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ITT: We discuss Virtual Dyno settings

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Old Jan 12, 2016 | 02:39 PM
  #21  
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brain fart
Old Jan 12, 2016 | 02:39 PM
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i'll calculate your frontal area.
Old Jan 12, 2016 | 02:39 PM
  #23  
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oh baby
Old Jan 12, 2016 | 03:03 PM
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You can adjust coefficient of drag in Virtual Dyno, you should set it to 0 and see how well it matches up.
Old Jan 12, 2016 | 03:05 PM
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yeah I was gonna say you can play with that, but I'm not sure how accurate the results will turn out. never done that. try it and report back. or just do a pull on a flat road like the rest of us humans lol
Old Jan 12, 2016 | 03:36 PM
  #26  
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Originally Posted by aidandj
Logs are from the dyno runs.




Thanks for the laugh. I needed this today.

Old Jan 12, 2016 | 04:02 PM
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That's funny. VD also uses the mass of the car. Dynojet accelerates the drum IIRC.

Use a real road pull, or better one in each direction.
Old Jan 12, 2016 | 04:41 PM
  #28  
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Old Jan 12, 2016 | 05:43 PM
  #29  
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Go to the settings and you can apply custom fields to make boost pressure plot proper, like this for my MS2.



This is one way, then back. Stock settings for a miata.

Attached Thumbnails ITT: We discuss Virtual Dyno settings-b7w3cbm.png   ITT: We discuss Virtual Dyno settings-brbmrmi.jpg  
Old Jan 12, 2016 | 06:08 PM
  #30  
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You can't set drag coef to 0.
Old Jan 12, 2016 | 06:16 PM
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ITT: aidan learns the laws of nature
Old Jan 12, 2016 | 06:17 PM
  #32  
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Originally Posted by 18psi
ITT: aidan learns the laws of nature
Old Jan 12, 2016 | 06:17 PM
  #33  
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just open up the file

and divide by zero
Old Jan 12, 2016 | 07:00 PM
  #34  
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Originally Posted by 18psi
cause the VD software calculates drag/resistance, which you don't have on a dyno
Or, more significantly, it uses the weight of the car to calculate how much work the engine is doing to accelerate the car at the rate shown in the log

Which is why the directions say to do it on a flat surface. You know, on a road...
Whether Dynojet uses a drum mass or eddy current (they make both) is irrelevant
Old Jan 12, 2016 | 07:01 PM
  #35  
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Directions are for sissies.
Old Jan 12, 2016 | 07:06 PM
  #36  
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Attached Thumbnails ITT: We discuss Virtual Dyno settings-29117126.jpg  
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