Interesting times you ran with both systems. If you take away the difference in the reaction times, it looks like faster times were on the 2.5" system. Reaction time is dead time. According to the temperature too, it was 5 degrees hotter when you ran the slower time. The cooler and denser the air into the car, the more power it will make.
I don't think this really answers the question as to what system makes more power or torque.
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