[q] Modifying a boxer engine

Discussion in 'Classic Motorbikes' started by Adrian, Apr 19, 2011.

  1. Adrian

    Adrian Guest

    You'd need a new cam, and you'd need to figure the fuel & sparks. But at
    least the crank's doing what you want it to...

    (Or you could just remove one plug lead)
    Adrian, Apr 19, 2011
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  2. Adrian

    Ace Guest

    Fuel wouldn't be an issue - the cam just opens the valve and the fuel
    is there.
    And the plug. Why not go ght whole hog and chop the cylinder off too?
    Ace, Apr 19, 2011
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  3. Adrian

    Adrian Guest

    You're assuming a carb'd boxer.
    Why not indeed?
    Adrian, Apr 19, 2011
  4. Adrian

    Ace Guest

    Aye, I extrapolated that from 'airhead'.

    But I know nothing of them, so flip wibble.
    Ace, Apr 19, 2011
  5. Adrian

    sean_q Guest

    I've always liked single-banger motors. Like the BSA Victor 441.

    Would it be possible to modify a boxer motor like the BMW airhead
    such that the 2 cylinders' power strokes were simultaneous
    instead of alternating?

    In effect it would be equivalent to a thumper
    but better balanced for less vibes.

    sean_q, Apr 19, 2011
  6. Adrian

    Adrian Guest

    I was going with the generality rather than the specific example.
    Adrian, Apr 19, 2011
  7. Adrian

    crn Guest

    The Velocette Viceroy did that.
    Basically an LE engine modified to make a 2 stroke scooter engine.
    Only 798 were ever built so they are now rather rare.
    Another 47 engines were sold to DMW to fit in the even rarer Deemster
    and around 250 were built for use in a schools hovercraft project.
    crn, Apr 19, 2011
  8. Adrian

    TOG@Toil Guest

    BMW did it themselves, with the R25/26 series. Basically a boxer
    engine with one pot lopped off, and turned through 90 degrees so the
    remaining pot stood vertical.
    TOG@Toil, Apr 19, 2011
  9. Adrian

    Ace Guest

    Well _I_ knew that (although not the model number) - I was assuming
    the other posters would too, so it was supposed to be a little
    Ace, Apr 19, 2011
  10. Adrian

    Adrian Guest

    <has vision of triple>
    Adrian, Apr 19, 2011
  11. Adrian

    Jim Guest

    Jim, Apr 19, 2011
  12. Adrian

    TOG@Toil Guest

    Isn't it brilliant? I'd have added some sort of bach plate to protect
    the lower pots, mind.
    TOG@Toil, Apr 19, 2011
  13. Adrian

    Paul - xxx Guest

    Musically minded engine safety .. ;)
    Paul - xxx, Apr 19, 2011
  14. ^..^ Lone Wolf, Apr 19, 2011
  15. Why not a radial?
    Macabre of Auchterloonie, Apr 19, 2011
  16. Why?
    Macabre of Auchterloonie, Apr 19, 2011
  17. Adrian

    Adrian Guest

    I think that's hint-of-whoosh.
    Adrian, Apr 19, 2011
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