4.0L V8 RSS
M178 HPFP Upgrade Guide: AMG GT Fuel Pump Upgrade — 250bar vs 350bar for C190 Builds
The Mercedes-AMG GT family runs the M178 — the dry-sump variant of AMG's 4.0L twin-turbo V8. Like its wet-sump sibling (the M177), the M178's stock high-pressure fuel pump is the first bottleneck when pushing beyond factory output. This guide covers HPFP upgrade options specifically for the AMG GT, GTS, GTC, GTR, and Black Series. M178 vs M177 — What's Different? The M178 shares the same 4.0L twin-turbo V8 block architecture as the M177 but uses a dry-sump lubrication system instead of wet sump. This allows the engine to sit lower in the chassis for a lower center of gravity —...
M177 HPFP Upgrade Guide: 250bar vs 350bar — Which High Pressure Fuel Pump Kit Do You Need?
The stock high-pressure fuel pump on the Mercedes-AMG M177 4.0L V8 BiTurbo is the first component to hit its limit when you push beyond factory power. Whether you're running a Stage 2 ECU calibration, upgraded turbos, or ethanol-blended fuels, the OEM HPFP cannot deliver enough volume to maintain stable rail pressure — and that means lost power, misfires, or worse. This guide covers everything you need to know about upgrading the HPFP on the M177 platform: what the stock system's limits are, how 250bar and 350bar kits compare, which models fit, and what supporting modifications you need. Why the Stock...
McLaren 720S & 765LT Tuning Guide — M840T Engine, ECU Calibration & Full Build Path
The M840T Engine The McLaren M840T is a 4.0-liter twin-turbocharged V8 that powers the 720S, 720S Spider, 765LT, and 765LT Spider. Developed in partnership with Ricardo, it is one of the most power-dense production V8 engines ever built. Engine Specifications Specification 720S 765LT Displacement 3,994 cc 3,994 cc Configuration 90° V8, flat-plane crank 90° V8, flat-plane crank Turbochargers Twin-scroll Twin-scroll (higher flow) Peak Power 710 HP @ 7,250 RPM 755 HP @ 7,500 RPM Peak Torque 568 lb-ft @ 5,500 RPM 590 lb-ft @ 5,500 RPM Redline 8,500 RPM 8,500 RPM Compression Ratio 8.7:1 8.7:1 Dry Weight (engine) 198 kg...
M177 Forged Internals: What AMG Built Different and Where the Limits Are
AMG Built the M177 to Take Abuse — Here's What's Inside When Mercedes-AMG designed the M177, they didn't build a passenger-car engine and then add turbochargers. They built a motorsport-grade bottom end first and then wrapped a luxury car around it. The result is a 4.0-litre twin-turbo V8 with forged internals that can handle well over 800 HP on the stock rotating assembly — a claim very few factory engines can make. This guide breaks down exactly what AMG put inside the M177, why each component matters for high-power builds, and where the factory parts reach their limits. Forged Crankshaft...
AMG 4MATIC+ Transfer Case: How It Works and High-Power Limits
What Is AMG’s 4MATIC+ and How Does It Handle 800+ HP? Every AMG E63, GT 63 4-Door, and GLC 63 runs 4MATIC+ — Mercedes-AMG’s fully variable all-wheel-drive system. Unlike Audi’s Quattro or BMW’s xDrive, 4MATIC+ can send 100 % of torque to the rear wheels on demand, effectively switching between AWD and RWD without the driver lifting off the throttle. For tuners pushing the LS2-spec M177 to 700, 800, or 900+ HP, the 4MATIC+ transfer case is both a launch-traction advantage and a potential weak link. This guide breaks down exactly how the system works, where it reaches its limits,...