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  1. #1
    ph2ocraft's Avatar
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    Boyesen's new exhaust valves

    Good or bad I'm not sure. Innovative, a first and something I just have to try.
    They basically attached an arm to the crank which works exhaust valves to open and close the exhaust port height.
    I heard 50% more power and 50% more torque, if so WOW!!!!
    I had a few questions, such as how does it get or need lubrication for the moving parts. How does it do with individual pipes etc. Nobody home to answer the questions but man it was the coolest thing at Havasu this weekend.
    Well the trippple BRP engine in the stand up was pretty impressive.
    Did I mention the system was installed on a Polaris twin engine??


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Does Boyeson have a name for this technology?
    Do you have any further info, or web links?

    Boyesen's web site doesn't mention anything, as far as I can see.

  3. #3
    ph2ocraft's Avatar
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    Nothing other than the flyer in my hand and a few pictures that don't show anything.
    It just states it's the next generation 2 stroke technology.

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by ph2ocraft View Post
    Nothing other than the flyer in my hand and a few pictures that don't show anything...
    Quote Originally Posted by ph2ocraft View Post
    ...They basically attached an arm to the crank which works exhaust valves to open and close the exhaust port height.
    ...the system was installed on a Polaris twin engine??
    Scan and post the flyer for us?

    Did you happen to take any photos of "the coolest thing at Havasu this weekend" ?

    Does it continually move the exhaust valves with every engine revolution?
    I am having trouble imagining how the crank gets involved

    Or does it actually close the exhaust port entirely during a portion of the stroke?

  5. #5
    Rasta Mon Condoms We Be Jammin!!!!! TxVirageTx's Avatar
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    REEDS

    there was something at xxx today on something like this a while back,its not a retro fit thing.the incoming air isn't routed into the crankcase,theres actually oil sitting in the bottom of the crancase like a 4 stroke.the intake tract is enlogated and the extra connecting rod moves a membrane up and down simulating the pulsing the piston does when it travels,think of it like adding 3 chambers to a 3 cylinder,

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by TxPro1200 View Post
    there was something at xxx today on something like this a while back...
    Link?

  7. #7
    ph2ocraft's Avatar
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    Quote Originally Posted by TxPro1200 View Post
    there was something at xxx today on something like this a while back,its not a retro fit thing.the incoming air isn't routed into the crankcase,theres actually oil sitting in the bottom of the crancase like a 4 stroke.the intake tract is enlogated and the extra connecting rod moves a membrane up and down simulating the pulsing the piston does when it travels,think of it like adding 3 chambers to a 3 cylinder,
    Sounds interesting but this system is totally on the exhuast side of the engine.

    K447, there is actually a connecting link from the front of the crank that operates the exhaust port opening. My guess is it's on some type of eccentric??

  8. #8
    Watcon's Avatar
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    I will supply a link later..

    Just returned home...... I had an excellent time, and I apologize to anybody that I didn't get to talk to... Busy, busy, busy..

    The racing was great, and there were more vendors than I have seen in 10 years! Al is real!!!

    Randy

  9. #9

    Smile

    gm has been making 2 stroke diesels with intake and exhaust valves for years (8v71 ring a bell) there is some awsome technology out there on different types of internal and external combustion engines.here is one just for grins http://www.rotoblock.com/howitworks.shtml
    >Marvin

  10. #10
    ph2ocraft's Avatar
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    Quote Originally Posted by K447 View Post
    Scan and post the flyer for us?

    Did you happen to take any photos of "the coolest thing at Havasu this weekend" ?

    Does it continually move the exhaust valves with every engine revolution?
    I am having trouble imagining how the crank gets involved

    Or does it actually close the exhaust port entirely during a portion of the stroke?
    I have to look for the flyer but

    Hello Al,
    Thank you for your inquiry.
    The Boyesen designed SCT engine is not something that we are looking to
    manufacture ourselves or to produce an aftermarket kit. However, it is
    technology that we have developed and are looking to partner with a major
    manufacturer.

    With best regards,
    Boyesen Engineering
    8 Rhoades Road
    Lenhartsville, PA 19534
    USA
    tel # 610-756-6818 / 800-441-1177
    fax # 610-756-4102
    E-mail: [email protected]
    Website: www.boyesen.com

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