BMW M4 GT3 2022

TYRES

• Slick (Soft), Front 26.5 PSI cold, Rear 26.3 PSI cold — target hot window 26–28 PSI (optimal grip ~85–95°C core temp for GT3 slicks). No blankets assumed if session option off; expect 1 warm-up lap to bring tyres into window.

ELECTRONICS

• TC1: 3, TC2: 1, ABS: 4, Brake Bias: 54.5% front (adjustable in-cockpit ±1%), Engine Braking: medium (as fixed by BOP, no adjustment on this car)

SUSPENSION

• // FRONT
• Ride Height: 55 mm
• Wheel Rate FL / FR: 145000 N/m / 145000 N/m
• ARB: 65000 N/m
• Brake Torque Multiplier: 100%
• Brake Bias: 54.5%
• // REAR
• Ride Height: 60 mm
• Wheel Rate RL / RR: 130000 N/m / 130000 N/m
• ARB: 45000 N/m
• Diff Preload: 60 Nm
• Diff Coast: 0.4
• Diff Power: 0.65

DAMPERS

AERO

• Front Splitter: 4 (of typical 0–6 range), Rear Wing: 5 (of typical 0–8 range) — biased toward high-speed stability through Eau Rouge/Blanchimont over outright straight-line speed; brake ducts N/A on this car (fixed cooling)

KEY SETUP NOTE

• Spa's long Kemmel/Blanchimont/main straight combo rewards low drag, but the M4 GT3 needs enough rear wing to hold Eau Rouge-Raidillon flat or near-flat at max commitment — bias setup toward stability through that compression rather than chasing straight-line top speed; the lap is won in Sector 1's speed carry, not the straight.

TRACK GUIDE

• Eau Rouge-Raidillon: full commitment flat in quali trim if the car is settled on entry — don't lift, trust the aero, apex the left slightly early to unload the compression cleanly.
• Les Combes (T5): late, hard brake from very high speed — trail brake to rotate, get on power early for the run to Malmedy.
• Pouhon: a double-apex left, carry min speed high through both phases — don't overslow entry, let the car roll through on a wide arc.
• Campus/Fagnes (T12-T13) esses: precise, low-speed direction changes — minimize steering correction, prioritize a clean line over outright entry speed to protect exit onto the next straight.
• Bus Stop chicane (final corner): late braking into T19, sacrifice a fraction of entry speed for a straight exit — traction onto the main straight is worth more than the chicane entry itself.

THEORETICAL BEST LAP

• 2:18.900 — theoretical optimum from best sector splits, GT3 BoP, dry/green track, AC physics

REAL WORLD RECORD

• 2:16.928 — Robert Shwartzman, Ferrari 296 GT3, Spa 24H 2023 Qualifying (GT3 class pole)

SIM RACING RECORD

• 2:17.500