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I believe the stock turbo is maxed out on 93. I only plan on tuning this car on 93 because E85 stations are limited where I live. I am still running the stock clutch, which conveniently also tops out around this power level.
The car drives just as well as it did when it was stock. Power delivery is smooth throughout the entire rev range. I don't know why the dyno graph is jagged at higher rpms. The biggest difference now compared to stock is that the car feels like it's accelerating to redline, whereas before the power felt like it fell off around 5500rpm.