A more recent technology frequently used is Diamond-Like-Coating (DLC) of the finger followers, which act on the cams to open the valves. DLC reduces friction between surfaces and that too reduces valvetrain loads.
The cylinder bores of the aluminium alloy block are plasma spray coated. Pistons can’t slide in alloy bores, the material is too soft, and the traditional approach was to insert cast iron liners. Plasma spray coating is the latest method for replacing that, reducing weight and friction.
Dry sump lubrication includes an electronically controlled variable displacement oil pump that should minimise the power consumed in pumping oil, with a four-stage pump to scavenge the dry sump.
On the intake side, the engine is fed using both direct and port fuel injection. This is not uncommon and every manufacturer has it own strategy for when each is used to get the best of both worlds.
Typically DI is used at high rpm to optimise fuel and air mixing and also cool the air inside the cylinder, with PI being used at low rpm to encourage stable combustion.
Twin-scroll turbos, one for each bank of cylinders, separate exhaust pulses for fast response. The net result of all this attention to detail is an engine that produces 915bhp.
Combined with the hybrid e-module mounted on the transmission, that rises to 1258bhp, backed by 988lb ft from 2500rpm. Mighty indeed.
