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Sorry, just had a thought, these graphs, are you looking at a motive force instead of actual torque
Most rolling road type dynos mis-state torque because of the gearing that the power goes through, not just losses but you have tested in 3rd, plus a diff plus tyres.
Do the same test in 2nd and 4th and see what I mean. trying to reconcile with a proper engine dyno is pretty much futile, all you can do is take the original figure and say these are the changes, these are the benifits. That is why you need to use the same dyno with the same settings every time, it is a point of referance, nothing else
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