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Thread: need Quiet like a golf cart for Airboat app

  1. #1
    scottperkinsusa Guest

    Default need Quiet like a golf cart for Airboat app

    I am using a hi compression two cylinder 700 cc motorcycle engine
    reving to 6000 rpms
    on an airboat and I need to make it extremely quiet without creating
    excess back pressure and robbing power. I understand how the diffuser
    plates work but I hope not to use them much and instead maybe consider
    using two or three Supertrapp muffleres connected in series to
    reduce the noise as much as possible. I think because of the hi
    compression of this engine it is extraordinarily loud ... way louder
    than most car engines I've heard with straight pipes.

    I'd like to hear from the experts as I believe most Supertrapp products
    are for the performance crowd that usually want a loud, gnarly and
    throaty sound to impress people. I am getting special permission
    to operate on a lake that normally prohibits motorized traffic it
    I can make it super quiet like todays dealer automobiles.

    I have already designed a super large and slow turning propeller
    to eliminate that source of noise.
    ________
    buy herbalaire
    Last edited by scottperkinsusa; 01-18-2011 at 09:15 PM.

  2. #2
    bschultz Guest

    Default

    Quote Originally Posted by scottperkinsusa View Post
    I am using a hi compression two cylinder 700 cc motorcycle engine
    reving to 6000 rpms
    on an airboat and I need to make it extremely quiet without creating
    excess back pressure and robbing power. I understand how the diffuser
    plates work but I hope not to use them much and instead maybe consider
    using two or three Supertrapp muffleres connected in series to
    reduce the noise as much as possible. I think because of the hi
    compression of this engine it is extraordinarily loud ... way louder
    than most car engines I've heard with straight pipes.

    I'd like to hear from the experts as I believe most Supertrapp products
    are for the performance crowd that usually want a loud, gnarly and
    throaty sound to impress people. I am getting special permission
    to operate on a lake that normally prohibits motorized traffic it
    I can make it super quiet like todays dealer automobiles.

    I have already designed a super large and slow turning propeller
    to eliminate that source of noise.
    All of our Universal Mufflers are "end of the pipe" applications. We do not have mufflers that are capable of hooking together in "series". I would suggest going to the OEM muffler, which is most likely the quietest you will achieve.
    Last edited by bschultz; 11-08-2007 at 09:00 AM.

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