Download a phone app called βHarryβs lap timerβ get the pro version itβs like $20 but it will give you actual lap times as well as it can be overlayed on GoPro footage and display the lap time, g-force, speed, etc on the video. Worth every penny. Secondly your tires is run 34-36 hot. Good start would be 28-30 stone cold before you start the day and adjust as needed