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Thread: What information is required to run a meaningful Engine simulation

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    Default What information is required to run a meaningful Engine simulation

    Ever wonder what a real port map looks like?
    Need one to run Dynomation Simulation

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    You have my curiosity up.

    Are you looking for port data from a sample engine?

    Just port window size data, or discharge vectors? Maybe port cross section data?

    Rob





    Sent from my SAMSUNG-SM-G900A using Tapatalk

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    Quote Originally Posted by PPRINT View Post
    You have my curiosity up.

    Are you looking for port data from a sample engine?

    Just port window size data, or discharge vectors? Maybe port cross section data?

    Rob





    Sent from my SAMSUNG-SM-G900A using Tapatalk
    LA sleeve have the port dimensions but do you need a timing map?
    I think there are some tools out there to convert port heights to timing maps once you add rod stroke data in to them.

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    Dynomation Simulation program is for 4 strokes is that what you are working with ?

    If you want info on 2 strokes port time area map in link below press "Theory" button and go to section 4. for some details on time area:

    http://www.bimotion.se/

    You might have seen this? Also 2 stroke port timing info here by Gordon Jennings page 76 in the book 86 in the scan list:

    http://www.vintagesleds.com/library/...20Handbook.pdf
    " Three may keep a secret if two of them are dead" Ben Franklin
    " ------- well Doctor what have we got a Republic or Monarchy? A Republic he replies if you can keep it"
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    There is a 2-stroke version of Dynomation sold by motionsoftware.


    Rob



    Sent from my SAMSUNG-SM-G900A using Tapatalk

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    Since Modifiedoutboard asked "
    Ever wonder what a real port map looks like? Need one to run Dynomation Simulation"
    Sounds like he needs a port time or port area map for the program? Doesn't the program do that?
    They are derivable with port measurements, crank degrees and piston position and rpm.
    " Three may keep a secret if two of them are dead" Ben Franklin
    " ------- well Doctor what have we got a Republic or Monarchy? A Republic he replies if you can keep it"
    Benjamin Franklin, 1787 Constitutional Convention, as recorded by signer James McHenry's in his diary at the Library of Congress

    Location: SW Orlando, Fl

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    I haven't seen a complete port map ever posted here and wondered if nyone really has a clue as to what one liiks like. OEMs use dynomation two-stroke to design new engines. I wrote excel spreadsheet to calculate timing heights and effective area of ports. Just wonder who has ever gone behind the liner on this forum...……..

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    Quote Originally Posted by MODIFIEDOUTBOARD View Post
    I haven't seen a complete port map ever posted here and wondered if nyone really has a clue as to what one liiks like. OEMs use dynomation two-stroke to design new engines. I wrote excel spreadsheet to calculate timing heights and effective area of ports. Just wonder who has ever gone behind the liner on this forum...……..
    I dont think there is any simulation for how efficient a port is so its just port time area

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    Quote Originally Posted by Powerabout View Post
    I dont think there is any simulation for how efficient a port is so its just port time area
    Wave Simulation 8hrs later will, Empirical Formula driven wont...……..

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    Quote Originally Posted by MODIFIEDOUTBOARD View Post
    Wave Simulation 8hrs later will, Empirical Formula driven wont...……..
    I thought you would need an airspeed to gte that to work for you?
    Issue with a 2 stroke as you know is you need to keep the air speed up not just have big ports

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