Invite-only lap timing
Lap times checked against the raw GPS.
Lapboard is a GPS lap and stage timer for club motorsport, plus a leaderboard that only ranks a time once the server has recomputed it from the timer’s own GPS log.
Open the laps portal Invite only. Ask a group admin for a code.
- 1Driver AExample car, RWD1:02.418Fastest
- 2Driver BExample car, AWD1:02.903+0.485
- 3Driver CExample car, FWD1:03.571+1.153
What Lapboard is
Three parts that work together, built for small clubs that want honest results without official timing gear.
- The timer
- A small in-car unit with a GPS receiver. You mark start, sector and finish gates once, then it times every run against them, shows how you’re tracking against your best, and logs the raw GPS data to an SD card.
- The verifier
- When you upload a lap, the server replays it from the GPS data using the same gate logic as the timer. If the numbers match and the data looks genuine, the lap is marked verified.
- The leaderboard
- Invite-only groups. Each driver’s best verified lap per track, with sector splits and the gap to the leader. Only members of a group see that group’s board.
Where it fits
Club hill climbs and sprints
Point-to-point stages on a permitted course, with split times between gates.
Track days and circuit practice
Lap times, sector deltas and a projected lap time against your best.
Motorkhanas, autocross and skid-pan days
Short timed runs on closed courses with a repeatable start and finish.
Tracking your own progress
Compare sessions and see exactly which sector you gained or lost time in.
Friendly club leaderboards
Results shared only with the groups you’re invited to, not the whole internet.
What it is not for
Not for public roads. Lapboard is for closed courses and permitted events. It must not be used to race, run speed trials or time yourself on public roads. It is not official timing, and it is not a safety device.
How a lap gets ranked
- SS1
Drive
The timer in the car records each lap against fixed gates and logs the raw GPS stream to its SD card.
- SS2
Upload
Add the SD card files on the portal. Your browser sends only each lap’s slice of the log, never your whole driving history.
- SS3
Checked
The server replays the lap from the GPS data. If the replayed time matches and the data looks real, the lap is ranked. If not, it isn’t, and you’re told why.
What “verified” means
What the check does
- Recomputes the lap and sector times from the GPS log.
- Checks the data quality: satellites, accuracy, update rate and gaps near the gates.
- Checks that speed and position agree and that the motion is physically plausible.
- Tells you why a lap wasn’t ranked.
What it can’t do
- Prove the GPS signal itself is genuine. Someone determined enough to feed the timer a fake signal could get a false lap through.
- Provide official or legally binding times. GPS timing typically has an uncertainty of around a tenth of a second, so very close times can’t truly be separated.
- Catch everything. The checks will improve, and rankings can change if a lap is later found to be invalid.
Use it safely and lawfully
- Use Lapboard only on closed courses or at events where timing is permitted. Follow the road rules and the organiser’s regulations at all times.
- Set up the timer and screen before you move. Don’t operate controls or read the screen while driving. Mount everything securely, clear of airbags and your line of sight, and check your local rules about screens visible to the driver.
- Only record and upload tracks at places you have permission to use.
- Motor sport is dangerous and can cause injury or death. You take part at your own risk. Lapboard doesn’t supervise, certify or insure any event.
See the terms of use for the full rules.
Questions
Who can join?
It is invite only. A group admin sends you an invite code, and you must be 18 or over.
Is the leaderboard public?
No. You sign in, and you only see the boards of groups you belong to.
What data does it keep?
Your account (a username and a hashed password), the timer licence you activate, your lap and sector times, and a short slice of the GPS log for each lap you upload. The privacy policy has the details and your choices.
Can I delete my data?
Yes. Email [[CONTACT_EMAIL]] and we’ll delete your account, laps and GPS slices.
How accurate is it?
Good enough to compare runs at a club event, but not official timing. See “What verified means” above.
Is it affiliated with anyone?
No. Lapboard is an independent project. It isn’t affiliated with or endorsed by any motorsport body, manufacturer or event organiser.