Ghosty's "V" Twin

Discussion in 'A Work In Progress' started by Ghosty, Dec 22, 2016.

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  1. Dec 22, 2016 #1

    Ghosty

    Ghosty

    Ghosty

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    Hi All
    After doing the Rupnow Vertical, I have had a thought, How would a twin look. I have done some drawings at 60 & 90 deg's. The 90 one would be simpler to mark out as every thing is at 90degs to each other.
    What does every one think?

    Cheers
    Andrew

    2.jpg
     
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  2. Dec 22, 2016 #2

    kadora

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    You are right 90 deg. Twin is a bit simpler for machining but i think
    that 60deg. Twin is nicer.
    I have question is there some advantage of 60 deg. twin opposite common
    inline two cylinder engine?.
    Ghosty sorry to interupt your thread .
     
  3. Dec 22, 2016 #3

    Niels Abildgaard

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    For small engines put putting say one hour over their hole life it does not matter ,but for motobikes the question has been resolved.
    What is best ?
    A 90 degree Ducatti,
    something less Harley Davidson or a not at all old Triumpf.
    Balance IS important and best in a 90 degree V2.
     
  4. Dec 22, 2016 #4

    Charles Lamont

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    Or flat (180 deg)?
     
  5. Dec 22, 2016 #5

    Niels Abildgaard

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    An opposed 180 degree is horrible and a 360 degree flat like a BMW is more uneven in torque delivery than a V2 needing more steel in gears.
     
  6. Dec 22, 2016 #6

    charlesfitton

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    You only "need" one cam for a V...
     
  7. Dec 22, 2016 #7

    Parksy

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    Anything that produces an uneven firing pattern within the 720 degrees is good in my books. Purely from a sound perspective.
     
  8. Dec 23, 2016 #8

    Ghosty

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    Hi All,
    Done a rough layup of the cam gearing, out by about 15thou(60deg). Will have to check cad drawings.

    Cheers
    Andrew
     
  9. Dec 23, 2016 #9

    Ghosty

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    What is going on, can't upload pics.
     
  10. Dec 23, 2016 #10

    Ghosty

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    Got the pic of the timing gears to upload

    Cheers
    Andrew

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  11. Dec 23, 2016 #11

    kadora

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    In my 60 Deg. twins i have this cam gears layout.

    4 check if gears run smooth.jpg
     
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  12. Dec 24, 2016 #12

    Ghosty

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    Hi All,
    Cut the head blanks today making tinsil:). Yes, I made a left and right hand one.

    Cheers

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  13. Jan 2, 2017 #13

    Ghosty

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    Hi All,
    Happy New year all, Had places to go, people to see and other things to do over the holidays, still got some more done.
    Heads machined out, now on to the valve cages

    Cheers
    Andrew

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  14. Jan 2, 2017 #14

    Ghosty

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    Hi All,
    On to the valve cages and the valves. When fitting the valve cages I use Loctite 515 to seal them.

    Cheers
    Andrew

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  15. Jan 3, 2017 #15

    Ghosty

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    Hi All,
    Got the cylinder liners and cylinders done.

    Cheers
    Andrew

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  16. Jan 3, 2017 #16

    Brian Rupnow

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    Do you have a rich uncle who is in the brass business??---Looking good.---Brian
     
  17. Jan 3, 2017 #17

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    Simon

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    Photo #6 = someone's planning to do some bluing :thumbup:
     
  18. Jan 3, 2017 #18

    stevehuckss396

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    Nice work. She should look real nice with the brass cylinders.
     
  19. Jan 4, 2017 #19

    Herbiev

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    Looking great Ghosty. You are really moving along with this one.
     
  20. Jan 4, 2017 #20

    Ghosty

    Ghosty

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    Brian,
    Got them from my brother in law. They are left over fuel change over valve bodies(un-machined) from his fishing trawler.

    Cheers
    Andrew
     
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