Toyota Supra GT4 Cup 2019

TYRES

• Semislick compound, Front 29.0 PSI cold (target ~32 PSI hot), Rear 28.5 PSI cold (target ~31.5 PSI hot). No tyre blankets in GT4 — treat first lap as a tyre-building lap, push progressively.

ELECTRONICS

• TC: 2 (low — aggressive traction off hairpin without killing drive)
• ABS: 4 (moderate, allows late trail-braking into T1 without lockup)
• Engine Braking/Brake Magic: not adjustable on this car (fixed GT4 ECU map)
• Brake Bias: 58.5% front

SUSPENSION

• // FRONT
• Ride Height: 55 mm
• Wheel Rate FL / FR: 95,000 N/m / 95,000 N/m
• ARB: 28,000 N/m
• Brake Torque Multiplier: 100%
• Brake Bias: 58.5%
• // REAR
• Ride Height: 58 mm
• Wheel Rate RL / RR: 85,000 N/m / 85,000 N/m
• ARB: 18,000 N/m
• Diff Preload: 50 Nm
• Diff Coast: 0.4
• Diff Power: 0.6

DAMPERS

AERO

• Front splitter: fixed (no adjustment on this GT4 car)
• Rear wing: 4 (of available range) — max practical downforce for a low-drag, short lap track with no long straights needing low-drag trim
• Brake ducts: 2 front / 2 rear (short lap, minimal cooling needed, prioritize low drag)

KEY SETUP NOTE

• The Supra GT4's open(ish) diff and modest power lock mean the Spitzkehre exit traction depends almost entirely on mechanical rear grip and diff power lock setting — running power lock toward 0.6 with soft-ish rear ARB (18,000 N/m) lets the inside rear tyre stay loaded enough to put power down without snap-oversteer on corner exit, which is where this track's lap time is won or lost.

TRACK GUIDE

• T1 Einfahrt Motodrom: brake as late as possible in a straight line, trail-brake slightly into the apex — the Supra's stable front end under brakes rewards late, hard braking, but don't carry entry speed into the exit curb or you'll unsettle the rear onto the straight.
• Mercedes Arena (T6-T9): commit to a smooth, high-minimum-speed line through the flowing S-section — lift-and-coast kills your rhythm here; trust the rear stability from the 18,000 N/m rear ARB setting and keep inputs progressive.
• T11 Spitzkehre: this is the lap-defining corner — brake hard and late, rotate the car on entry (trail brake + light steering), then get back to full throttle progressively from apex, using the diff's power lock to drive off the corner without wheelspin.
• Exit onto Motodrom Straight: full commitment on exit kerbs is essential — track out fully to maximize straight-line speed into T13/14 and the pit straight.
• T13/14 Final complex: small but important — carry traction-focused exit speed here as it feeds directly onto the long pit straight, so prio