Help on issues you run into with LapTimer; in case you have a question on how to use LapTimer, use the forum "Using LapTimer" instead
Yes, your RPM is ahead while IMU and GPS look sound. I suggest to decrease the OBD Sensor Delay by 0.5 seconds in LapTimer's Expert Setting. This will result in a better alignment for your next recordings. Existing recordings cannot be adjusted by sensor. You can adjust the sync for all sensor sources (compared to video) as described in viewtopic.php?f=39&t=4940. This allows to get OBD in line, but you will lose the sync for IMU and GPS when doing so. So I suggest to focus on the next race, the video is great.