Demon V8 (multiplied 1.5)

Discussion in 'A Work In Progress' started by Foketry, Sep 24, 2019.

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  1. Sep 24, 2019 #1

    Foketry

    Foketry

    Foketry

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    I bought the drawings over 2 years ago, waiting for my retirement and waiting to learn and improve my engine model construction technique.
    Now, after building Hovell V4 and Holt 75, I try to make a more challenging project, Demon V8 x 1.5
    I decided to multiply all the dimensions 1.5 times to have a piston size close to 24/25 mm, about an inch, so as not to have parts too small to mill and turn.
     
  2. Sep 24, 2019 #2

    Foketry

    Foketry

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  3. Sep 24, 2019 #3

    Foketry

    Foketry

    Foketry

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    IMG_8223.JPG

    Note the wrong position of a hole, I'll have to close it
     
  4. Sep 24, 2019 #4

    stevehuckss396

    stevehuckss396

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    at 1.5 thats going to be pretty big. i'll be keeping an eye out.
     
  5. Sep 24, 2019 #5

    johnmcc69

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    Good stuff!
    I'll be following along.

    John
     
  6. Sep 24, 2019 #6

    Endamur

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    Me too... looking forward to your build progress. This is an engine that I am also planning to build in due course.... the 1.5x version will be very interesting. I have already modeled it in Fusion and started the CAM process. I have met Steve Huck a few times at the various shows and he has been super helpful answering any questions that I have had. Good luck with the build.
     
  7. Sep 25, 2019 #7

    sition

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    Good stuff!
     
  8. Sep 25, 2019 #8

    Foketry

    Foketry

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    Steve , Thanks for the great project, I'm not very knowledgeable about American engines, is this Demon derived from a Chevrolet engine ?

    I followed all the posts about this engine on this forum, I studied all the published photos, now I think I have the skills to build it
     
  9. Sep 25, 2019 #9

    Foketry

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  10. Sep 25, 2019 #10

    Foketry

    Foketry

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    A change from the original design, I made 2 seats for Viton oring for each cylinder to avoid water loss, one at the top of the cylinder, one at the bottom
     
  11. Sep 25, 2019 #11

    stevehuckss396

    stevehuckss396

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    It shares the Chevy arrangement and firing order. Mostly because I know it by memory and that makes working on it easier for me.
     
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  12. Sep 27, 2019 #12

    Foketry

    Foketry

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    oring locations

    IMG_8224.JPG
     
  13. Sep 27, 2019 #13

    Foketry

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    cylinder liners , all built in steel except one in cast iron to check if there are differences in compression
    What do you think about cast iron or steel for liners ??

    IMG_8967.JPG
     
  14. Oct 1, 2019 #14

    Foketry

    Foketry

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    installed OR in position
    IMG_8970.JPG
     
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  15. Oct 1, 2019 #15

    Foketry

    Foketry

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    milling of the head-supporting surface



    IMG_8973.JPG
     
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  16. Oct 1, 2019 #16

    Foketry

    Foketry

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    lapping of cylinder liners, once positioned in their seat , to ensure cylindricity and roundness

    IMG_9111.JPG
     
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  17. Oct 1, 2019 #17

    stevehuckss396

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    Outstanding!
     
  18. Oct 4, 2019 #18

    e.picler

    e.picler

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    Edi from brazil

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    Hi Foketry!
    Great work, congratulations! You are progressing fast.

    Could you post some pictures of your lapping tool and also how you used it?

    Thanks,
    Edi
     
  19. Oct 4, 2019 #19

    Foketry

    Foketry

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    094E4EAD-FEC7-45B5-AEE9-AC23F672A68A.jpeg
    I purchased this barrel laps in Ebay USA, only the brass body, I built the two steel parts myself.



    AB8B610E-5867-4432-ADA0-CB6DBB5A6062.jpeg
     
  20. Oct 4, 2019 #20

    Foketry

    Foketry

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