Could've been a 2nd gear pull. I honestly don't know what caused the graph to look the way it does.
No worries, check out a thread I posted a while ago with my comp g if you really want to see a funky graph. It's in the kills/dyno section. Knock everywhere. The end of the run looks like mountains.
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Comp G. E85, 2.8, Headers, Tune, Intake, S1X, 105# springs, 60 # injectors, 255 walbro,etc.