Ford Mustang GT3

TYRES

• Compound: Dry (medium), Front 27.8 PSI cold, Rear 27.3 PSI cold, Blanket temp 80°C
• Optimal operating window: 85–105°C for peak grip; race stints target 90–95°C average to balance deg over a race-length run.

ELECTRONICS

• TC1: 5, TC2: 3, ABS: 5, Engine Braking/Brake Magic: Medium (3), Brake Bias: 54.5% front (adjustable 53.5–56% in cockpit for race)

SUSPENSION

• // FRONT
• Ride Height: 65 mm
• Wheel Rate FL / FR: 145000 N/m / 145000 N/m
• ARB: 280 N/m
• Brake Torque Multiplier: 98%
• Brake Bias: 54.5%
• // REAR
• Ride Height: 70 mm
• Wheel Rate RL / RR: 125000 N/m / 125000 N/m
• ARB: 220 N/m
• Diff Preload: 60 Nm
• Diff Coast: 0.55
• Diff Power: 0.75

DAMPERS

AERO

• Front Splitter: 3 (of 6 clicks), Rear Wing: 8 (of 12), Downforce Level: Medium-High, Brake Ducts F/R: 4/3 (of 6) — biased toward front cooling for T10A heavy braking demands

KEY SETUP NOTE

• The high power lock diff (0.75) combined with stiffer rear ARB is essential to control V8 torque-induced oversteer on T6 and T12 exit — but this same setup demands earlier, smoother throttle application late in stints as rear tyre deg increases; be prepared to short-shift T6/T12 in final third of a long stint to preserve rear grip for T10A braking stability.

TRACK GUIDE

• T1: Trail brake deep but leave margin — this car's heavy front end punishes late-late braking with front tyre washout; brake 5% earlier than instinct, carry rotation with steering not brakes.
• T5 Esses: Commit fully, minimal steering correction — stiffer rear ARB helps but the car will still move around; trust the platform, stay full throttle, small inputs only.
• T6: This is the lap-defining corner — sacrifice minimum entry speed for a clean, early throttle application; it sets up the entire back straight top speed.
• T10A/10B Chicane: The biggest braking zone on track and where the Mustang's front-heavy weight bias is most exposed — brake in a straight line, get majority of braking done before turn-in, avoid trail-braking into 10A or you'll understeer wide.
• T12: Traction out of this corner is worth more than entry speed — get the car rotated early, unwind steering, and prioritize a straight-line power application onto the front straight for maximum speed advantage.

THEORETICAL BEST LAP

• 1:16.800 — theoretical optimal sector composite, dry track, low fuel, fresh tyres, iRacing simulation baseline.

REAL WORLD RECORD

• 1:10.099 — Alexander Sims, 2023, IMSA/GTWCA reference lap (GT3-spec, not Mustang-spec