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McLaren 720S ECU Tuning Guide: M840T 4.0L Twin-Turbo V8 Stage 1 & 2 Power, Mods & GCC Heat Tips
The McLaren 720S is one of the most tuner-friendly supercars ever built. Its M840T 4.0-litre twin-turbo flat-plane-crank V8 responds dramatically to ECU calibration — a Stage 1 tune pushes past 780 hp, and with supporting hardware the platform comfortably reaches 900–1,100+ hp on stock turbos. The lightweight carbon MonoCell II chassis, hydraulic cross-linked suspension, and 7-speed SSG dual-clutch gearbox handle the extra power with minimal reinforcement.This guide covers Stage 1, Stage 2, turbo upgrade paths, GCC heat management, and real-world power expectations from YPG Motorsport in Kuwait.M840T Engine — Factory Specifications Model Years HP Torque Notes 720S Coupé 2017–2022 710...