Blog
Notes on track day logging, telemetry imports and getting more out of your sessions.
Live telemetry overlay on your onboard video, no render first
Play a GoPro file from disk and see speed, lap time, delta, track map and G drawn on it live — no render, nothing saved. When one clip is worth publishing, one button renders exactly that.
Talk to your onboard: turning what you say on track into lap notes
ApexLog's Notes from audio finds the speech in a GoPro file, transcribes it in the EU and lists what you said at the moment you said it. You review, then save. Here is how it works and where it falls short.
Watch your GoPro onboard straight from the SD card, synced to telemetry
Review a track day onboard against your telemetry without uploading it anywhere — play the file from disk, or link the SD card folder and let each session find its own clips.
GoPro telemetry overlay for track days, rendered in your browser
Turn a GoPro onboard into an overlay video with speed, lap time, delta, track map and OBD data — synced from the camera's own GPS, rendered on your computer, nothing uploaded.
FWD vs AWD on the same track: Golf GTI Edition 50 vs Golf R at Silesia Ring
Two Golfs, one track, one amateur driver, full telemetry on both. Lap times, tire pressures, wear and OBD data from the GTI Edition 50's first track day — next to a season of Golf R laps at Silesia Ring.
Turning your track data into an AI race engineer
Most AI telemetry tools read one lap. Connect an assistant to your whole logbook — sessions, setups, tire wear, costs — and ask the questions a single trace can't answer.
Syncing onboard video with track telemetry, in the browser
How to line up a YouTube onboard with RaceChrono or RaceBox telemetry — one sync point, then every lap plays with the track map and speed trace following the footage.
Reading OBD data from a track day: RPM, fuel and temperatures
How to record OBD-II channels alongside GPS in RaceChrono — what hardware works, which channels you get, and what a season logbook does with them after the import.
RaceBox Mini for track days: getting more from your data
What the RaceBox Mini records on track, how to export the CSV, what its cloud already shows, and how to keep a season of sessions with your setups.
Track day tire pressures: cold vs hot, and how to actually dial them in
Why hot pressure is the number that matters, how much a tire builds cold to hot (typically 3–6 psi), starting psi by tire type, and a loop to dial it in.
What a track day season costs — and the one number worth tracking
Nobody agrees what a track day costs because everyone measures it differently. The fix isn't a bigger spreadsheet — it's one normalised number: cost per lap.
What to do with your RaceChrono data after the session
RaceChrono .rcz vs CSV v3 export, explained: when to use each, what they actually contain, and how one session's data becomes a season-long logbook.
How to keep a track day logbook (without spreadsheets)
A plain-English guide to a track day log book: what to capture per session, why spreadsheets break around session 8, and why a digital track day logbook app holds a whole season that Notes, Sheets and RaceChrono can't.