91 Octane

91 octane plus vp additive for 7 points

After O2 .98 corecction

We were running 91 octane fuel with a vp fuel additive that added 7 points of octane. The car ran 13.21 before adding the down / charge pipe and tune. After adding tune the best has been 13.35

TunerPro Engine data log recorded on 06/25/2025 12:03:54

Happy with how the car feels overall, just wondering if I could get a bit more power out of it or is my stock fuel system already a limiting factor?

**Stock Tune** States that CTS charge pipe might be culprit, car makes whining sound and not sure whether if it is from the turbo / engine area or the transmission