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

  1. #11
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    Dynomation requires the input of the cross sectional area of the intake and exhaust system at various locations in the port, along with their port lenghts, the crankcase compression ratio, and the dimensional details of the engine...bore, stroke, event timing, etc.

    From there it calculates all of the flow/velocity numbers through the specified rpm ranges. As described above...all this number crunching takes a bit of time.

    The end results is information about the engine as it progresses through the rpm range.
    It is a lot of information for the user to digest and make decisions from.

    In the end it only gives you data on the parameters entered. It will not design an engine for you.

    That said, it is a very powerful tool in capable hands.

    Rob

    Sent from my SAMSUNG-SM-G900A using Tapatalk
    Thanks Powerabout thanked for this post

  2. #12
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    Quote Originally Posted by Powerabout View Post
    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
    What does "Big Ports" mean ?
    The Wave Simulation Software simulates waves in, out and thru the engine.

  3. #13
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    Quote Originally Posted by MODIFIEDOUTBOARD View Post
    What does "Big Ports" mean ?
    The Wave Simulation Software simulates waves in, out and thru the engine.
    ports with so much cross section the air speed is too slow unless doing 15,000rpm

  4. #14
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    Quote Originally Posted by Powerabout View Post
    ports with so much cross section the air speed is too slow unless doing 15,000rpm
    do you have any pictures?
    what is "so much" ?
    Prop engines turn more than 15,000rpm.....

  5. #15
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    Quote Originally Posted by MODIFIEDOUTBOARD View Post
    do you have any pictures?
    what is "so much" ?
    Prop engines turn more than 15,000rpm...…………………..
    I am talking modified production outboards, what type are you referring?

  6. #16
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    Quote Originally Posted by Powerabout View Post
    I am talking modified production outboards, what type are you referring?
    quantify
    "too wide" if you can.

  7. #17
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    Quote Originally Posted by MODIFIEDOUTBOARD View Post
    quantify
    "too wide" if you can.
    thats when you grind on a production engine then it wont get on the plane anymore

  8. #18
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    oh well guess you can't.
    I don't grind I modify to purpose driven specs in order to gain performance for a specific application.

  9. #19
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    Quote Originally Posted by MODIFIEDOUTBOARD View Post
    oh well guess you can't.
    I don't grind I modify to purpose driven specs in order to gain performance for a specific application.
    Can you find any simulation package that is based on an outboard megaphone exhaust and or the multiply cylinders into 1 type exhaust?

  10. #20
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    Quote Originally Posted by Powerabout View Post
    Can you find any simulation package that is based on an outboard megaphone exhaust and or the multiply cylinders into 1 type exhaust?
    Howard Richards RED can run a wave based simulation using DYNOMATION. As far as Crossflows go he has experience and at one time ran shop at Second Effort.
    I would go to Looper Engine since they will outperform a crossflow...…………………..

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