BMW M4 GT3 (2021)

TYRES

• Dry compound (slick), Front 27.0 PSI / Rear 26.8 PSI cold.
• Note: reference lap's 28.2/27.9 PSI are hot pressures from a likely warmer/unknown-grip session — setting cold base at 27.0F/26.8R should climb into the 27.5–28.0 PSI optimal hot window given 30°C air / 38°C track.
• Optimal tyre operating temp for max grip: 85–95°C (core), ideally 90°C all four corners evenly.

ELECTRONICS

• TC1: 4
• TC2: 0
• ABS: 4
• Engine Map: 1 (max power, qualifying attack)
• Brake Bias: 58.5%
• Brake Driver (pedal sensitivity): 100%

SUSPENSION

• // FRONT
• Ride Height: 52 mm
• Wheel Rate FL / FR: 185 N/mm / 185 N/mm
• ARB: 6
• Brake Torque Multiplier: 100%
• Brake Bias: 58.5%
• // REAR
• Ride Height: 60 mm
• Wheel Rate RL / RR: 155 N/mm / 155 N/mm
• ARB: 5
• Diff Preload: 70 Nm
• Diff Coast: 0.35
• Diff Power: 0.65

DAMPERS

AERO

• Front Splitter: 7
• Rear Wing: 6
• Brake Ducts Front: 2
• Brake Ducts Rear: 3
• (Low drag bias for Brands' short straights, but enough rear wing to stabilize Paddock Hill entry and Clearways exit)

KEY SETUP NOT

• Paddock Hill Bend is the lap-defining corner — it's taken downhill, off-camber-feeling under braking, with compression loading the front axle hard; a touch more front ride height and firmer front slow-bump control stops the splitter bottoming and keeps front grip predictable for the latest possible brake release, which is where this lap time lives.

TRACK GUIDE

• Paddock Hill Bend: brake late and hard in a straight line before the crest, trail-brake slightly into the compression — carrying too much speed here ruins the whole lap, as it compromises Druids entry too.
• Druids: sacrifice outright entry speed for a clean, straight exit — this is the biggest traction zone on-track feeding Cooper Straight, so get on power early and let TC do the final work.
• Graham Hill Bend: trail-brake to rotate the car on entry, using the downhill gradient to help turn-in without scrubbing speed.
• McLaren Bend (T7): committed, high-lateral-load corner — minimum steering correction, smooth throttle application through the apex is key to carrying speed onto the next section.
• Clearways/Clark Curve: this is where the lap is won or lost on exit — get the car rotated early and be full throttle by apex for maximum speed onto the pit straight; a wide, late-apex line maximizes exit speed.