Drag
Seven tests. One run.
Understand your attempt before treating it as a result.
You’ll need
- Usable GPS quality and an appropriate controlled driving environment.
Steps
Choose a test
Tap the live timer or choose a result card. The seven definitions remain fixed even when display units change.
Know the definitions
0–100, 60–160, 100–200 and 200–300 km/h; standing quarter mile and half mile; 100–0 km/h braking.
Read results
Review the speed and distance/braking result banks and the Details page. GPS and continuity failures mark an attempt invalid.
Keep valid bests
Only valid attempts can establish a PB. Standing-start movement is confirmed before a result is published.
If an update is interrupted
Keep the original session folder. It contains your pre-update backup and the exact release. Reconnect the same Lappy and recover that update; a newer release will not replace the interrupted target.
Recovery instructions ›Troubleshooting
No device appears
Try a known USB data cable, another USB port and a direct connection without a hub. Close other software using the serial port.
Permission was denied
Allow USB and local-folder access when prompted. If blocked previously, review this site’s browser permissions.
The backup cannot be saved
No device write is allowed until saved recovery files pass read-back. Choose a local writable folder with enough space.
The update was interrupted
Choose Recover update, select the original session directory and reconnect the same Lappy. Retry uses the exact retained package.
The screen remains dark
After Firmware verified, wait 30 seconds, unplug USB and turn Lappy on normally if needed. If it still cannot start, use the recovery guide and retain the original backup folder.