Technical Delegate's Report

Event: 2026 Japanese Grand Prix
From: The FIA Formula One Technical Delegate
To: The Stewards
Document: 34
Date: 27 March 2026

1. Before Free Practice 1

• Exhaust Systems: Checked against declarations for all cars.

2. During and After Free Practice 1

• General Checks: Tyre pressures, fuel flow meter calibration, fuel energy flow (instantaneous/partial), and temperatures (fuel/plenum/intake air).
• Systems Monitoring: Fuel pressure, engine cooling system pressure, and maximum turbocharger speed.
• Electronics & Software: DC sensor code, ES state of charge, ERS recharge limits, MGU-K power limits, and custom software versions.
• Samples: Fuel and engine oil samples were taken from Car 18.

3. During and After Free Practice 2

• General Checks: Repeated monitoring of tyre pressures, fuel systems, and temperatures for all cars.
• Specific Checks:
  • Car 43 was weighed.
  • Rear brakes pressure control: Checked on Cars 12, 44, 05, and 11.
  • Chassis FIA checksum and SECU software versions verified for all cars.
• Samples: Fuel and engine oil samples were taken from Car 55.

4. Conclusion

All fuel and oil analyses (FTIR spectroscopy/viscometry) confirmed consistency with approved reference samples. All checked items were found to be in conformity with the 2026 FIA Formula One Technical Regulations.

Jo Bauer
FIA Formula One Technical Delegate