BMW M4 GT3 (2021)

TYRES

• Slick (Dry) — Front: 26.3 PSI / Rear: 25.8 PSI — tyre blanket temp 70°C — optimal operating window for max grip: 80–95°C (front), 75–90°C (rear); qualifying lap favors starting near top of blanket range to hit peak window within 1–2 laps

ELECTRONICS

• TC1: 3 / TC2: 1 / ABS: 4 / Engine Map: 1 (qualifying power) / Brake Bias: 58.5%

SUSPENSION

• // FRONT
• Ride Height: 53mm
• Wheel Rate FL / FR: 175000 N/m / 175000 N/m
• ARB: 6
• Brake Torque Multiplier: 100%
• Brake Bias: 58.5%
• // REAR
• Ride Height: 60mm
• Wheel Rate RL / RR: 155000 N/m / 155000 N/m
• ARB: 5
• Diff Preload: 60 Nm
• Diff Coast: 0.4
• Diff Power: 0.6

DAMPERS

AERO

• Front Splitter: 6 / Rear Wing: 7 / Brake Ducts F: 2 / Brake Ducts R: 2 — moderate-high downforce bias for Campsa/T16 stability, minimal cooling since tyre wear and long-run heat irrelevant on single lap

KEY SETUP NOTE

• Stiffen front ARB and lower front ride height slightly versus race setup to sharpen initial rotation for late-braking into T1 and La Caixa — the M4 GT3's natural understeer bias on cold qualifying tyres must be countered aggressively since there's no second lap to manage temperature build-up.

TRACK GUIDE

• T1 Elf: brake as late as possible in a straight line, trail brake deep to rotate the nose — stay committed, the M4's stable rear allows very late trail-braking here.
• T3 Renault: carry max speed through the S-complex; small, smooth inputs — this is a high-speed balance corner, lift-and-reapply kills more time than it saves.
• T10 Campsa: near-flat in quali trim with this aero setup — commit full throttle early, trust the rear wing loading; any lift costs 2-3 tenths minimum.
• T13/14 hairpin complex: sacrifice entry speed for a clean, early throttle application — traction out of this corner feeds the long run to T16, where exit speed is king onto the main straight.
• T16 New Holland: late apex, unwind the wheel progressively — maximum exit speed here is the single biggest lap time variable at Barcelona.