Howell V4 from Italy

Discussion in 'A Work In Progress' started by Foketry, Mar 17, 2019.

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  1. May 5, 2019 #21

    Foketry

    Foketry

    Foketry

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  2. May 5, 2019 #22

    petertha

    petertha

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    Very impressive, thanks for sharing
     
  3. May 14, 2019 #23

    Foketry

    Foketry

    Foketry

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    After the connecting rods and pistons now the camshafts .
    I milled the cams in 2 + 2 pairs , heated in oven and hardened in water
    I put them in phase through the 4 axis of my DIY cnc machine, then fixed with Loctite.
     
    Last edited: May 14, 2019
  4. May 14, 2019 #24

    Foketry

    Foketry

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  5. May 16, 2019 #25

    bluejets

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    I do similar only I make allowance for and fit a 1/16" roll pin in each before cutting/grinding the cam pair just to be sure it's not going to go anywhere.
    Do the machining, remove the pin, remove and harden the cam, then polish and refit with a new pin.
    Don't trust loctite alone.
     
  6. May 16, 2019 #26

    Foketry

    Foketry

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    I agree with you, but in this case the gluing surface is a long cylinder
    I cleaned shaft and hole with acetone and I use high strength Loctite for high temperatures (620)
    In case of single cam I use roll pin
     
  7. May 16, 2019 #27

    bluejets

    bluejets

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    You can use whatever argument to justify how you do it, still the fact remains.
    As I said before, I use the same approach but use pins.
    Nice work otherwise.
     
  8. May 22, 2019 #28

    Foketry

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    The water pump, I started from impeller
     
  9. May 22, 2019 #29

    Foketry

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  10. May 22, 2019 #30

    Foketry

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    Water outlet

    IMG_6930.JPG
     
  11. May 22, 2019 #31

    Foketry

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    Cutwater
    IMG_6929.JPG

    Mounting bracket
    IMG_6933.JPG
     
  12. May 22, 2019 #32

    Foketry

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    And finally the complete water pump, already tested, some drag problems with the magnets, even a small interference prevents impeller rotation, need to leave some backslash
     
    Last edited: May 22, 2019
  13. May 22, 2019 #33

    Foketry

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  14. May 23, 2019 #34

    johnstij

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    Foketry.
    I'm just starting to build this engine so I'm following your build with great interest.
    Planning a head, where did you buy the distributor brass miter gear from?
    Ian
     
  15. May 24, 2019 #35

    Foketry

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  16. Jun 6, 2019 #36

    Foketry

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    IMG_6782.JPG EngineBlock and steel cylinder sleeve , internal diameter 24 mm
     
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  17. Jun 6, 2019 #37

    Foketry

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    IMG_6827.JPG

    Timing gear case
     
  18. Jun 6, 2019 #38

    Foketry

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    Intake manifold
    IMG_6972.JPG IMG_6971.JPG IMG_6968.JPG
     
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  19. Jun 6, 2019 #39

    Foketry

    Foketry

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    I welded to 2 square brass bars, I milled the outer contour, then I separated the 2 pieces and finally I milled the internal channels
     
  20. Jun 6, 2019 #40

    Foketry

    Foketry

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    IMG_6967.JPG
     
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