Porsche 911 Turbo User Handbook Manual page 19

Guide vanes closed Guide vanes closed
Guide vanes open Guide vanes open
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4
5
8
6
9
2
7
3
10
1. Turbine casing 5. Guide vane adjuster
2. Movable guide vanes 6. Compressor casing
3. Turbine wheel 7. Compressor wheel
4. Electric motor for guide
vane adjustment
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When the boost pressure reaches
its maximum value, the guide vanes
are opened further. By varying the
vane angle, it is possible to achieve
the required boost pressure over
the entire engine speed range.
As a result, there is no need for
1
excess-pressure valves as found
on conventional turbocharged
engines.
Engine performance can be further
enhanced by selecting 'Sport'
mode on the optional Sport Chrono
Package Turbo (see page 70).
Under full acceleration, the boost
is temporarily increased by
approximately 0.2 bar. During this
phase, the engine develops as much
as 60 Nm of additional torque.
Matching the exceptional perform-
ance of the car is the efficiency
8. Recirculation valve with which it is generated. Despite
9. Oil inlet the increase in power and torque,
10. Coolant inlet the 911 Turbo models achieve a
further reduction in fuel consumption.
911 Turbo | Drive
380 860
353 kW (480 bhp)
360 820
340 780
320 740
300 680 Nm 700
660
280
620 Nm
260 620
240 580
220 540
200 500
180 460
911 Turbo models
160 911 Turbo models overboost
420
140 380
120 340
1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500
Engine speed (rpm)
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