BMW M4 GT3

TYRES

• Slick — dry compound, front pressure 27.0 PSI cold, rear pressure 26.8 PSI cold. Optimal tyre operating window: 85–100°C for peak grip (front and rear). Blanket temp: 80°C (if applicable in LMU).

ELECTRONICS

• TC1: 3 (qualifying, minimal intervention for max rotation)
• TC2: 2
• ABS: 4
• Brake Bias: 54.5% front (in-cockpit adjustable ±1% for corner-specific trim)
• Engine Braking / Brake Magic: Medium-low setting (reduce rear locking into T1, T11, T20 hairpins)

SUSPENSION

• // FRONT
• Ride Height: 50 mm
• Wheel Rate FL / FR: 155000 N/m / 155000 N/m
• ARB: 65 N/mm
• Brake Torque Multiplier: 100%
• Brake Bias: 54.5%
• // REAR
• Ride Height: 55 mm
• Wheel Rate RL / RR: 140000 N/m / 140000 N/m
• ARB: 50 N/mm
• Diff Preload: 60 Nm
• Diff Coast: 0.45
• Diff Power: 0.65

DAMPERS

AERO

• Front Splitter: 4 (clicks, max attack low-drag balance)
• Rear Wing: 7 (of 10 — strong rear stability for Mulsanne braking + esses)
• Downforce Level: Medium-High (Sarthe qualifying trim — straight-line speed vs esses stability compromise)
• Brake Ducts: Front 4 / Rear 3 (single lap, no thermal concern)

KEY SETUP NOTE

• At Le Mans, straight-line speed dominates lap time (three long Mulsanne-style straights), so run the lowest rear wing your car can hold stable through the Porsche Curves and Esses (T2-T9 equivalent chicanes) — sacrifice a fraction of mid-corner grip for terminal velocity, since the straights are over 60% of the lap.

TRACK GUIDE

• Mulsanne Chicanes: brake in a straight line, very late — full commitment, downshift fast, get back to power early for the following straight burst.
• Porsche Curves: this is where the lap is won — carry max speed, trust the aero, smooth inputs, no lift if the car is balanced.
• Ford Chicanes (final): tight, technical — sacrifice minimum speed but nail the exit for the run to the line.
• Traction zones (Tertre Rouge, Arnage, Mulsanne corner): prioritize clean, straight exits over apex speed — long straights punish any wheelspin heavily.
• Tyre pressures and brake bias should favor high-speed stability given the low-downforce, high-speed nature of this circuit — err toward slightly more rear wing than pure Hypercar low-drag setups since GT3 cars need the stability.

THEORETICAL BEST LAP

• 3:23.000 — theoretical optimal sector composite, dry, low fuel, qualifying trim, BMW M4 GT3 in LMU.

REAL WORLD RECORD

• No official record (GT3 c

TYRES

• Slick (Dry) — Front 27.5 PSI, Rear 27.3 PSI cold set. Optimal operating window 80–95°C, peak grip ~88°C. Blanket temp: 80°C F/R.

ELECTRONICS

• TC1: 4, TC2: 3, ABS: 4, Engine Braking: Medium, Brake Bias: 54.5% (adjustable ±1% in-cockpit for Mulsanne braking zones)

SUSPENSION

• // FRONT
• Ride Height: 65 mm
• Wheel Rate FL / FR: 195000 N/m / 195000 N/m
• ARB: 145000 N/m
• Brake Torque Multiplier: 98%
• Brake Bias: 54.5%
• // REAR
• Ride Height: 70 mm
• Wheel Rate RL / RR: 175000 N/m / 175000 N/m
• ARB: 110000 N/m
• Diff Preload: 45 Nm
• Diff Coast: 0.5
• Diff Power: 0.65

DAMPERS

AERO

• Front Splitter: 4 clicks, Rear Wing: 5/10, Downforce Level: Medium-Low (Mulsanne efficiency priority), Brake Ducts: F 3 / R 3

KEY SETUP NOTE

• Le Mans demands a low-drag setup for the Mulsanne/Hunaudières straight — running rear wing 5/10 instead of a high-downforce esses setting costs minimal time through Porsche Curves but gains 3-4 km/h down the straights, which compounds massively over 13.6km per lap; balance this with slightly softer front ARB (145000 N/m) to retain front bite under trail-braking into Turn 1 and the Ford Chicanes.

TRACK GUIDE

• Turn 1 (Dunlop Chicane): Brake late but straight-line — the M4 GT3's stable front end allows aggressive trail braking, but don't turn in until fully settled or you'll run wide onto the sausage kerb.
• Porsche Curves: This is where lap time is won — commit to a smooth, high-minimum-speed line; the M4's neutral balance rewards carrying speed rather than late apex braking here.
• Ford Chicanes (both): Use the aggressive kerb-riding style here — attack the inside kerbs hard for exit traction onto the following straight, but respect rear stability on corner exit with TC set to 4.
• Mulsanne Straight: Two chicanes mid-straight require full braking from ~300 km/h — brake in a straight line, downshift early, prioritize traction out over rotation.
• Arnage & Turn 1 exit: Traction is critical — get on throttle progressively; the diff power lock at 0.65 helps put power down without excessive wheelspin on tyre-degraded stints.

THEORETICAL BEST LAP

• 3:22.500 — theoretical optimal sector composite, dry track, low fuel, fresh tyres, clean traffic-free lap.

REAL WORLD RECORD

• 3:17.476 — Mike Conway, Toyota TS050 Hybrid (LMP1), 2019 Le Mans 24 Hours qual