07 Advanced
SD logging
On-board SD, TunerStudio logs, and what to record on a pass.
5 min readUpdated 2026-08
Race Core F7 includes an on-board microSD slot. Use it. A TunerStudio USB log is only as good as the laptop remaining plugged in through a crash or a USB brown-out.
- FAT32, quality card (A1/A2, not a 15-year-old camera card). Seat it before you button the lid.
- Log rate: 20–50 Hz is plenty for fuel and spark. Trigger/composite logs are a different tool — do not confuse them.
- Fields that earn their keep on a race log: RPM, MAP, TPS, AFR, CLT, IAT, spark, VE, PW, battery, boost duty, knock retard, slip, gear, oil pressure, oil temp, ETB angle vs command.
TunerStudio logs (MLL / MSL) are what you analyse on the laptop after a session. SD logs are what you still have when the laptop was in the pit. Pull the card, copy, do not tune off the only copy.