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Thread: Valves in Motion High RPM

  1. #1
    Registered User stkmkt1's Avatar
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    Valves in Motion High RPM

    Don't know how many of you may have already seen this on YouTube, but I thought it was kind of cool. This is a cut-away of the valve train on a S1000R where you can watch the valves operating at high speed.

    http://www.youtube.com/watch?v=VSDa-EUT3ZE
    '09 BMW 1200 GSA, 2013 BMW 700GS, 2000 Goldwing SE, '09' V Star 950, '09 Honda Rebel,
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  2. #2
    IBA #44567 Ken F's Avatar
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    Thanks for posting! That amazing to watch isn't it?
    IBA #44567
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    Mars needs women! 35634's Avatar
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    Neat. I backed away from my monitor so I didn't get hurt if it blew......
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  4. #4
    Honey Badger Semper_Fi's Avatar
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    Thanks for posting!

    It is amazing how much oil they get and the tight tolerance of the valve cover
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  5. #5
    You stupid, fix it! r11rs94's Avatar
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    Cool S-1000-RR Video

    Not sure if this is the right K-bike section. Who know there were so many. But I digress, check out this video of the new 1000cc engine.
    http://www.autoblog.com/2010/02/19/v...%28Autoblog%29
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  6. #6
    Honey Badger Semper_Fi's Avatar
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    The good news is it is in the right forum, the bad news is I need to merge with an identical posting of the same thing.

    Thanks for sharuing though :though
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    Video of new beemer's valves at 14K r0m


  8. #8
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    Video of new beemer's valves at 14K rpm


  9. #9
    2011 R1200RT ka5ysy's Avatar
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    I would love to know the story of why the engine is cut open to begin with. Looks like crash damage or something.
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  10. #10
    Honey Badger Semper_Fi's Avatar
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    3rd posting of the same movie - merging with the other 2 in Wedge
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  11. #11
    Honey Badger Semper_Fi's Avatar
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    Merging 4th iteration of same
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  12. #12
    Registered User xp8103's Avatar
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    wow
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  13. #13
    BUBBAZANETTI
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    Quote Originally Posted by some guy in youtube
    Watching those valve springs walk around the cylinder head... isn't that the definition of "valve float"?
    care to opine? in my mind, the springs spinning don't signify valve float, just centrifugal forces produced by the intake/exhaust "whirl"

  14. #14
    Rally Rat
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    Quote Originally Posted by ka5ysy View Post
    I would love to know the story of why the engine is cut open to begin with. Looks like crash damage or something.
    Didn't a BMW demo rider drop one out west within the last few months?

  15. #15
    John. jstrube's Avatar
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    Valve float is when the valve leaves the follower & "floats" open, not being under the control of the follower. As for why it spins, I couldn't see the video, if it was a slow motion vid, or full motion speed, it was removed. Watch a "spintron" test of springs & valves & you will see all sorts of monkey motion going on. I think the rotating motion has more to do with how the springs are wound & the follower's motion than any spin of gasses in the cylinder. Can't confirm what is going on though, as the vid is gone...

    Here is a spintron test just to see the harmonics in action:

    http://www.youtube.com/watch?v=i_Npz...eature=related

    This one shows "severe spring rotation at float" & lots of good stuff.

    http://www.youtube.com/watch?v=_REQ1...eature=related

    Says severe rotation caused by valve bounce...

    Also, on the cut-a-way...

    It was probably done just to demonstrate the engine motion. When in college, I created a couple of cut-a-ways, one was a turbocharger and a small engine. Both fully rotated & showed the workings. That one does look broken though, I used to paint the cut edges...

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