Alfa Romeo Giulia-GTA, Owner'S Handbook Manual

Page: 276 / 284

TRACK USE
274
RIMS AND WHEELS
TYRE WARM-UP PROCEDURE FOR
TRACK DRIVING
To warm up the tyres, proceed as
follows:
with the tyres cold, inflate the 265/30
ZR20 front tyres to the nominal pressure
of 33.3 psi (2.3 bar) and the 285/30 ZR20
rear tyres to the nominal pressure of
30.4 psi (2.1 bar).
drive 3.7 miles (6 km) on the track at
cruising speed of 62 mph - 93 mph (100
km/h - 150 km/h), zig-zagging slowly;
drive 3.7 km (6 km) on the track at high
speed of 93 mph (150 km/h) (the slow zig-
zags are optional in this case and are not
necessary in hot summer weather);
check the temperature of the tyres: it
must be between 122°F (50°C) and 176°F
(80°C). If the temperature is higher, the
tyre warm-up procedure has not been
performed correctly (overheating) and
the car will not perform at its best.
SINGLE TRACK DRIVING SESSION
(Handling after warm-up - entry to
circuit)
Proceed as follows:
set the tyre pressures at the nominal
values; 33.3 psi (2.3 bar) for 265/30 ZR20
front tyres and 30.4 psi (2.1 bar) for
285/30 ZR20 rear tyres;
do 2 laps of the track at top speed
(normally the first or second lap is the
best lap) and then 1 lap of the track at a
lower speed.
END OF THE TRACK DRIVING SESSION
At the end of the track driving session,
proceed as follows:
check the tyres for damage and wear;
with the tyres cold, inflate the 265/30
ZR20 front tyres to the nominal pressure
of 33.3 psi (2.3 bar) and the 285/30 ZR20
rear tyres to the nominal pressure of
30.4 psi (2.1 bar).
TYRE TEMPERATURE
When measuring tyre temperature, bear
in mind that:
over 230°F (110°C) the tread must
be inspected: risk of loss of pieces of
rubber, surface bubbles, large cracks;
over 257°F (125°C) suspend the tyre
warm-up procedure and change the
tyres.