Porsche 911 TURBO - 1975 WORSHOP, Manual

Page: 105 / 252

Controls, Safety, Instruments
105
General information regarding the
on-board computer functions
Range on remaining fuel
The range on remaining fuel is continuously recal-
culated during the journey based on the fuel level,
current consumption and average consumption.
The more the fuel level falls, the more spontane-
ously the display reacts. For this reason, the range
on remaining fuel is not displayed if it is less than
15 kilometres (9 miles).
If the vehicle's inclination changes while driving or
refuelling, incorrect range information may tempo-
rarily be given.
Note
If the tank is nearly empty and you top up with only
a small quantity of fuel, this cannot be used to
calculate the range on remaining fuel.
Average consumption and average speed
The displayed values are based on the distance
travelled since the last reset to “zero”.
You can set the starting time for a measurement
before or during the trip.
Switching the ignition off does not reset the
measurements. It is therefore possible to collect
values over long periods.
Disconnecting the car battery will cause these
memories to be erased.
Tyre pressure
The Tyre pressure function of the on-board
computer displays the tyre pressures dependent
on temperature in the four wheels. You can watch
the tyre pressure rise and fall while driving.
The display is only for information. To correct the
tyre pressures, always use the displayed values
from the “Info pressure” display in the Tyre
pressure menu.
Engine boost pressure
The engine boost pressure is regulated by the
engine control unit. The maximum boost pressure
is approx. 1 bar (14.5 psi). It is, however, greatly
dependent on the ambient air pressure and the
fuel grade.
f Please observe the chapter “SPORT MODE” on
page 46.