2.1 General

The new 911 GT3 features direct fuel injection (DFI) for the first time. In contrast to the conventional intake manifold injection system used on the previous GT3 models, this technology offers advantages in terms of increased power and torque as well as low fuel consumption and low CO2 emissions. The main reason for using this injection technology for the new 911 GT3 was above all to increase engine power in order to improve driving performance.

Development objectives:

• Reduce fuel consumption • Reduce emissions • More spontaneous response

Technical data - DME

DME control unit Bosch MED 17.1.11 Low-pressure fuel supply Demand-controlled in-tank fuel pump, with integrated pressure regulator, maximum 79.75 psi (5.5 bar) High-pressure fuel supply Two fuel high-pressure pumps with one quantity control valve each Fuel injection pressure 362.5 psi (25 bar) (idle speed) up to 2,900 psi (200 bar) (full load)

Injector Tank capacity Fuel reserve Power at engine speed Max. torque

6-hole injector 16.9 gal. (64 l) 2.6 gal. (10 l) 475 hp (350 kW) 8,250 rpm 325 ft. lb. (440 Nm) at engine speed 6,250 rpm Compression ratio 12.9 : 1 VarioCam intake camshaft 0 to 50° crank angle VarioCam exhaust camshaft 0 to 30° crank angle Idle speed 740 ± 80 Governed speed 9,000 rpm DME Engine electronics 2

2.1 General 2.2 Fuel system 2.3 Intake system 2.4 Mixture formation 2.5 Ignition system

29 2.6 Exhaust system 31 2.7 Additional DME functions 35