Porsche 911 GT3 Brochure page 9

The new 911 GT3 | Drive
Perhaps the clearest evidence of our core values.
The engine.
Powering the new 911 GT3 is a The new 911 GT3 reaches
water-cooled six-cylinder Boxer 100 km /h (62 mph) in just
engine with four-valve technology 4.1 seconds, with a top speed
and enhanced VarioCam variable of 312 km /h (194 mph).
valve timing (page 24). It gener- The weight-to-power ratio is
ates 320 kW (435 hp) from a 3.2 kg per hp and the new
total displacement of 3,797 cm 3 . engine provides an output of
The maximum torque is 430 Nm. 115 hp per litre.
The maximum engine speed is
8,500 rpm.
In short: the popularity of the new
911 GT3 is assured due to this
increase in power, yet similar fuel
consumption.
This efficiency is demonstrated
by the vehicle's compliance with
the stringent requirements of
the Euro 5 emissions standard.
3.8-litre Boxer engine
A consistent supply of oil to the
engine, even at times of high
lateral acceleration, is ensured by
a dry sump lubrication system
(page 24) with an external engine
oil reservoir. The oil is cooled by
an oil-water heat exchanger. Both
of these systems have proven
themselves on the racetrack.
An extremely lightweight titanium
connecting rod and lighter pistons
reduce oscillating masses, thus
ensuring dynamic engine speed
360
340
320
300
280
260
240
220
200
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100
80
60
40
20
0
1000 2000 3000 4000 5000 6000
Engine speed (rpm)
development. The inlet and
exhaust valves are actuated by
extremely lightweight tappets
and hydraulic valve clearance
adjustment. This enables a maxi-
mum engine speed of 8,500 rpm
which, together with the short
sporty gear ratios, provides
plenty of performance potential.
Added to this is a variable intake
manifold with two resonance
valves (page 26) which work
together with the sports exhaust
· 21 ·
640
620
320 kW (435 hp)
600
580
560
540
520
500
480
460
430 Nm
440
420
400
380
360
340
320
300
280
7000 8000 9000
911 GT3: 430 Nm at 6,250 rpm, 320 kW (435 hp) at 7,600 rpm
system to ensure efficient cylinder
charging and high throughput
rates. The large volume of the
exhaust system supplements the
low-resistance intake manifold
to improve cylinder charging and
increase performance.
The development of the new
engine. A challenge as always.
Which is why it is proof of our
core values.