To give the New Ferrari Daytona SP3 the most exhilarating V12 on the market, Ferrari chose the 812 Competizione’s engine as its starting point, but relocated it to the mid-rear position to optimise the intake and exhaust layout as well as fluid-dynamic efficiency. The result is that the F140HC engine is the most powerful internal combustion engine ever built by Ferrari and deliver a massive 840 cv with the typical exhilarating power and sound of a Prancing Horse V12.
The engine has a 65° vee between its cylinder banks and retains the 6.5-litre capacity of its predecessor, the F140HB, sported by the 812 Competizione from which it inherits its upgrades. All the developments enhance the performance of a powertrain that sets the new benchmark for its category thanks to its astonishing soundtrack – obtained through targeted work on both the intake and exhaust lines – and the 7-speed gearbox, which is now even faster and more satisfying than ever thanks to the development of specific strategies.
Maximum revs of 9,500 rpm and a torque curve that rises rapidly all the way up to maximum revs gives occupants the feeling of boundless power and acceleration. Particular attention was lavished on reducing the engine’s weight and inertia by adopting titanium con rods, which are 40% lighter than steel, and the use of a different material for the pistons. The new piston pins have a Diamond Like Carbon treatment (DLC), which reduces the coefficient of friction to improve performance and fuel consumption. The crankshaft has been rebalanced and is now also now 3% lighter.
Valve opening and closing is by way of sliding finger followers, derived from F1 and developed with the aim of reducing mass and availing of more high performance valve profiles. The sliding finger followers also feature DLC coating and their function is to transmit the action of the cam (again with DLC coating) to the valve using a hydraulic tappet as the pivot for its movement.
The intake system has been radically redesigned: the manifold and the plenum are now more compact to reduce the overall length of the tracts and deliver power at high revs, while the torque curve is optimised at all engine speeds by a system of variable geometry inlet tracts. The system enables the length of the intake tract assembly to be continuously varied, adapting it to the engine firing intervals to maximise the dynamic charge in the cylinder. A dedicated hydraulic system governs the actuators and is controlled by the ECU in a closed loop, adjusting the inlet tracts’ length position on the basis of the engine’s load.
Combined with optimised cam profiles, the variable valve timing system creates an unprecedented system of equal height pressure peaks required to obtain power at high revs without sacrificing any torque at low and medium revs. The result is a feeling of continuous, rapid acceleration, culminating in astonishing power at maximum revs.
The management strategies for the gasoline direct injection system (GDI at 350 bar) have been further developed: it now comprises two petrol pumps, four rails with pressure sensors that provide feedback to the closed loop pressure control system and electronic injectors. Calibration of the timing and amount of fuel injected at each injection, in addition to an increase in injection pressure, have made it possible to reduce polluting emissions and particulate formation by 30% (WLTC cycle) compared to the 812 Superfast.
The ignition system is constantly monitored by the ECU (ION 3.1) which has an ion-sensing system that measures ionising currents to control ignition timing. It also has a single and a multi-spark function for when multiple ignitions of the air-fuel mixture are required for smooth, clean power delivery. The ECU also controls combustion in the chamber to ensure that the engine is always working at peak thermodynamic efficiency conditions, thanks to a sophisticated strategy that recognises the octane rating of the fuel in the tank.
A completely new variable-displacement oil pump was developed to allow oil pressure to be continuously controlled right across the engine’s entire operating range. A solenoid valve, controlled by the engine ECU in a closed loop, is used to control the pump’s displacement in terms of flow and pressure, delivering only the amount of oil required to guarantee the functioning and reliability of the engine at every point in its functioning. Importantly, in order to reduce friction and improve mechanical performance, a less viscous engine oil than in the previous V12 is being used, and the entire oil scavenge line has been made more permeable to make it more efficient.
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