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The 911 | Engine
911 Carrera 4
cle arance compensation
rem ains fully funct ional—a
condition that is crucial to
the power and emissions
characteristics of the engine.
To reduce power losses
and increase efficiency, an
electr onicall y controlled oil
pump supplies oil to the
lubrica ting points inside the
engine as and when required.
This means tha t the oil pump
does not work so hard when
there is less demand for
lubrica tion. The main be nefit
of an on-de mand oil-supply
system is optimal efficiency,
ensuring low fuel consumption
and reduced exhaust emissio ns.
Single-jet spray nozzles cool
the pi ston crowns with oil from
the main lubrication circuit—
anot her detailed solution
that helps to reduce the
ther mal load o n the engine.
For the engine, all of these
detailed solutions mean
a consistent supply of oil
regardless of gravi tational
loads, even in the most
demanding trac k conditions.
Engine cooling system.
DFI and VarioCam Plus enable
a tremendous amount of power
to be produced with reduced
emissions, fuel consumption
and noise. The same applies to
our efficient cross-flow cooling
system, as used in motorsport,
where each engine cylinder is
uniformly supplied with coola nt.
In the 3.8-liter engine, the higher
output demands a c orresponding
increase in cooling. The solution
is a more p owerful c oolant
pump and a more efficient
oil/coolant heat exchanger
expanded by two additional f ins.
Ignition.
The ignition system is
designed for static high-
voltage dist ributio n. Individual
ignition coils on each of the
spark plugs ensure perfect
ignition every time.
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