McLaren 650S GT3 (2018)

TYRES

• Dry compound (Slick Medium — standard ambient 20–26°C track temp). Cold pressures: Front 26.8 PSI, Rear 26.3 PSI. Blanket temp: 80°C. Optimal operating window for maximum grip: 80–95°C (ideal peak ~87°C) across all four tyres — monitor rears closely on long runs as Monza's low-downforce, high-throttle-exposure layout builds heat quickly through Curva Grande and Parabolica.

ELECTRONICS

• TC1: 4 (low — Monza favours minimal intervention for exit speed, McLaren 650S has strong mechanical traction)
• TC2: 3
• ABS: 5
• Engine Braking / Brake Migration: Medium-low engine braking for stability into Rettifilo/Roggia chicanes
• Brake Bias: 54.5% (race trim, moves slightly rearward from qualy 55.5% to manage front tyre deg over stint)

SUSPENSION

• // FRONT
• Ride Height: 55mm
• Wheel Rate FL / FR: 145000 N/m / 145000 N/m
• ARB: 6
• Brake Torque Multiplier: 100%
• Brake Bias: 54.5%
• // REAR
• Ride Height: 60mm
• Wheel Rate RL / RR: 135000 N/m / 135000 N/m
• ARB: 4
• Diff Preload: 60 Nm
• Diff Coast: 0.35
• Diff Power: 0.55

DAMPERS

AERO

• Front Splitter: 1 (minimum practical — reduce drag for straights)
• Rear Wing: 2
• Downforce Level: Low-drag configuration prioritising top speed on the two long straights and Parabolica exit
• Brake Ducts: Front 3, Rear 2 (moderate cooling — race stint heat management without excess drag)

KEY SETUP NOTE

• The 650S GT3 rewards a low-drag, front-biased mechanical setup at Monza — because top speed down both straights and out of Parabolica dominates laptime far more than mid-corner downforce, run the lowest wing you can control through Ascari's kerbs, and lean on front spring/ARB stiffness plus diff coast lock to force rotation into the chicanes without needing aero grip you'll pay for on the straights.

TRACK GUIDE

• Rettifilo (T1/2): Brake as late as possible in a straight line, trail slightly to rotate the nose over the first kerb — carrying too much speed onto the exit kerb will unsettle the rear for the run to Curva Grande.
• Curva Grande (T3): Committed, near-flat in high gear — trust the low-drag setup; any lift costs more time here than anywhere else on track.
• Roggia (T4/5): Same principle as T1/2 — brake in a straight line, use the stiffer front to rotate quickly, get back to power early since this feeds into Lesmo 1.
• Lesmo 1 & 2: Lesmo 1 rewards late trail-braking for rotation; Lesmo 2 is where understeer creeps in — be patient on throttle, straighten the wheel before feeding power to protect exit speed onto the back straight.
• Ascari & Parabolica: