I just tried my P80 today with my ECU that was upgraded this winter with the new version 5.10H. And when I go from Idle to full throttle, its seems OK, BUT from about 90 000 rpm to full throttle. It BURP for 2 seconds around 100 000 rpm, is this a problem with the new version of the ecu. Is there to much fuel being pumped in, it is safe to fly. I will try to get a video and give Bob a call Monday, but I wanted to see if anyone have any clue what is happening. P80 serial# 965B the combustion chamber and bearing changed two years ago.