ENGINE
3.0L inline 6 cylinder engine (S55) with two mono-scroll turbochargers
3,027 cc (compare to 2,979 cc of N55)
89.6mm bore / 80mm stroke over-square (compare to 84mm bore / 89.6mm stroke under-square of N55)
Derived from N55 engine
Direct Injection
VALVETRONIC
Double-VANOS
closed-decked crankcase (4.4 lbs / 2kg lighter)
twin-wire arc-spray coating (instead of liners) in cylinder bores reduce engine weight
20 lbs lighter than V8 S65 engine (from E90/E92 M3)
430 HP (approximately) from around 5000-7300 RPM
"far beyond" 369+ LB-FT (500 Nm) from under 2000 RPM to over 5000 RPM
See Dyno Chart
Slightly above 7500 RPM redline
TURBOS
Two Mitsubishi mono-scroll turbochargers
18.1 PSI / 1.25 BAR max peak
Pre-tensioned in Sport and Sport+ modes (keep spinning at a high rate of speed even after throttle lift-off, for ultra quick response - more details)
Impulse charging for optimized responsiveness
Flow-enhanced manifolds
Electric wastegate actuator
COOLING
Double-flow oil recirculation pumps
Turbocharger suction system
Main radiator plus additional radiators for the high- and low-temperature circuits, turbocharger and transmission
Large indirect intercooler (sits atop engine, necessitating hood bulge)
Low-weight magnesium oil sump (2.2 lbs / 1kg lighter)
Temperature-stabilizing electric water pump