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  1. #1

    Default Sound dampening for engine compartment

    I saw one older post on sound dampening and was wondering if anybody has tried one form of sound insulation in their engine compartment on a later model year Moomba? If yes, how did it work? What product did you use? Was it worth it in the end? For reference I have 19 Moomba Max and we are between 3700 and 4000 rpm at surf speeds which means there is substantial engine noise.

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  2. #2
    Join Date
    Jan 2017
    Location
    Katy, TX
    Posts
    1,633

    Default

    I have a '17 Craz....I was on planning on using Dynamat but it's kinda pricey. Killmat had excellent reviews and way more affordable.

    I lined underneath the helm first, my XXX sub opened up some rattles

    I also lined the underside of my engine storage tray and the backside of the v-drive hump.

    IMO the sound deadening plus my surf pipe made a noticeable difference in attenuation of engine noise.



    Sent from my Note 9 using Tapatalk
    2017 Moomba Craz Surf Edition
    Flow 2.0 Surf System w/ AutoWake™
    5,600 Lbs Ballast - Enzos + Lead + Sumo
    Wet Sounds REV10s + REVO12-XXX

  3. #3

    Default

    Good to know about killmat. I hadn't considered a surf pipe either. I always thought the noise was primarily from the engine compartment. Thank you! What surf pipe did you use?

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  4. #4
    Join Date
    Jan 2017
    Location
    Katy, TX
    Posts
    1,633

    Default

    I have the OEM surfpipe.

    It wasn't an option in '17 so I've heard the Raptor motor with and without it.

    IMHO it's one of the best stereo upgrades for it's price and I think most of the kinks have been worked out by now.

    The first few years of parts had issues with weld cracks and broken bolts but that's also why I went OEM vs FAE so I wouldn't have warranty hassles.



    Sent from my Note 9 using Tapatalk
    2017 Moomba Craz Surf Edition
    Flow 2.0 Surf System w/ AutoWake™
    5,600 Lbs Ballast - Enzos + Lead + Sumo
    Wet Sounds REV10s + REVO12-XXX

  5. #5
    Join Date
    Jun 2020
    Location
    Reno, NV
    Posts
    475

    Default

    Quote Originally Posted by RC_Hinojosa View Post
    I have a '17 Craz....I was on planning on using Dynamat but it's kinda pricey. Killmat had excellent reviews and way more affordable.

    I lined underneath the helm first, my XXX sub opened up some rattles

    I also lined the underside of my engine storage tray and the backside of the v-drive hump.

    IMO the sound deadening plus my surf pipe made a noticeable difference in attenuation of engine noise.



    Sent from my Note 9 using Tapatalk

    RC, did you have to use a heat gun to apply, and how was the adhesion? Reading some of the reviews it sounds like many buyers were unimpressed with the adhesion.

    I’m considering adding some to the transmission cover on my SA, as it produces quite a bit of sound at idle.

    Have any Supra owners added sound insulation? Where did you put it and did it have an appreciable effect?
    2020 SA 450 Wife calls it White Cloud. Said it makes her feel "Classy"
    2017 Sanger V215sx. We call it Viagra because it's the little blue pill that gets everyone up (Sold)

  6. #6
    Join Date
    Nov 2016
    Location
    Knoxville, TN
    Posts
    1,100

    Default

    Quote Originally Posted by cwfehr View Post
    I saw one older post on sound dampening and was wondering if anybody has tried one form of sound insulation in their engine compartment on a later model year Moomba? If yes, how did it work? What product did you use? Was it worth it in the end? For reference I have 19 Moomba Max and we are between 3700 and 4000 rpm at surf speeds which means there is substantial engine noise.

    Sent from my SM-G973W using Tapatalk
    I have used the cheap amazon peel and stick sound matt on my last 2 boats. I lined the engine divider panels, the firewall behind the rear seats and all the transmission area. A lot of what you hear is transmission whine, the matt alleviated a lot of that. And combined with surf pipe, it is now fairly quite.
    2018 Supra SA400 aka The Ron Burgandy
    2011 Sea-Doo Wake 155
    2015 Mojo Surf, sold...2013 Axis A22 Recon Edition, sold...2010 Axis A22, sold...2007 Maxum 1800sr3, sold

  7. #7
    Join Date
    Jan 2017
    Location
    Katy, TX
    Posts
    1,633

    Default

    Quote Originally Posted by 2in2out View Post
    RC, did you have to use a heat gun to apply, and how was the adhesion? Reading some of the reviews it sounds like many buyers were unimpressed with the adhesion.

    I’m considering adding some to the transmission cover on my SA, as it produces quite a bit of sound at idle.

    Have any Supra owners added sound insulation? Where did you put it and did it have an appreciable effect?
    I did not need a heat gun to apply. Adhesion is like tar paper (at least in TX)....it ain't going anywhere.


    Sent from my Note 9 using Tapatalk
    2017 Moomba Craz Surf Edition
    Flow 2.0 Surf System w/ AutoWake™
    5,600 Lbs Ballast - Enzos + Lead + Sumo
    Wet Sounds REV10s + REVO12-XXX

  8. #8

    Default

    Great info. Ty

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  9. #9
    Join Date
    Aug 2011
    Posts
    2,481

    Default

    Quote Originally Posted by cwfehr View Post
    Great info. Ty

    Sent from my SM-G973W using Tapatalk
    I dynomated the front engine wall with mats and foam, it helps a little but probably not worth the effort. The raptor is freaking loud.
    http://www.instgram.com/jlyons30
    2002 Moomba Mobius LSV - Sold
    2006 Moomba Mobius LSV - Sold
    2017 Moomba Craz - Enzos, Lead

  10. #10
    Join Date
    Nov 2016
    Location
    Knoxville, TN
    Posts
    1,100

    Default

    Quote Originally Posted by parrothd View Post
    I dynomated the front engine wall with mats and foam, it helps a little but probably not worth the effort. The raptor is freaking loud.
    Use the matt on the transmission tunnel, that will help a lot.
    2018 Supra SA400 aka The Ron Burgandy
    2011 Sea-Doo Wake 155
    2015 Mojo Surf, sold...2013 Axis A22 Recon Edition, sold...2010 Axis A22, sold...2007 Maxum 1800sr3, sold

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