Toyota Supra GT4 Cup 2019

TYRES

• Semislick compound, Front 27.5 PSI cold / Rear 27.0 PSI cold (target hot ~30–31 PSI front, ~29–30 PSI rear). No tyre blankets assumed — first lap treated as warm-up; slightly higher cold pressures front help rapid warm-up into the Esses.

ELECTRONICS

• TC: 3 (fixed-ECU GT4 Cup spec, moderate slip control for traction zones at Hairpin/Spoon exit)
• ABS: 4
• Engine Braking: Medium (3/5 if adjustable)
• Brake Bias: 58.5% front (set at pedal box, see below)

SUSPENSION

• // FRONT
• Ride Height: 58 mm
• Wheel Rate FL / FR: 95,000 N/m / 95,000 N/m
• ARB: 14,000 N/m
• Brake Torque Multiplier: 100%
• Brake Bias: 58.5%
• // REAR
• Ride Height: 60 mm
• Wheel Rate RL / RR: 88,000 N/m / 88,000 N/m
• ARB: 11,000 N/m
• Diff Preload: 40 Nm
• Diff Coast: 0.5
• Diff Power: 0.6

DAMPERS

AERO

• Front splitter: 2 (of typical 0–4 range)
• Rear wing: 4 (of typical 0–6 range)
• Downforce level: Medium-high — biased for 130R/Esses stability over straight-line top speed
• Brake ducts: 3 (if adjustable, moderate cooling for race-distance thermal management)

KEY SETUP NOTE

• This car's low-downforce GT4 aero package makes 130R and the Esses the defining test — prioritize rear wing load and rear ARB/damper stability over outright straight-line speed; a slightly higher rear wing costs you little on Suzuka's short straights but buys massive confidence through the flat-out sections where this car is naturally nervous.

TRACK GUIDE

• Esses (T3-T7): Commit early, smooth minimal steering corrections — any lift unsettles the rear on this car's shorter wheelbase; carry momentum rather than max entry speed.
• 130R (T17/18): Near-flat in this GT4 car with the recommended aero; trust the rear end, stay full throttle, let the wing do the work — lifting here costs more time than any other point on track.
• Hairpin (T14): Late, hard trail-brake entry, rotate car on entry, get back to power early and straight for the long straight — this is the biggest traction/exit speed payoff on the lap.
• Degner (T12/13): Partly blind — brake in a straight line before turn-in, avoid trail-braking into the second part; the Supra's diff setting helps rotation but punishes mid-corner throttle lift.
• Spoon Curve (T15/16): Double-apex — resist the urge to turn in early; patience on entry sets up a much faster, flatter exit onto the 130R approach.