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Help Me Interpret this Dyno

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Old Mar 4, 2009 | 02:11 PM
  #11  
GScotty's Avatar
GScotty
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Joined: Nov 2007
Posts: 163
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From: Wash State
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I have the 103 stage II with 255 cams= 88.53 Power & 103.44 torque
My peak torque is between 3-4000 RPM then starts sliding down
sounds like you got a pretty good tune.
I also have no compression release with no problems..
 
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Old Mar 4, 2009 | 03:44 PM
  #12  
EG Ultra Classic's Avatar
EG Ultra Classic
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Joined: Dec 2007
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From: SW Iowa
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Quote Ky ace:
"they ALWAYS cross at 5252"

What does that mean here? If you take a ruler on mhud's dyno chart and read up to the torque and hp intersecting points at ~5200, then interpolate across the graph to the respective values, you see he is right at 90 for both hp and tq at 5200 RPM's. That validates the dyno run graph plots as mathematically they should be equal at 5252. The lines don't cross at ~5200r's due to the calibration marks on both the rh and lh sides of the chart. But that doesn't mean the chart is wrong. My dyno chart reads that way too. Probably with different size bikes being dynoed, these chart values may be adjusted. But regardless, you can still interpolate with a ruler all the data points.
 
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Old Mar 4, 2009 | 05:07 PM
  #13  
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ky_ace
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Originally Posted by EG Ultra Classic
Quote Ky ace:
"they ALWAYS cross at 5252"

What does that mean here? If you take a ruler on mhud's dyno chart and read up to the torque and hp intersecting points at ~5200, then interpolate across the graph to the respective values, you see he is right at 90 for both hp and tq at 5200 RPM's. That validates the dyno run graph plots as mathematically they should be equal at 5252. The lines don't cross at ~5200r's due to the calibration marks on both the rh and lh sides of the chart. But that doesn't mean the chart is wrong. My dyno chart reads that way too. Probably with different size bikes being dynoed, these chart values may be adjusted. But regardless, you can still interpolate with a ruler all the data points.
That was only in response to the reference made above about the crossing at 4400 or 4200 by different people. I was only suggesting the intersection of the curve has no influence on the "tune" of the bike. I would agree that you cannot expect the curves to intersect properly when you have different increments of measure for both curves.

BM
 
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