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Setup Guides / iRacing / BMW M4 GT3 Evo @ Gesamtstrecke 24h - Nordschleife + GP-Strecke (Gesamtstrecke) [25.378 Km]

BMW M4 GT3 Evo

Gesamtstrecke 24h - Nordschleife + GP-Strecke (Gesamtstrecke) [25.378 Km] · iRacing · Updated Oct 24, 2026
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// AI Setup Engineer
iRacing · BMW M4 GT3 Evo · Gesamtstrecke 24h - Nordschleife + GP-Strecke (Gesamtstrecke) [25.378 Km] · 🔥 Hot Lap · ☀️ Dry

TYRES

  • Slick, F 27.5 PSI, R 27.0 PSI (hot track temp 42°C — slightly above baseline, small reduction from standard cold spec to avoid overheating on long Nordschleife straights). Optimal operating window: 85–100°C for peak slick grip; qualifying lap should target tyres entering the window within 1–2 corners of leaving the pits.

ELECTRONICS

  • TC: 3
  • ABS: 2
  • Engine Braking: 4 (medium, stability on Fuchsröhre/Kesselchen entries)
  • Brake Bias: 53.0% front (shifted slightly rearward from 53.5% to aid rotation on Nordschleife's tighter hairpins, given cooler qualifying fuel load)

SUSPENSION

  • // FRONT
  • Ride Height: 60 mm
  • Wheel Rate FL / FR: 145000 N/m / 145000 N/m
  • ARB: 155000 N/m
  • Brake Torque Multiplier: 100%
  • Brake Bias: 53.0%
  • // REAR
  • Ride Height: 65 mm
  • Wheel Rate RL / RR: 130000 N/m / 130000 N/m
  • ARB: 110000 N/m
  • Diff Preload: 50 Nm
  • Diff Coast: 0.45
  • Diff Power: 0.60

DAMPERS

Slow BumpSlow ReboundFast BumpFast Rebound
FL5200740026003800
FR5200740026003800
RL4600660023003400
RR4600660023003400

AERO

  • Front Splitter: 2 (minimum legal drag setting for Döttinger Höhe top speed)
  • Rear Wing: 4 (low-medium downforce, balance for high-speed sections vs Karussell/Adenauer grip)
  • Downforce Level: Low-Medium (favor top speed on GP straight + Döttinger Höhe, accept slightly less front grip in Esses)
  • Brake Ducts: F 2 / R 2 (minimal, cool track temps not an issue, favor low drag)

KEY SETUP NOTE

  • Nordschleife-GP combined lap is dominated by Döttinger Höhe top speed and stability through Fuchsröhre compression — run the lowest downforce you can control through the Karussell and Adenauer-Forst without losing confidence on turn-in, since the time gained on the 2km+ straight dwarfs what's lost in the twisty infield.

TRACK GUIDE

  • Fuchsröhre: full commitment flat-out downhill — the compression at the bottom loads the car hard, keep it straight and let the splitter/rear wing balance absorb it, any lift here costs massive time.
  • Karussell: use the banking, stay on the inner concrete line, slight trail-brake to rotate, get back to power early for the short straight after.
  • Döttinger Höhe: this is where the lap is won — minimize front aero drag, hold the car flat, brake as late as humanly possible into Antoniusbuche.
  • GP-Strecke infield (Schumacher-S, Mercedes-Arena): precise, late apex braking rewarded — aggressive trail braking here with the stable BMW platform to carry more min-speed.
  • Pflanzgarten/Stefan-Bellof-S: compression and crest combo, be ready for the car to go light — don't lift mid-air, trust the setup and stay committed on the exit kerbs.
// Theoretical Best
8:29.325
8:27.8xx — based on logged practice lap (26°C air/42°C track), adjusted for optimized qualifying-spec low-downforce aero and fresh-tyre single-lap pace; assumes dry, similar track temp, no traffic.
// Real World Record
No official record (GT3-class Nordschleife+GP combined lap records are inconsistently homologated; fastest known GT3 Nordschleife-only laps ~8:09 Nordschleife-only, not full combined circuit).
// Sim Record
~8:25–8:27 — iRacing, GT3 class, dry/optimal conditions, best community hotlap estimate (exact leaderboard record fluctuates with build/setup meta).
Setup built from this lap
8:29.325 ☀️
Scott de Jong
Gesamtstrecke 24h - Nordschleife + Grand Prix-Strecke (Gesamtstrecke) [25.378 Km]
BMW M4 GT3 Evo GT3
Lap 1 · 2 hours ago
iR Practice
☀️ Dry Track 42°C Air 26°C Wind 3 km/h
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