Engine Drivetrain 1st Gen Cooper S GNAT - The Resurrection

Discussion in 'Tuning and Performance' started by Nathan, Feb 23, 2012.

  1. Crashton

    Crashton Club Coordinator

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    Wonderful news Nathan!!! :)
     
  2. Mr. Jim

    Mr. Jim Mudshark
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  3. Redbeard

    Redbeard JCW: because fast is fun!
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    Round cylinders. What a concept. LOL! I'm happy to hear they've got it all back in round.
     
  4. minimark

    minimark Well-Known Member

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    Sounds good, can't wait to see what ya have when it's all finished!!! :cool:
     
  5. goaljnky

    goaljnky New Member

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    entirely unrelated, but did anyone ever make oval cylinders?
     
  6. Metalman

    Metalman Well-Known Member
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    #186 Metalman, Mar 28, 2012
    Last edited by a moderator: Mar 28, 2012
    [​IMG]
     
  7. Nathan

    Nathan Founder

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    Yes...

    VW developed a 2.3-liter 4-cylinder diesel engine with oval pistons (well, actually they're elliptical, not oval)

    [​IMG]

    Honda raced a bike with elliptical cylinders.

    [​IMG]

    Honda NR750, an outgrowth of the NR500 GP bike
     
  8. Minidave

    Minidave Well-Known Member
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    I believe Metalman's pic is of the Honda piston, they ran 4 of those babies in the engine! Not only did it allow better breathing via 8 valves, but better cooling because of the increased surface area.....Here's what the engine looked like....

    [​IMG]

    and the insides....

    [​IMG]

    I wonder how you bore and machine those cylinders?
     
  9. goaljnky

    goaljnky New Member

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    Cool! So how come they don't use those in cars?
     
  10. Justa Jim

    Justa Jim Well-Known Member
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    Because all you old school car guys, would think something was wrong and try and make them round. :lol:

    Jim
     
  11. ScottinBend

    ScottinBend Space Cowboy
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    There were some WWII rotary airplane engines that had oval pistons.
     
  12. Jan

    Jan Well-Known Member
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    the reason is they are too hard to machine...........only the factory was capable of doing this at great cost no less
     
  13. Dave.0

    Dave.0 Helix & RMW Powered
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    Sorry everyone for pulling the thread away from the topic. Your right it was childish, and won't happen again.

    Nathan,

    The news and pictures look great and I can't wait to see it all done and running around Fontana and the Dragon.
     
  14. Minidave

    Minidave Well-Known Member
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    Honda did this for their GP motorcycles - it's like Formula One, cost is simply not important......
     
  15. goaljnky

    goaljnky New Member

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    I see that happening back in the day. Would the new CNC machines of today not make that easier?
     
  16. Jan

    Jan Well-Known Member
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    I'm sure it would be easier than back in the day but the costs would be crazy for the average joe........rings are that much more difficult to get etc as everything is so out of the "norm"

    can it be done? sure..........would it be affordable? ..........NO
    just my .02

    they were bad mama jammers though
     
  17. Metalman

    Metalman Well-Known Member
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    With those pistons the rings sure wouldn't have a chance to rotate around and become aligned. I can't imagine how they handled piston ring growth with heat expansion. I'll bet maintaining a good seal was a huge problem with that shape.
     
  18. Justa Jim

    Justa Jim Well-Known Member
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    I could really run with a straight line like that MM..........but I won't. :D

    Jim
     
  19. Metalman

    Metalman Well-Known Member
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    #199 Metalman, Mar 29, 2012
    Last edited: Mar 29, 2012
    ...
     
  20. Justa Jim

    Justa Jim Well-Known Member
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    You have to stop doing this MM. I can hardly keep my fingers from dancing across the key board. :D

    Jim
     

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