Engine Simulation

Discussion in 'Rocket Performance' started by Claviger, Oct 19, 2018.

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  1. Claviger

    Claviger Meh

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    I've purchased licenses for Engine Analyzer Plus and Pipemax. If anyone would like numbers run please let me know, I think I've nailed down the numbers on the Rocket 3 motor pretty well within the software and have replicated a CES+RAMAIR setup and my setup pretty closely in the software, it over predicts torque by about 4-5% percent, but the curve shapes are fairly close.

    Here's an example of the CES and my Motor, its never going to be perfect, simulation vs reality, but its not terribly far off:

    Engines.png
     
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  2. barbagris

    barbagris Mad Scientist

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    I'll say this, mate. You are obsessed.
     
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  3. Grumpy Ole Codger

    Grumpy Ole Codger Slave to the Beast

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    Now that is an interesting bit of software. Now how does it do the calculations. answers in purely lay mans or complete luddite terminology only please
     
  4. barbagris

    barbagris Mad Scientist

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    [​IMG]

    It is WINDOWS software after all.
     
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  5. WBaumgartner

    WBaumgartner .020 Over

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    I've used that same software (EAP) on Pontiac engines. As Claviger says, it is a bit optimistic but it does show how changes affect output with a fair degree of accuracy.
     
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  6. Claviger

    Claviger Meh

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    It uses a large database of math to determine outcomes, an inexpensive version of what OEMs use when designing an engine.

    Here's what I'm working towards with new cams and a plenum added, teal/red is current, blue/green is the goal. The update runs much lower cylinder pressures, so less detonation prone, easier to start, and smoother all while making more...everywhere:
    Optimal.jpg
     
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  7. Speedy

    Speedy Supercharged

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    Less cylinder pressure when? Less static compression? Cylinder pressure is horsepower so you need it. How fast it rises, where it peaks, and how fast it falls off during the power stroke is key.

    Have used Engine Analyzer Pro for a long time. It uses some simulation math, some rules of thumb, and customer feed back to help keep it real and affordable. The "real simulation software" is way more than you or I could run on even the most serious work station you or I could have if even if we could afford the software.
     
  8. BillB

    BillB Turbocharged

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    Around these parts it would be termed.....

    ' Slam eat up with with it' :laugh:

    Looking forward to future posts Rob. Always a good read when the gurus here go off an a tear :thumbsup:
     
  9. Claviger

    Claviger Meh

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    Cranking comp will fall a good bit. The 235 cranking PSI I currently have explains why 1 battery, no matter how charged, absolutely cannot spring the motor over, even with the upgraded starter. Put a little jump box on and spins over like a top.

    Found this out because the second battery had to be removed to make space for .... other things :p
     
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  10. Ishrub

    Ishrub Retired and loving it!

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    And don't forget VW and every other manufacturer know it! I bet VW et al are still amazed they got caught. The problem was of course 'A secret shared is no longer a secret!' ;):D:eek::roll::roll:
     
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