Measurement On The Test Stand; Tires And Wheels - Porsche 718 Cayman GT4RS 2023 Owner's Manual

Measurement on the Test Stand

Carrying out test stand measurements
Inhalation of toxic ex-
WARNING
haust gases
Danger of serious or fatal injuries due to inhalation of
toxic exhaust gases.
Exhaust gas contains colorless and odorless carbon
monoxide, which is toxic even in low concentrations.
e
Only perform work with the engine running out-
doors or with suitable extraction systems for the
exhaust gases.
Inadequate securing of
WARNING
vehicle
An unsecured or incorrectly secured vehicle can move
unintentionally or tip or fall off lifting equipment, such
as a jack or lifting platform. This can cause serious
injuries and damage.
e
Raise the vehicle using a jack on a solid and flat
surface only.
e
Raise the vehicle only at the prescribed jacking
points on the vehicle underbody.
e
Always place the vehicle on solid supports when
working under the vehicle.
e
Never start the engine when the vehicle is raised.
Engine vibrations can cause the vehicle to fall.
Performance measurement
Performance measurements on roller-type test
stands are not approved by Porsche.
Carrying out brake tests
e
Only carry out brake testing on roller-type test
stands.
The following limits must not be exceeded:
–
Test speed 4.6 mph (7.5 km/h)
–
Test duration 20 seconds
Carrying out electric parking brake tests
e
Only test the electric parking brake on the test
bench with the ignition switched on and with
the manual gearshift lever in N.
The vehicle switches automatically to the brake test
stand mode in which the electric parking brake can
be tested. A message appears on the multifunction
display in the instrument panel.
Roadside Assistance

Tires and Wheels

Maintain Load and speed
The service life of tires depends on driving habits
as well as the right tire pressure and correct chas-
sis setting. Rapid acceleration, extreme cornering
speeds and hard braking increase tire wear. More-
over, tread wear is increased at high outside temper-
atures and on rough road surfaces.
g Refer to chapter "Technical Data" on page 248.
NOTE
Never use radial and diagonal tires on the vehicle at
the same time
e
Always use the same type of tire.
e
Drive at an appropriate speed.
e
Do not overload the vehicle and check the roof
load.
e
Refer to chapter " Wheels and Tires" on page
252.
217