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So... you say your a wrench ?

Discussion in 'Technical Chat' started by concrete jedi, Jan 13, 2009.

  1. Jan 13, 2009 at 1:54 PM
    #1
    concrete jedi

    concrete jedi [OP] Well-Known Member

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    My question is where does the engine produce torque, the bore or the stroke ?
     
  2. Jan 13, 2009 at 2:21 PM
    #2
    TicTacOma

    TicTacOma UnderWater Monopoly Champion

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    Ahhhhh.........Chris....Chris to the service desk please...Chris to the service desk!
     
  3. Jan 13, 2009 at 2:25 PM
    #3
    NetMonkey

    NetMonkey Well-Known Member

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    generally from the length of the stroke.

    EDIT:
    man... thats a setup for lots of inuendos:)
     
  4. Jan 13, 2009 at 4:29 PM
    #4
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Thor

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    There is alot more to it than just the stroke. Compression ratio, ignition timing, all play a role in developing torque.
     
  5. Jan 13, 2009 at 4:40 PM
    #5
    Khaos

    Khaos Well-Known Member

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  6. Jan 13, 2009 at 4:42 PM
    #6
    NetMonkey

    NetMonkey Well-Known Member

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    well, yes, all those are factors in developing torque, but the original questions was to bore or stroke.
    all things being equal what will produce more torque? bore or stroke?

    and i am sure there is some threashold that too much of one or the other will reduce torque.
    that would be an interesting graph to see, however.... the various combinations of bore and stroke and then the actual torque output. (all other things on the engine being equal of course).
     
  7. Jan 13, 2009 at 4:58 PM
    #7
    TicTacOma

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    It's all in my head at the moment...
    But the bigger the hole, the bigger the pole?
     
  8. Jan 13, 2009 at 5:16 PM
    #8
    concrete jedi

    concrete jedi [OP] Well-Known Member

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    Granted, you are going to get torque through the very physics of an internal combustion engine, but is it bore you work or stroke to gain torque ?
     
  9. Jan 13, 2009 at 5:26 PM
    #9
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Thor

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    Well, the longer the stroke, the longer the duration power is applied to the crank, so the answer would be stroke. All thing being equal.
     
  10. Jan 13, 2009 at 5:32 PM
    #10
    -TRDMAN-

    -TRDMAN- ΜΟΛΩΝ ΛΑΒΕ

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    The question seems to basic to ansewer?..... to many things apply?
     
  11. Jan 13, 2009 at 5:33 PM
    #11
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Thor

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    Absolutly true!
     
  12. Jan 13, 2009 at 5:36 PM
    #12
    -TRDMAN-

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    Lol thats wat I thought...:)
     
  13. Jan 13, 2009 at 7:55 PM
    #13
    concrete jedi

    concrete jedi [OP] Well-Known Member

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    I don't understand the use of "basic" , I don't want to seem a tool but ... basic ? come on ? Oxford dictionary says "twisting or rotary force in mechanism" so no matter what the stroke was wouldn't it be determined by the amount of force generated by how large the bore is applied to the length of the crankshaft throw ?
     
  14. Jan 14, 2009 at 7:24 AM
    #14
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Thor

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    The cranckshaft "throw" is determined by the length of the stroke. Imagine a bicycle. Have a 200# guy standing on the crank. A 100mm crank is going to put less torque on the drive train than the same guy standing on a bike with a 175mm crank.
     
  15. Jan 14, 2009 at 2:35 PM
    #15
    concrete jedi

    concrete jedi [OP] Well-Known Member

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    I understand that, thank you :)
     
  16. Jan 14, 2009 at 2:51 PM
    #16
    kmok

    kmok Plastidipped ma Hootus!

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    Im lost:eek:
     
  17. Jan 14, 2009 at 3:00 PM
    #17
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Thor

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    H.P. is a mathamatical calculation of Torque. To wit: Power is torque multiplied by engine speed to produce a measurement of the engine's ability to do work over a given period of time. Horsepower is a measure of force in pounds against a distance in feet for a time period of one minute. By substituting an arbitrary lever length for the crankshaft stroke, you can calculate the distance traveled around the crank axis in one minute multiplied by rpm and known torque to arrive at the formula for horsepower.
    Because torque and rpm are divided by 5252, torque and horsepower are always equal at 5252 rpm. If you solve the equation at 5252 rpm, the rpm value cancels out, leaving horsepower equal to torque. If you plot torque and horsepower curves on a graph, the lines will always cross at 5250 rpm (rounded off). If they don't, the curve is undoubtedly bogus.
    Torque is the static measurement of how much work an engine does, while power is a measure of how fast the work is being done. Since horsepower is calculated from torque, what we are all seeking is the greatest-possible torque value over the broadest-possible rpm range. Horsepower will follow suit, and it will fall in the engine speed range dictated by the many factors that affect the torque curve.
    Are you still lost? :)
     
  18. Jan 14, 2009 at 3:54 PM
    #18
    -TRDMAN-

    -TRDMAN- ΜΟΛΩΝ ΛΑΒΕ

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    Very well put!!!!:thumbsup:
     
  19. Jan 14, 2009 at 6:59 PM
    #19
    TicTacOma

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    To wit? Did you have your cap and gown on while you typed that?
     
  20. Jan 14, 2009 at 7:01 PM
    #20
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Thor

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    Hey, I,ve been to college. :)
     
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