Porsche 911 Turbo User Handbook Manual page 21

Fuel injection. The role of distributor is
performed by the engine
Fuel is supplied to each of the management system, which
six cylinders by means of operates the coils directly to
sequential fuel injection. The assure optimal performance
timing and volume of each with minimal fuel consumption.
injection are controlled by the
engine management system.
Adjustments are based on a range Exhaust system.
of variables, such as throttle
position, engine speed, boost The exhaust system plays the
pressure, coolant temperature final role in maximizing engine
and exhaust-gas composition. In performance. The 911 Turbo's
this way, both combustion and all-stainless-steel exhaust system
fuel consumption are optimized. A consists of two separate tracts,
hot-film air-mass sensor monitors one for each bank of cylinders.
the density of the incoming air to The catalytic converters are
ensure the optimal air/fuel extremely heat-resistant, yet
mixture, regardless of weather quick to reach temperature from
and altitude. a cold start, assuring good
performance. Twin Lambda
sensors in each of the exhausts
enable continuous monitoring of
Ignition system.
the combustion process. An
The 911 Turbo is equipped with additional pair of sensors is used
a static high-voltage ignition to measure the efficiency of the
system. Each individual plug has catalytic converters.
a separate ignition coil, ensuring
reliable combustion every time.
Servicing.
Our engineers developed the
911 Turbo to deliver peak
performance with minimal service
required. Some examples of their
thoughtfulness include timing
chains that are maintenance-free
for the life of the car, an ignition
system that requires no servicing
beyond fresh spark plugs every
24,000 miles, valves that self-
adjust automatically, and a
self-adjusting belt that drives the
generator, power-steering pump
and air conditioning compressor,
which has an average service life
of over 50,000 miles. Thanks to
excellent filtration and high-
endurance synthetic oil,
oil-change intervals are an
astonishing 12,000 miles.
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The 911 Turbo I Performance
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