Sound proofed my doors

Discussion in 'Modifications & DIY how-to' started by goixiz, May 6, 2006.

  1. goixiz

    goixiz Active Member

    I only got the rears done (2hours each door)
    Matted both the inside and the outside (2 layers total)

    Ill do the fronts tomorrow and if i have time and left over material ill do the trunk

    here it is
    [​IMG]

    [​IMG]

    [​IMG]
     
  2. moose

    moose Infina Mooooooose!

    And how do you like the results?

    Also, where are the tweeters on a 9-2X? On the WRX they're right in front of the door handles.

    DOH, didn't think straight--rear doors, no tweeters. :)
     
  3. goixiz

    goixiz Active Member

    i like it
    I opened and closed to compare and definately a difference
    I have stock speakers so may not realize the full potential
    The door closes with a solid thump
    The results are realized more when closing the door from the inside - felt like lexus now
     
  4. moose

    moose Infina Mooooooose!

    Surprised the Saab didn't have better soundproofing than a WRX in the doors, honestly. Glad you're enjoying it.
     
  5. goixiz

    goixiz Active Member

    I am now questioning whether i should place the plastic cover i removed back on as a moisture barrier ?
     
  6. Weapon

    Weapon 90lbs of dynamite Supporting Member

    this is a good idea! i might be down for this. as for the plastic cover..it couldnt hurt by putting it back on..
     
  7. moose

    moose Infina Mooooooose!

    I left mine off. Still need to do the rear doors and trunk; might go ahead and get some Xtreme off ebay pretty soon.
     
  8. suby113

    suby113 Member

    You guys don't think that all that extra weight hinders performance? Or is it to suttle to notice?
     
  9. moose

    moose Infina Mooooooose!

    Honestly, it isn't very heavy. The Xtreme stuff is .45 lbs / square foot. I think I used around 6 sq ft for each front door, so it added a whooping 5.4 lbs. Once I do the rear doors and trunk I might've added no more than 18-20 lbs all in all, and significantly improved the sound system performance and interior comfort.
     
  10. suby113

    suby113 Member

    ok cool so do You think I should do it with my 06 STI?
     
  11. moose

    moose Infina Mooooooose!

    It's really up to you. If you're looking to silence some road noise and make the car a little tighter and more solid feeling it'll definitely help. Alex has done some STi related research and can probably share it; I think the STi has a fair amount less noise reduction than the WRX so there might be more places you need to install it in.
     
  12. suby113

    suby113 Member

    ok cool! Thanks! I suppose I'll wait to see what alex has to say.:wiggle: Milo have you done it yet?
     
  13. goixiz

    goixiz Active Member

    3.5+ hrs for the front door (each) (only did the passenger this AM)
    Its a little harder for the front. I paid a little more attention to details and i did a lot of marking and measuring before cutting. And i matted the insides of the outside skin almost entirely - took a lot more time because its hard to get a sticky tar mat into crevices without it sticking to something you dont want and hands cant get to edges

    Tip
    get $1 spatulas (dollar store)
    mark where the snap on pins (holes) are so you dont cover it
    disconnect or wires and hold downs from the door (and mark holes) before laminating
    wind down window to remove door cards and then wind it all the way up to laminate
    keep marker handy
    wear gloves (throw aways)
    replace knife tip after 5-6 cuts
    peel the backing off then readhere it so when you want to remove it in tight spots its easy to peel off
    goof off is handy when you have tar all over the place
    dont get tar on upholstery - tough to get off without stain - cover it with trash bags.

    you can take advantage of my mistakes
     
  14. Alex

    Alex Community Founder Staff Member

    Alright, so I thought I actually did post my reply, but apparently I did not. Regarding the weight issue, <10lbs is not something to be worrying about. Hell, I need to lose 10lbs. Once I do that, then I'll worry about the actual car.

    I cannot speak for Milo, but I am nearly 100% certain that he wants nothing to do with deadening, I on the other hand, am about to be all over it. Why? All of my driving now is 100% city generally with passengers, and I would like to be able to have a quieter ride around town (within reason) as well as a conversation from time to time. Also, I would like to see more out of my stereo setup.

    It is my understanding that the STi has a substantially less amount of internal sound deadedning versus the WRX. From driving both, I will say that's true. The Saabaru is considerably MORE quiet than any WRX Ive ever been in. It's also a good 200 lbs heavier, so some of that weight maybe went into quieting it up. Looking at your door Ming, the difference I see is that you have a whole lotta foam in there. The front door of my STi was merely plastic over sheet metal (jdm weight reducto!).

    What I am considering is about a 5-10lbs addition to deaden the interior and trunk. This assumes I do infact take the carpet up and do the floor boards. Nevertheless, this includes all 4 doors and the trunk interior.

    Here are some shots from a 06 WRX Wagon off Nasioc. Now, I assume the 06 STi has more sound deadening than the 04, they did give you heated seats afterall. For sake of argument, lets just say it looks a hell of a lot similar to these snaps:
    [​IMG]
    [​IMG]
    [​IMG]

    Another out of an 06 STi (how I will be doing my flooring as well)
    [​IMG]

    Allow me to quote raamaudio from their post over on NASIOC (http://forums.nasioc.com/forums/showthread.php?t=712026&page=1&pp=25),

     
  15. suby113

    suby113 Member

    cool I might do it looks like a lot of work though,Just might not be that important. We'll see I guess.:dunno
     
  16. moose

    moose Infina Mooooooose!

    The doors really aren't bad to do -- Alex can vouch for this. I think I spent 45 mins or so per door.

    The worst would probably be yanking the interior out, but even that can't be too bad. I bet you could do the entire car on a Saturday or something easily.
     
  17. miloman

    miloman Retired Admin

    i probably wont do this
     
  18. WrxCrazy

    WrxCrazy Active Member

    why not??
    btw the way an 02 works is i need this bad.. as well.. maybe we can have a group buy for a car worth of dynamat or sumthing.. :sx:
     
  19. goixiz

    goixiz Active Member

    " It's also a good 200 lbs heavier,
    wow is it really that much heavier (saabaru vs wrx)
    Are the weights you are using a wagon vs wagon
    I cant see 200# of sound deadening or any additional opition unless they are including leather seats and sunroof and other options .
     
  20. moose

    moose Infina Mooooooose!

    Around $120 shipped on ebay for 36 sq ft.
     
  21. Alex

    Alex Community Founder Staff Member

    Note, I never said that all of the weight was specifically from sound deadening. I just pulled up edmunds and here are the results (take it with a grain of salt, note the difference). Its interesting that I see the two weights now, the difference is 45lbs, which could be a multitude of things. I dont remember when I originally read the weights or the differences between the two, but these are the curb weights listed.

    2005 Saab 9-2X
    Aero 4dr Sport Wagon (2.0L 4cyl Turbo 5M)
    Curb Weight: 3210 lbs.

    2005 Subaru Impreza
    WRX AWD 4dr Sport Wagon (2.0L 4cyl Turbo 5M)
    Curb Weight: 3165 lbs.

    2006 Subaru Impreza
    WRX 4dr Wagon AWD (2.5L 4cyl Turbo 5M)
    Curb Weight: 3252 lbs.

    2006 Subaru Impreza WRX STi
    4dr Sedan AWD w/Gold-Painted Wheels (2.5L 4cyl Turbo 6M)
    Curb Weight: 3351 lbs.
     
  22. Mad Mallard

    Mad Mallard the mad mallard

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