2026 Mexico City Grand Prix - Document 56

Technical Delegate's Report

During the Third Free Practice Session (P3)

The following checks were carried out on all cars:

• Tyre starting pressures and fuel pressure
• Engine cooling system logged pressure and high rev limit bands
• Fuel flow meter calibration checksum
• Instantaneous and partial load fuel energy flow
• Fuel and plenum temperatures
• Engine intake air pressure and maximum turbocharger speed
• PU and MGU-K reduction rates
• On-track ES state of charge limits and ERS recharge limits
• Maximum MGU-K power limits and speed
• Torque coordinator demands and torque control
• SECU custom software versions
• Maximum front and rear wing adjuster system transition times

Before the Qualifying Practice Session

• Gear Ratios: Confirmed for all cars to match those declared to the FIA technical delegate.
• Brake Discs: Thickness checked for all cars participating in qualifying.

During and After the Qualifying Practice Session

• Weight & Distribution: Cars weighed and weight distribution checked for numerous cars.
• Aerodynamic & Bodywork Checks: Detailed inspections (Floor, Nose, Chassis, Roll Hoop, Mirror, Sidepod, Engine Cover, Tail, Front/Rear Wings) conducted on specific cars (e.g., Car 43, Cars 01, 12, 41).
• Power Unit & Systems: Fuel pressure, cooling system pressure, rev limits, fuel flow, temperatures, intake pressure, turbo speed, power reduction rates, ES state of charge, ERS recharge limits, MGU-K power limits (Cars 81, 01, 63, 12, 03, 06, 16, 44, 23, 55, 41, 18, 14, 31, 87, 27, 05, 10, 43, 11, 77), torque sensor checks, rear brake pressure control, steering wheel, TPMS coverage, and tyre pressures.

SECU Software Versions Used During Qualifying

Conclusion: All the above items were found to be in compliance with the 2026 FIA Formula One Technical Regulations.

Jo Bauer The FIA Formula 1 Technical Delegate