recall correctly, when I installed this stuff around the mid to late 1990s there was a Dynamat "original" and a higher level product that I used. It was also butyl rubber as with Dynamite Xtreme currently sold.

    The first 5-8 years of that Civic were also spent in Los Angeles, in the even hotter (than the rest of LA) San Fernando Valley.
     
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  10. MarsMan

    MarsMan Junior Member

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    Ive been looking at the dash tear down, its nuts on the prius. Im not sure I would want to tackle that.
    I will do the doors and floors for sure.
    Im wondering how much I can get to from the bottom of the car and if it is worth while.

    I would like to do the wheel wells, did you think that was worth the effort?

    I will update with pics of the doors, my parts will be in tomorrow, probably start on it Friday night though.
     
  11. sfv41901

    sfv41901 Masta S

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    Something like this?

    [​IMG]

    [​IMG]

    VS980 4G ?
     
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  12. kenniekenken

    kenniekenken Member

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    whhhooa... what a tear down, awesome!
    just my two cents...
    i would recommend deadening that part in the photo of the "little window" as i can hear some rattling and hissing when travelling. couldn't do mine yet cos of the weather but i intend to tackle that next.
    what i'm currently on now is brushing on 2-3 layers of "spray dead" liquid sound deadener to the plastic parts like the trim inside and around the hatch, around the speaker mounts themselves and inside the center console as i would like to improve on the sound quality as well. my theory is to "stiffen up" the interior so the music would just bounce around and cancel any exterior noise. i'm hearing less of the road now and more of my music at the same volume level. this is just my opinion but it's working out for me so far :)
     
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  13. phoenixgreg

    phoenixgreg Senior member

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    wheel well muffling 012.JPG wheel well muffling 013.JPG wheel well muffling 014.JPG wheel well muffling 015.JPG Dynamat wheel wells 001.JPG Dynamat wheel wells 002.JPG Dynamat wheel wells 003.JPG Dynamat wheel wells 004.JPG Dynamat wheel wells 005.JPG sfv41901 Wow! I've been behind my dash but never saw a teardown like this. Add to that, this guy was not even near getting at the firewall on the inside. So my belief that doing sound-deadening there is nearly impossible. If someone figures out how to do it from underneath the chasis, please post pics and instructions. I've uploaded some pictures of my wheel well muffling project using dense foam rubber. It worked pretty well. Then after putting back the wheel well assemblies, I added Dynamat to them (exterior) and painted it all flat black. Again, some more improvement on the transfer noise from the road.
     
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  14. kenniekenken

    kenniekenken Member

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    One area that I'm thinking was underneath the cowling where there's a fair bit of exposed painted metal that could be treated too. Not sure on this but that's the closest one can get to the firewall without that much pain, yikes! I saw this on a tread on adding a strut bar.
    I've also read somewhere that road noise starts from the tires then is transferred to the suspension components which then makes it way through the cabin so quiet tires help a lot.
    Another addition to my refinement list is taking the side mouldings and spray under there. And one more area is the spare wheel well which I want to deaden too but there's a screw like plastic pin that I can't seem to remove. Well I got the entire winter to wait out so...
     
  15. MarsMan

    MarsMan Junior Member

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    Yeah. Im not doing that tear down.
    I dont see the benefit to do it for lack of space to apply the dampening material.

    I would however like to change all the soft green LEDs to a soft blue on the center column.
     
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  16. engerysaver

    engerysaver Real Senior Member

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    Great pictures!!:):) Good job!!(y)(y)
     
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  17. kenniekenken

    kenniekenken Member

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    hi. just wondering how you removed the shroud under the spare tire well area? I can't seem to remove that plastic screw(?) that holds it in place? you got pictures? help please?

    did this as well in the summer and then i painted a couple of layers of spray dead liquid sound deadener. I now the only sound i hear from the rear going 100kph is the hybrid battery fan.
    I mentioned this before on a previous post that i can hear quite a bit of "hiss" by the side mirrors (besides the front windshield) so removing the A pillar cover and treating around the little glass area might help. please correct me if i'm wrong... :)
     
    #37 kenniekenken, Dec 14, 2015
    Last edited by a moderator: Dec 14, 2015
  18. phoenixgreg

    phoenixgreg Senior member

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    It's been a while since I was in the spare tire area, but if I recall, once you remove the tire and jack kit, there's just a yellow styrofoam piece that lines the bottom of the well. Does it just lift out? Maybe you could upload some pictures of the area in question? Thanks.
     
  19. kenniekenken

    kenniekenken Member

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    sorry i was talking about the exterior from under the vehicle it's bare from under the shroud and there's that one screw I can't seem to figure out how it comes off. don't wanna break it with no spare.
     
  20. phoenixgreg

    phoenixgreg Senior member

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    Thanks for clarifying...when I did my spare tire area, it was from above. Maybe someone else who tried your appoach will have the info.