Ginetta G55 GT4

TYRES

• Slick (medium compound), Front: 2.05 bar, Rear: 2.00 bar, Tyre blanket: 80°C (if available, else cold-set above values accounting for 0.15–0.20 bar rise once up to temp)

ELECTRONICS

• TC: 3 (moderate slip allowance for traction off Old Hairpin/Goddards)
• ABS: 2 (low intervention for late braking control)
• Engine Braking: Medium
• Brake Pressure: 92%
• Brake Bias: F: 58% / R: 42%

DRIVETRAIN

• Fuel Map: Map 2 — balanced power/fuel economy for race stint management, switch to Map 3 (richer) only for overtakes
• Gear Ratios:
• 1st: 3.083
• 2nd: 2.421
• 3rd: 1.955
• 4th: 1.647
• 5th: 1.421
• 6th: 1.235
• Final Drive: 3.846

SUSPENSION

• // FRONT
• Ride Height: 55 mm
• Wheel Rate FL / FR: 32,000 N/m / 32,000 N/m
• ARB: 28 N/mm
• Brake Torque Multiplier: 92%
• Brake Bias: 58% / 42%
• // REAR
• Ride Height: 58 mm
• Wheel Rate RL / RR: 29,000 N/m / 29,000 N/m
• ARB: 22 N/mm
• Diff Preload: 40 Nm
• Diff Coast: 0.5
• Diff Power: 0.6

DAMPERS

AERO

• Front splitter: Level 2 (fixed GT4 spec), Rear wing: 4 (of 6), Downforce Level: Medium-High, Brake ducts: 2 (front) / 2 (rear) — moderate cooling, tyre deg managed via pressure not excessive airflow

KEY SETUP NOTE

• Donington National rewards a stable rear for Coppice exit and sharp front turn-in for Macleans — running slightly stiffer front ARB with softer rear compression lets you rotate hard on entry without sacrificing traction on the late-corner throttle application, critical since this layout's lap is dominated by hairpin-to-fast-corner transitions with no Craner Curves to generate rear tyre temp.

TRACK GUIDE

• Melbourne (T1): late, trail-braked entry — carry speed in, rotate mid-corner, get on power early for the run down to Old Hairpin
• Old Hairpin (T4): this is your biggest traction zone — brake deep, rotate the nose aggressively, unwind steering early to maximize drive out onto the next straight
• Macleans (T7): a fast, committed direction change — front-end response is everything here; resist lifting, trust the front grip from your setup
• Coppice (T6): demands a planted rear under load — any instability here costs major time onto the Starkeys Bridge/Esses run
• Goddards (T9) onto the main straight: this exit defines your lap time — prioritize a clean, early throttle application over outright minimum-speed apex, since the following straight is the main overtaking zone