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  1. #1
    Join Date
    Jan 2019
    Location
    Cambridge (ish)
    Posts
    306

    Default Sound Deadening.

    Just been shopping to keep Big Red ticking over & the sound deadening material on the Brabus makes one heck of a difference to cabin noise / engine noise between it & Krteck (the other 450).

    Not having the same tyres, nor having an actual list in the worksheet of what has been done (other than billed for it as sound deadening) its hard to find out & compare what / where has been done beyond the obvious engine access hatch.

    Therefore am looking to folk as to 450 experience of how much sound drop off comes from deadening the hatch (I can take it off & weigh it to get a vague idea of quantity if it gives insight) because the two cars are chalk & cheese db wise, ..what brand should I fit for a quick fix to make a start on tweaking the sound on the basic "standard" 450 ?

    Also, any maintenance downside from removing wheel arch panels & fitting deadening materials there?

    Cheers
    Smart (450 city coupe 0.7 pulse) 2003 "vintage" 45KW / 61 HP (M160/1)
    450 0.7 Brabus "Red A" 55.2KW / 74 HP
    E.V. Owner (Nissan leaf)
    E-Biker
    17 snowboards (ish)
    Bitter drinker (not bitter)
    Cheapskate, Skateboarder,
    Old enough to know better.

  2. #2
    Join Date
    Jan 2019
    Location
    Cambridge (ish)
    Posts
    306

    Default Re: Sound Deadening.

    Having read on Smart car forum (& a post by Tolsen there) it appears the noise from the engines should be the same (which is as I thought based on design, space (voids) engine size etc.

    My locking screw is ok, the rubber sits tight on both cars but the noise on krteck is quite something.

    With not much actual knowledge & dissemination out there (but plenty of marketing) I'm going to buy 9 folded squares of the Noico Butylbased with AluFoil
    (Thickness: 80mil=0.08in=2mm)
    Sheet size: 19.5x15 inch (50x38 cm) To cover the boot engine area & down the hump (rear wheel curvature in the cabin, to see what difference that makes, I ought lift the carpets & see if the Brabus has any more than the engine cover (at least visible) ..however I do know there isn't any in the front of Big Red.

    Thus the question of how much (& where) produces what amount of noise suppression?
    Smart (450 city coupe 0.7 pulse) 2003 "vintage" 45KW / 61 HP (M160/1)
    450 0.7 Brabus "Red A" 55.2KW / 74 HP
    E.V. Owner (Nissan leaf)
    E-Biker
    17 snowboards (ish)
    Bitter drinker (not bitter)
    Cheapskate, Skateboarder,
    Old enough to know better.

  3. #3
    Join Date
    Jan 2019
    Location
    Cambridge (ish)
    Posts
    306

    Default Re: Sound Deadening. (450, but info on any vehicle for comparison appreciated)

    Changed my mind re the product, I only want to do this once, so am now looking at 4mm version from Silent Coat rather than finding one is quiet & the other is quiet-ish.

    I think the boot area is small enough to warrant it, what are opinions as to over the rear arches plastic trim voids (inside)?

    Bit the bullet & ordered the 12 sheet pack this morning in order to check out the realistic coverage on either car.

    There is a 10% discount code I can supply for anyone who is thinking of using their product via the sound deadening website (compared to the sales on ebay amazon et al).

    Have been impressed with the pre-existing (same brand) stuff on the engine hatch as we have not experienced whiffs from it (something that is often mentioned) it is butyl based not bitumen which I'm "guessing" makes the difference.

    Will grab a bottle of 151 (poundshop) de-greasant & prep the area when it arrives.
    Last edited by Mr Gus; 20th May 2020 at 10:42.
    Smart (450 city coupe 0.7 pulse) 2003 "vintage" 45KW / 61 HP (M160/1)
    450 0.7 Brabus "Red A" 55.2KW / 74 HP
    E.V. Owner (Nissan leaf)
    E-Biker
    17 snowboards (ish)
    Bitter drinker (not bitter)
    Cheapskate, Skateboarder,
    Old enough to know better.

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