Porsche 911 GT3 -, Brochure

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The new 911 GT3 | Drive
Intake manifold.
The new 911 GT3 is equipped
with a variable intake manifold
with two resonance valves. This
system works in conjunction
with the sports exhaust system,
featuring two central tailpipes,
to achieve optimum cylinder
charging and throughput rates.
In addition to a conventional
distributor pipe, the new 911 GT3
has two resonance pipes with
resonance valves. At low engine
speeds both resonance valves
are closed. At medium rpm,
the first, smaller valve opens.
At high rpm, both valves open.
The system uses the vibrations
in the air caused by the move-
ment of the engine valves
to force air into the cylinders.
The result: higher levels of
power and torque over a wider
engine speed range.
Sports exhaust system.
The lightweight sports exhaust
system in the new 911 GT3
consists of two front silencers,
two catalytic converters and
one rear silencer. The system’s
large volume reduces exhaust
back pressure to increase power.
Each of the two banks of cylinders
has its own separate exhaust
tract. The position and design of
the catalytic converters enable
rapid warm-up to ensure effective
emissions control.
Thanks to its advanced exhaust
technology, the new 911 GT3
meets the strict requirements
of international emissions
standards such as Euro 5 in
Europe and LEV II in the USA.
An oxygen sensor system monitors
both banks of cylinders separately.
Two corresponding oxygen
sensors work in conjunction with
the engine management system
to adjust the air/fuel mixture
individually for each bank of
cylinders.
An additional oxygen sensor in
each exhaust section monitors
the conversion of pollutants in
each catalytic converter.*
What that means for you is more
power – but not at the expense
of the environment.
*Not in markets with leaded fuel.
Intake manifold
Sports exhaust system