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2026-06-08 Adelaide Street Circuit setup log

Adelaide A9 setup log

The current measured Adelaide keeper is A9: 1:12.018 best, 1:11.848 theoretical, and 232.09 km/h top-5 peak speed in the fair 5 mph SW wind comparison.

A9 Keeper

Setup changes from A8:

  • Rear P-rod length offset: 8.0 -> 7.0 mm.
  • Rear ride height: 38.2 -> 37.8 mm.
  • Front ride height stayed 17.4 mm.
  • Aero stayed 21 deg front flap / 21 deg rear upper / 12 deg rear beam.
  • Front heave stayed 80 N/mm.
  • Rear corner springs stayed 166 N/mm.
  • Rear third spring stayed 150 N/mm.
  • Differential stayed 45 coast / 80 drive, 50 Nm preload.
  • Brake bias stayed 53.5 percent.

Measured result:

  • Best lap: 1:12.018.
  • Theoretical lap: 1:11.848.
  • Top-5 peak speed: 232.09 km/h.
  • Split minima: 23.188 / 19.250 / 29.410.
  • Loaded high-speed bottoming: 5.93 percent.

A10 Rejected

Setup changes from A9:

  • Rear P-rod length offset: 7.0 -> 6.0 mm.
  • Rear ride height: 37.8 -> 37.4 mm.
  • Front ride height stayed 17.4 mm.
  • Aero, springs, diff, preload, and brake bias stayed unchanged.

Measured result:

  • Best lap: 1:12.099.
  • Theoretical lap: 1:12.063.
  • Top-5 peak speed: 231.84 km/h.
  • Split minima: 23.251 / 19.242 / 29.570.
  • Loaded high-speed bottoming: 4.78 percent.

Decision:

  • Rejected for now.
  • It reduced loaded bottoming, but lost best lap, theoretical lap, top speed, and S3 versus A9.

A11 Rejected

Setup changes from A10:

  • Front P-rod length offset: -24.0 -> -25.0 mm.
  • Front ride height: 17.4 -> 16.9 mm.
  • Rear P-rod length offset stayed 6.0 mm.
  • Rear ride height stayed 37.4 mm.
  • Aero, springs, diff, preload, and brake bias stayed unchanged.

Measured result:

  • Best lap: 1:12.097.
  • Theoretical lap: 1:12.067.
  • Top-5 peak speed: 231.66 km/h.
  • Split minima: 23.252 / 19.277 / 29.538.
  • Loaded high-speed bottoming: 7.75 percent.

Decision:

  • Rejected for now.
  • S3 improved versus A10, but speed and theoretical lap did not recover to A9.

Platform Read

  • Weather was controlled across A9, A10, and A11: 8.05 km/h SW wind, 0.0 relative humidity, and 0.0 fog.
  • Garage AeroCalculator stayed identical: 10.0 mm front ride height at speed, 15.0 mm rear ride height at speed, -0.0 drag trim, 0.2 downforce trim, -0.6 percent balance trim, 3.647:1 downforce-to-drag, and 43.2 percent aero balance.
  • Dynamic loaded rake changed from 9.61 mm in A9 to 8.93 mm in A10, then 9.81 mm in A11.
  • Lower static ride height did not automatically make the car faster. A9 is still the measured Adelaide platform window.