Intake Manifold; Direct Fuel Injection (Dfi) - Porsche 911 Carrera 4 GTS User Handbook Manual

Intake manifold.

Take a deep breath. The These valves enable the system
911 Carrera GTS models are to switch between power- and
fitted with a variable resonance torque-optimised geometries
intake system featuring six for all six air intake tracts to
switchable, vacuum-controlled produce higher torque in the
valves. mid-rev range. The improved
charging of the combustion
chamber is made more efficient

Direct fuel injection (DFI).

by a flow-optimised intake duct. Efficiency is about getting more
The cooling system has been from less, and direct fuel injec-
adapted to the increased engine tion (DFI) is fitted as standard.
output. With millisecond precision,
DFI injects fuel at up to 120 bar
directly into the combustion
chamber by means of electro-
magnetically actuated injection
valves.
The spray and cone angles
have been optimised for torque,
power output, fuel consumption
and emissions, thus ensuring
homogeneous distribution of
the air/fuel mixture and, con-
sequently, efficient combustion.