Mercedes-AMG GT4

TYRES

• Slick (Dry) — Front: 27.5 PSI, Rear: 27.0 PSI cold
• Tyre blanket temp: 80°C front/rear
• Optimal operating window: 75–90°C for peak grip — qualifying lap should target tyres entering track near top of this band given only 1-2 laps before peak

ELECTRONICS

• TC: 3
• ABS: 4
• Engine Braking / Brake Magic: Low-Mid (reduce to aid rotation into chicanes)
• Brake Bias: 58% front

SUSPENSION

• // FRONT
• Ride Height: 55mm
• Wheel Rate FL / FR: 160 N/mm / 160 N/mm
• ARB: 6
• Brake Torque Multiplier: 100%
• Brake Bias: 58%
• // REAR
• Ride Height: 60mm
• Wheel Rate RL / RR: 140 N/mm / 140 N/mm
• ARB: 4
• Diff Preload: 50 Nm
• Diff Coast: 0.3
• Diff Power: 0.6

DAMPERS

AERO

• Front Splitter: 2
• Rear Wing: 3
• Brake Ducts: Front 2 / Rear 2
• Priority: minimum drag for Monza's long straights — accept slightly higher mid-corner speed loss for top speed gain on Rettifilo/Parabolica exit

KEY SETUP NOTE

• The GT4 Mercedes has less outright downforce and power than GT3 cars, so Monza setup must prioritize mechanical rotation (soft rear ARB, front-biased brake setup) over aero stability — carrying min speed through Lesmo 2 and Ascari matters more than outright chicane kerb stability since you're giving up less lap time in low-grip zones than on the straights.

TRACK GUIDE

• Rettifilo (T1/2): Brake as late as possible in a straight line, release trail-brake early to rotate — GT4 braking distances are longer than GT3, don't overdrive entry or you'll scrub exit speed onto the next straight.
• Curva Grande (T3): Taken near-flat in GT4 — lift slightly only if rear feels light; commit full throttle early as it feeds into braking zone for Roggia.
• Variante della Roggia (T4/5): Similar heavy stop — prioritize a clean, stable platform over max late braking; GT4 has less brake power so lock-ups punish more than in GT3.
• Lesmo 1/2: Rotate early at Lesmo 1 on a touch of trail brake, then be patient at Lesmo 2 — get the car pointed before full throttle since it feeds the long run to Ascari.
• Ascari/Parabolica: Smooth, flat inputs over Ascari kerbs (low rear ARB helps absorb bumps); Parabolica is the lap-defining corner — a wide, late-apex exit maximizes speed onto the straight; this is where GT4 lap time is won or lost due to lower power reserves.

THEORETICAL BEST LAP

• 1:49.500 — theoretical optimal based on composite of best sector times, dry/green track, single hot lap state

REAL WORLD RECORD

• No official record (GT4 class lap records at Monza vary by