Ginetta G55 GT4

TYRES

• Semi-slick GT4 compound, front 2.05 bar, rear 2.00 bar, blanket temp 80°C (if heaters permitted; otherwise cold-set to same targets and build in first 2 laps)

ELECTRONICS

• TC: 4
• ABS: 3
• Engine Braking/Brake Magic: Medium (3/5)
• Brake Bias: F: 58% / R: 42%
• Brake Pressure: 95%

DRIVETRAIN

• Fuel Map: Map 2 — balanced fuel/power delivery, slight lean mixture for race stint management, switch to Map 1 (rich) only for qualifying-style overtakes
• Gear Ratios:
• 1st – 3.615
• 2nd – 2.471
• 3rd – 1.882
• 4th – 1.519
• 5th – 1.276
• 6th – 1.088
• Final Drive – 3.722

SUSPENSION

• // FRONT
• Ride Height: 55 mm
• Wheel Rate FL / FR: 32000 N/m / 32000 N/m
• ARB: 24 N/mm
• Brake Torque Multiplier: 95%
• Brake Bias: 58%
• // REAR
• Ride Height: 58 mm
• Wheel Rate RL / RR: 28000 N/m / 28000 N/m
• ARB: 18 N/mm
• Diff Preload: 40 Nm
• Diff Coast: 0.5
• Diff Power: 0.35

DAMPERS

AERO

• Front splitter: Level 2 (of 3), Rear wing: 4 clicks (of 6-position range), overall downforce level Medium-High, brake ducts: Front 2/5, Rear 2/5 (manage brake temps over race stint without overcooling)

KEY SETUP NOTE

• The G55 GT4 has a relatively soft factory-feel chassis compared to GT3 cars — resist the urge to over-stiffen the rear ARB for Craner Curves stability, as this will cause snap oversteer on the downhill compression; instead rely on slightly firmer rear dampers (rebound) and a touch more rear ride height to keep the car planted through the sweeps while preserving rear tyre life for Goddards and Melbourne traction zones.

TRACK GUIDE

• Melbourne Hairpin (T1): Brake aggressively but in a straight line — trail brake only lightly due to GT4's weaker initial bite; prioritize a clean, tight apex for strong traction exit, as this feeds the entire Craner Curves sequence
• Craner Curves (T2/3): Commit fully on entry with a stable, neutral platform — lift-and-coast approach costs more time than it saves here; keep steering inputs smooth, let the car float through the dip without correcting
• Old Hairpin (T4): Late apex this corner to maximize exit traction for the long uphill run to Coppice — sacrifice a bit of entry speed for a clean, early throttle application
• Coppice (T6) & Fogarty Esses (T8): These are where ultimate lap time is won — carry maximum committed speed, trust the aero and rear stability setup; any hesitation here costs 2-3 tenths minimum
• Goddards (T9): Treat as a traction corner, not a speed corner — get the car rotated early and prioritize a straight exit for maximum speed onto the pit straight, this is the last and most important overtaking/defending zone