one thing you also have to consider is you are dyno tuning these cars for power. I did the same thing when I tuned mine but my tuner also hopped in the car and street tuned it with me making full 4th gear pulls to get the most out of it. It smoothed a lot of things out that could not be seen or done on the dyno. Additionally, why I like the Power FC is it will tell you when you go into dangerous knock and will pull timing a little so you do not go BOOM.
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