This didn't lead to EPC but another 5th gear pull did at higher RPM. Probably will still install LPFP as well as attempt to gap Denso plugs due to knock seen.
~70% ethanol, fully warmed up car, ECU tune was re-flashed an hour before this to clear any settings. 3rd gear to redline was not WOT but looked OK, 5th gear push on the highway hit EPC.