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Steve,
I suggest that you ask them for the actual numbers. Specific data amounts for
RPM points. Usually kept in 50 or 100 RPM increments. If this was on a computer as all modern dynos are, they should be able to give you a floppy disc with the data on it. They won't want to print out each run as it can run many pages.
Then find out how many points are used to make the graph. If only a few points were used, if it is done manually for instance, a lot of the ups and downs of the curve and its actual shape can be left out. Your graph has no numbers on the x axis so it is hard to tell whether this has been compressed. Also, it is obvious that engine torque and power don't suddenly jump up from zero to 90 within a short RPM range, starting at 2200 RPM.
I assume they did not start the reading until 2200 RPM and that explains the shape,
but that is a poor way to connect the dots. Instead of starting at zero the HP should have been something like 50 at 2200 and the torque nearer its max. when the plot starts. If these points were accurately presented then the curves would be entirely different.
Look a the data available from the dyno runs a I have sent you ( I did, didn't I ?)
and you will get an idea of what should be available. You should know such things as the actual temp and barometer readings, the correction factors used, STP or SAE usually. Unless you get this data it is hard to compare later runs. Going to either superflow's or dynojets website will give you a lot of info on how the dyno works. Just another thing you have to do you homework on.
John
VPD
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