For the baseline run, we used the stock fuel system, gas tank, and factory Jeep mechanical fuel pump. We haven't used the Innovate to tune the car, but we did use it as a safety measure in case the car was lean. At the top of the track, we were seeing 12.5:1, which is on the rich side. In theory, the best ratio is between 12.8 and 13.5 for best power. In the real world, you tune for mph.