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The 911 | Engine
911 Carrera 4
cle arance compensation
rem ains fully functional—a
condition that is crucial to
the power and emissions
characteristics of the engine.
To reduce power losses
and increase efficiency, an
electronically controlled oil
pump supplies oil to the
lubricating points inside the
engine as and when required.
This means that the oil pump
does not work so hard when
there is less demand for
lubricati on. The main bene fit
of an on-demand oil-supply
system is optimal efficiency,
ensuring low fuel consumption
and reduced exhaust emissions.
Single-jet spray nozzles cool
the piston crowns with oil from
the main lu brication circuit—
another detailed solution
that helps to reduce the
thermal load on th e engine.
For the e ngine, all of these
deta iled solutions mean
a consistent supply of oil
regardless of gravi tational
loads, even in the most
demanding track conditions.
Engine cooling system.
DFI and VarioCam Plus enable
a tremendous amount of power
to be produced with reduced
emissions, fuel consumption
and noise. T he same applies to
our efficient cros s-flow cooling
system, as used in motorsport,
where each engine cylinder is
unif ormly supp lied with coolant.
In the 3.8-liter engine, the higher
output demands a corresponding
increase in cooling. The solution
is a more powerf ul coolant
pump and a more efficient
oil/coolant heat exchanger
expan ded by two additional fins.
Ignition.
The ignition system is
designed for static high-
volt age di stribution. Individual
ignition coils on each of the
spark plugs ensure perfect
ignition every time.
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