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Setup Guides / iRacing / McLaren 720S GT3 Evo @ Long Beach - Grand Prix [3.167 Km]

McLaren 720S GT3 Evo

Long Beach - Grand Prix [3.167 Km] · iRacing · Updated Oct 17, 2026
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// AI Setup Engineer
iRacing · McLaren 720S GT3 Evo · Long Beach - Grand Prix [3.167 Km] · 🔥 Hot Lap · ☀️ Dry

TYRES

  • Slick, Front 27.0 PSI, Rear 26.5 PSI (cold set) — session Air 22°C / Track 25°C matches reference lap, pressures trimmed 0.5 PSI from ACC base since qualifying run is short, tyres will climb quickly into fast-lap window. Optimal operating window for this compound: 85–95°C tread temp for peak grip, with rears tolerant up to ~100°C under max attack.

ELECTRONICS

  • TC1: 5
  • TC2: 3
  • ABS: 4
  • Engine Braking / Brake Magic: Medium-High (coast map 3/5)
  • Brake Bias: 54.0% front

SUSPENSION

  • // FRONT
  • Ride Height: 60 mm
  • Wheel Rate FL / FR: 145000 N/m / 145000 N/m
  • ARB: 120000 N/m
  • Brake Torque Multiplier: 100%
  • Brake Bias: 54.0%
  • // REAR
  • Ride Height: 65 mm
  • Wheel Rate RL / RR: 165000 N/m / 165000 N/m
  • ARB: 95000 N/m
  • Diff Preload: 50 Nm
  • Diff Coast: 0.7
  • Diff Power: 0.35

DAMPERS

Slow BumpSlow ReboundFast BumpFast Rebound
FL5200 Nsm6800 Nsm2600 Nsm3400 Nsm
FR5200 Nsm6800 Nsm2600 Nsm3400 Nsm
RL4800 Nsm7200 Nsm2400 Nsm3600 Nsm
RR4800 Nsm7200 Nsm2400 Nsm3600 Nsm

AERO

  • Front Splitter: Max (5/5)
  • Rear Wing: 4/5 (high downforce bias for rear stability through Turns 1, 9, 11)
  • Brake Ducts: Front 2/6, Rear 3/6 (single lap, minimal cooling need)

KEY SETUP NOTE

  • Long Beach's bumpy, low-grip street surface combined with the 720S's rear-weighted mechanical balance means running slightly more rear wing than normal GT3 practice is essential — it controls the car over the Turn 1 bump and through the fast Turn 9/10 kink without costing meaningful straight-line speed on this short-straight track.

TRACK GUIDE

  • Turn 1: Late, hard trail-brake entry — use high coast diff lock to rotate without snap-oversteer over the bump at apex.
  • Fountain Straight into Turn 11 (hairpin): Biggest overtaking/lap-time zone — brake as late as ABS 4 allows, use full rear grip from the stiffer wheel rate to stop the rear stepping out on initial turn-in.
  • Turns 5-6 (chicane): Minimize steering input, carry speed through — the stiff ARB setup rewards smooth, committed inputs over aggressive sawing at the wheel.
  • Shoreline Drive section (Turns 8-9): Full commitment flat-out — the 4/5 rear wing setting pays off here, trust the rear end.
  • Final corner onto front straight: Traction is king — be patient with throttle, let the diff power lock (0.35) manage the exit, since wheelspin here costs the most time on the straight.
// Theoretical Best
1:19.812
— based on reference 1:20.075 lap, adjusted for identical weather/temps (no conditions delta), gained via optimized rear wing/damper setup for max-attack single lap at near-empty fuel.
// Real World Record
No official record (GT3 production car class times vary widely by series; no single recognized McLaren 720S GT3 Evo record at Long Beach).
// Sim Record
Approx. 1:19.5 — iRacing GT3 class, dry conditions, best community hotlap estimate (unofficial, varies by season/build).
Best lap on record
1:20.075
Long Beach - Grand Prix [3.167 Km]
McLaren 720S GT3 Evo GT3
Lap 3 · 1 day ago
iR Qualifying
☀️ Dry Track 25°C Air 22°C Wind 9 km/h
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