A data engineer in your passenger seat. Drop in a session and Pitwall breaks down every corner against your own optimal lap, shows exactly where you gain and lose time, and coaches the fixes, starting with the ones worth the most.
The running time gap between Lap A and Lap B along the lap. The line dips into green where Lap A is pulling ahead and climbs into red where it's falling behind. The steeper the slope, the faster time is changing. Hover or play to read the gap at any point.
The closer your dots get to the green ring, the more of the car's grip you're using. Dots on the lower edges while turning mean you are trail braking: using braking and cornering grip together.
Sync video lines the footage up with your data on a gear change or braking point, which is more precise than the start/finish line because GPS runs slightly behind. Then Watch onboard plays the video full screen with your speed, pedals, gap and corner names on it, and Play on the traces keeps the video in step.
laps are split at a start/finish line placed from GPS, then every sample is projected onto your fastest lap's path so laps line up foot by foot. When your data is from a track in the library, turns carry the circuit's official numbers: the official list is matched to the bends in your line by order, direction and size, or placed from positions other drivers saved. Each corner's segment runs from the end of the previous straight to the end of the next one. Theoretical best adds up your quickest time through every segment. Corners where a lap is unusually slow with part-throttle cruising are treated as traffic (waiting for a point-by) and left out of the optimal lap, the coaching and the consistency figure. The optimal lap adds up your fastest clean time through each corner into one lap you can compare against. Car-balance calls (understeer, oversteer) come from comparing your steering with the rotation the car actually made, calibrated to this car. Brake and throttle estimated from g-forces are marked with a hollow dot when a file has no pedal channels.