BMW M4 GT3

• Note: Setup values are realistic estimates based on BMW M4 GT3 GT3-class engineering norms and Le Mans Ultimate's parameter conventions for this car, calibrated for Interlagos' bumpy surface and elevation changes. Fine-tune within sim based on telemetry.

TYRES

• Michelin GT3 slick (LMU spec), front 27.5 PSI cold, rear 27.3 PSI cold. Optimal tyre operating window: 85–105°C, peak grip around 90–95°C. Blanket temp (if used): 80°C F/R. Race stint management: start slightly above target hot pressure (aim 29.0–29.5 PSI hot front, 28.5–29.0 PSI hot rear) to account for aggressive kerb use at Ferradura and Bico de Pato.

ELECTRONICS

• TC1: 4, TC2: 2, ABS: 4, Engine Braking/Brake Magic: Medium (3/5), Brake Bias: 54.5% front (adjustable -1.0/+1.0 in cockpit for late-race front tyre deg)

SUSPENSION

• // FRONT
• Ride Height: 58 mm
• Wheel Rate FL / FR: 175000 N/m / 175000 N/m
• ARB: 120 N/m
• Brake Torque Multiplier: 100%
• Brake Bias: 54.5%
• // REAR
• Ride Height: 62 mm
• Wheel Rate RL / RR: 160000 N/m / 160000 N/m
• ARB: 95 N/m
• Diff Preload: 50 Nm
• Diff Coast: 0.45
• Diff Power: 0.60

DAMPERS

AERO

• Front splitter: 4 (of 6 clicks), Rear wing: 6 (of 10), Downforce level: Medium-High, Brake ducts F/R: 4/3 (of 6) — Mergulho and Bico de Pato generate heat, but avoid overcooling for tyre temp retention over a stint.

KEY SETUP NOTE

• Interlagos' combination of heavy traction zones (Ferradura, Junção) and a bumpy, compressing surface (Mergulho, Senna S) means running the M4 GT3 slightly softer on rear ride height and wheel rate than a smooth track baseline is critical — this preserves mechanical rear grip for traction out of Junção while avoiding bottoming/porpoising through the Mergulho compression; sacrificing a small amount of high-speed stability here is worth the lap time gained on exit traction.

TRACK GUIDE

• Senna S (T1/2): Brake hard but straight-line before turn-in; aggressive trail-braking here unsettles the rear on the reversed-camber loading — get the car rotated early so you're on power through the second part of the S.
• Ferradura (T4): This uphill hairpin is the most important traction zone on the lap feeding the back straight — sacrifice ultimate entry speed for a clean, early throttle application; use the diff power lock to put power down without wheelspin.
• Bico de Pato (T9/10) & Mergulho (T11): Ride the inside kerbs hard at Bico de Pato for the chicane but respect the