2014 911 GT3 Section 2 9/12/13 7:51 AM Page 19
911 GT3 (991) 2 DME engine electronics 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
DME Engine electronics
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
2
order to improve driving performance.
Development objectives: • Reduce fuel consumption • Reduce emissions
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• 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
6-hole injector
Tank capacity
16.9 gal. (64 l)
Fuel reserve
2.6 gal. (10 l)
Power
475 hp (350 kW)
at engine speed
8,250 rpm
Max. torque
325 ft. lb. (440 Nm)
at engine speed
6,250 rpm
Compression ratio
12.9 : 1
2.1
General
19
VarioCam intake camshaft
0 to 50° crank angle
2.2
Fuel system
20
VarioCam exhaust camshaft 0 to 30° crank angle
2.3
Intake system
23
Idle speed
740 ± 80
2.4
Mixture formation
27
Governed speed
9,000 rpm
2.5
Ignition system
29
2.6
Exhaust system
31
2.7
Additional DME functions
35
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