Mercedes-AMG GT4

TYRES

• Slicks (dry), Front: 2.05 bar, Rear: 2.00 bar — hot qualifying target; cold blanket set to 80°C front/rear if blankets permitted. Optimal operating window for max grip: 85–95°C.

ELECTRONICS

• TC: 2 (low, max rotation, aggressive driver can manage slip)
• ABS: 4
• Engine Braking / Brake Magic: Medium-High (reduce slightly for rear stability into Les Combes and Bus Stop)
• Brake Bias: F: 58% / R: 42%
• Brake Pressure: 100%

DRIVETRAIN

• Fuel Map: Map 1 — full power, richest map, max qualifying performance, no fuel saving
• Gear Ratios:
• 1st: 2.92
• 2nd: 2.19
• 3rd: 1.72
• 4th: 1.41
• 5th: 1.19
• 6th: 1.02
• Final Drive: 3.44 — tuned for Kemmel Straight / Blanchimont top speed vs Bus Stop traction compromise

SUSPENSION

• // FRONT
• Ride Height: 55 mm
• Wheel Rate FL / FR: 32000 N/m / 32000 N/m
• ARB: 1800 N/m
• Brake Torque Multiplier: 100%
• Brake Bias: 58%
• // REAR
• Ride Height: 58 mm
• Wheel Rate RL / RR: 28000 N/m / 28000 N/m
• ARB: 1400 N/m
• Diff Preload: 40 Nm
• Diff Coast: 0.35
• Diff Power: 0.55

DAMPERS

AERO

• Front Splitter: Level 3 (max allowed for GT4 aero kit), Rear Wing: 5 (high downforce for esses stability & Blanchimont confidence), Brake Ducts: Front 4 / Rear 3

KEY SETUP NOTE

• Spa's long high-speed sections (Kemmel, Blanchimont) demand high-speed stability, but Eau Rouge/Raidillon compression and Bus Stop traction need a chassis that doesn't fight you on load transfer — slightly softer front ARB with stiffer rear wing keeps the GT4 planted through Raidillon while still allowing rotation for the final chicane exit onto the straight.

TRACK GUIDE

• Eau Rouge/Raidillon: full commitment flat in most GT4s if car is stable — late apex at Raidillon crest, trust the aero, don't lift mid-corner.
• Les Combes (T5): heavy braking zone after Kemmel straight — brake late, straight-line, rotate hard on entry for a tight apex, prioritize exit onto the back section.
• Pouhon (T9-10): long double-left, high commitment — carry min speed through first apex, progressively open throttle, car must track cleanly with no understeer push.
• Bus Stop Chicane (T18-19): final and most crucial lap time corner — late brake, sacrifice the first part slightly to maximize traction on exit for the straight — exit speed here is worth more than entry speed.
• Blanchimont: flat-out in quali trim if setup is stable — small lift k