McLaren 650S GT3 (2015)

TYRES

• Dry compound (Slick): Front 26.8 PSI, Rear 26.3 PSI, cold set. Blanket temp 70°C. Optimal operating window for max grip: 80–95°C (tread surface), ideally sustained core temp ~85°C across all four — Monza's long straights cool the tyres between braking zones so slightly lower cold pressures help offset pressure build under heavy braking load.

ELECTRONICS

• TC1: 5, TC2: 2, ABS: 5, Engine Map: 4 (race fuel/power balance), Brake Bias: 56.5%, Brake Driver (pedal sensitivity): 80%

SUSPENSION

• // FRONT
• Ride Height: 55mm
• Wheel Rate FL / FR: 150 N/mm / 150 N/mm
• ARB: 6
• Brake Torque Multiplier: 100%
• Brake Bias: 56.5%
• // REAR
• Ride Height: 60mm
• Wheel Rate RL / RR: 155 N/mm / 155 N/mm
• ARB: 5
• Diff Preload: 60 Nm
• Diff Coast: 0.6
• Diff Power: 0.3

DAMPERS

AERO

• Front Splitter: 3, Rear Wing: 4, Brake Ducts Front: 3, Brake Ducts Rear: 3 — low-drag biased configuration prioritizing top speed on the straights while retaining enough rear wing for stability through Ascari and Parabolica.

KEY SETUP NOTE

• The 650S's front end needs slightly firmer front ARB and lower front ride height than you'd expect to get aggressive chicane rotation (Rettifilo/Roggia/Ascari) without inducing snap oversteer on the aggressive kerbs — pair this with strong coast diff lock (0.6) to keep the rear planted on trail-braking into T1 and T4, since this car's stability under late braking is the number one limiting factor to lap time here.

TRACK GUIDE

• Variante del Rettifilo (T1/2): Brake as late as possible in a straight line, release pressure progressively while turning — the 650S will rotate hard on entry if you trail-brake too aggressively on the kerb; get back to throttle early for the second apex.
• Curva Grande (T3): Taken near-flat in qualifying trim, in race trim lift slightly if tyres are past 60% life — this is a tyre-degradation corner, manage rear temps here across a stint.
• Variante della Roggia (T4/5): Similar to T1 — brake stability is key, use the inside kerb on exit but avoid unsettling the car over bumps mid-corner.
• Lesmo 1/2: Sacrifice a little Lesmo 1 entry speed for a cleaner, more stable Lesmo 2 exit — this feeds the full back straight to Ascari, so exit traction here is worth more than entry speed.
• Variante Ascari: Flat ride over kerbs is critical — small, controlled inputs; the car must stay planted through the compressions to carry speed onto the next straight.
• Parabolica: The lap-defining corner — late, stable entry, patient rotation, and full commitment to throttle from apex determines straight-line speed all the way to T1. Prioritize exit over entry speed here above all else.