2012 Lexus LFA brake rotor

52
■
■Brake caliper
The LFA features front 6-piston and rear
4-piston aluminum alloy monoblock
calipers with dif ferential piston bore
sizing. This design takes advantage of
what is known as the 'self-servo effect',
allowing pressure from the unequally
sized pistons to push the pad against the
rotor in a progressive pattern, with the
leading piston applying the least force
and the trailing edge applying the most.
This wedge shape uses the rotational
movement of the disc to help the brake
p a d s ' b i t e ' i n t o t h e d i s c w i t h m o r e
effective pressure distribution, optimized
pressure equalization that helps realize
a more consistent supply of stopping
power. The LFA also features track-bred brake cooling ducts in the front bumper and
aerodynamic under covers designed to channel fresh, cool air to the brake system.
Each brake caliper piston (Front: 12
Rear: 8) employs a thermally insulated
aluminum construction with cooling
holes to help prevent the brake fluid from
boiling for enhanced high-temperature
endurance.
Parking brake calipers have been adopted
in order to lower vehicle weight. A switch-
operated EPB (Electric Parking Brake)
function has been adopted.
1.50 in. (38 mm)
1.26 in. (32 mm)
1.10 in. (28 mm)
1.10 in.
(28 mm)
1.18 in.
(30 mm) Front brake caliper
Rear brake caliper Aluminum brake caliper
piston
T h e r m a l l y i n s u l a t e d
c o n s t r u c t i o n w i t h
cooling holesBrake pad side
The shape of the cooling ducts in the
front bumper and contours of the under
covers have been designed to direct
cool air directly at the brake discs.

53
Braking
■
■Brake discs
Each brake disc is made from CCM (Carbon Ceramic Material) and features a two-
piece floating construction with an aluminum center hat. With this construction, disc
deformation due to expansion at high temperatures is more effectively mitigated;
thereby enabling a more consistent application of pressure from the brake pads for
stable and confidence-inspiring brake performance under any circumstances.
CCM discs provide the high stopping

power and thermal capacity needed
to provide consistent braking at high
speeds.
The discs are impregnated with silicone
material to ensure outstanding stopping
power and endurance when they are not
yet at optimal operating temperature or
in wet conditions. However, one should
avoid spraying water directly onto a hot
brake disc. Fur thermore, CCM discs
are susceptible to microscopic cracking
and local damage resulting from a direct
impact. Care is required when installing a
tire and wheel as accidental contact may
result in damage.

Bedding-in new brake pads or rotors:
In order to ensure maximum performance from a set of replacement CCM discs
or brake pads, it is necessary to bed them in. Please consult your Lexus dealer
regarding the appropriate bedding procedure. The LFA is shipped from the factory
with pre-bedded CCM discs and brake pads.
The disc diameters are 15.35 in. (390
mm) for the front and 14.17 in. (360 mm)
for the rear. Both front and rear discs are
ventilated with 0.20 in. (5 mm) diameter
d r i l l e d c o o l i n g h o l e s . T h e a d o p t i o n o f
CCM as opposed to conventional cast-iron
results in a reduction in unsprung weight of
approximately 11.03 lb. (5 kg) per wheel.

112
Brake and Tires
Brake Calipers FrontOpposed 6-piston monoblock
Rear Opposed 4-piston monoblock
Brake Rotors CCM
(Carbon Ceramic Material)
Brake Rotor (diameter) Front
f390 mm x 34V
Rear f360 mm x 28V
Brake System ECB
(Electronically Controlled Brake)
Brake Fluid Type FMVSS No.116 DOT3
Brake Fluid Capacity RHD1.2L (1.3 qt., 1.1 lmp. qt)
LHD 1.1L (1.2 qt., 1.0 Imp. qt.)
Parking Brake EPB (Electric Parking Brake)
Wheel Size Front20 x 9.5J +45
Rear 20 x 11.5J +45
Tire Size Front265/35ZR20 (95Y)
Rear 305/30ZR20 (99Y)
Suspension Type FrontDouble Wishbone
Rear Multi-link
Steering Gear Type Rack and Pinion
Steering Gear Ratio 14.3
Lock to Lock 2.35
Power Steering Type EPS (Electric Power Steering)
Stability control VDIM (Vehicle Dynamics
Integrated Management)
Electrical System
Battery Size S75D31R
Voltage & Amp.hr. (5HR) 12V-56AH
Alternator Output 2,640 W
Starter Output 1.7 kW

114
Index
AAccelerating 32
Accelerator pedal mechanism 32
Active rear wing (maintenance) 80
Active rear wing
(manual operation) 80
Active rear wing (operation) 28
Adding fuel 12
Adding gasoline 12
Adding petrol 12
Adjusting the steering wheel
position 23
Advice for long-term storage 92
Alcantara® care 85
Alcantara® cleaning 85
Alcantara® maintenance 85
Alignment 47
Aluminum center hat 53
Analog gauge 59
Approach angle 100
AUTO mode 58
AUTO mode
(control characteristics) 26
AUTO mode (selection) 27
Automated car-wash 79
Automatic 41
Automatic downshift control 40
BBack door 12
Backing up 11
Battery
(vehicle long-term storage) 93
Battery dark current 93
Battery terminal disconnection 99
Bedding-in new brake pads
or rotors 53
Blipping control 40
Bonnet 12
Bonnet stay 12
Boot 12
Brake caliper 52
Brake discs 53
Brake override system 50
Brake pad bedding 53
Brake pad bed-in 53
Brake pad replacement 53
Brake pedal 51
Brake rotors 53
Brake system 50
Braking 50
Break-over angle 100
Brightness 67
CCarbon fiber care 86
Carbon fiber cleaning 86
Cardan shaft 38
CCM (Carbon Ceramic
Material) discs 53
Ceramic brake discs 53
Ceramic brake rotors 53
CFRP (Carbon Fiber Reinforced
Plastics) maintenance 86
Changing gears 36

116
Engine response 56
Engine speed control 40
Engine speed limiters 16, 17
Engine starting restrictions in
extremely low temperatures 17
“ENGINE START” switch 9
Engine switch 9
Engine type 16
EPB (Electric Parking Brake) 52
EPS (Electric Power Steering)
system 44
Exterior care 78
Exterior maintenance 78
FFlat bed transporting 100
Flat-bottomed steering wheel 45
Floating disc 53
Floating rotor 53
Floor mat usage 22
Floor-mounted brake pedal 51
Front brake caliper 52
Front brake rotor 53
Front counter gear 38
Front disc 53
Front rotor 53
Front suspension 47
Fuel 63
Fuel filler door 12
Fuel filler door manual unlock 95
Fuel gauge 63
Fuel level units selection 67
Fuel tank 63
Fuel tank cap 12
Fuel tank volume 12
Fuel type 12
Fuelling up 12
Fuse 93
GGas 63
Gas filler door 12
Gas filler door manual unlock 95
Gas level units selection 67
Gas tank 63
Gas tank cap 12
Gas tank volume 12
Gas type 12
Gauge 57
Gauge cluster 57
Gauges 57
Gear selection 36
Genuine leather maintenance 84
HHandbrake 9
Heel stopper 22, 51
Hood 12
Hood stand 12
IIdeal driving position 17
If the vehicle battery is discharged 94
Ignition switch 9

118
NNeedle 67
Negative battery terminal
structure 99
NORMAL mode 58
NORMAL mode
(control characteristics) 26
NORMAL mode (selection) 27
OOil change interval 67
Oil inspection 67
Oil level 67, 68
Oil level gauge 68, 69
Oil level sensor 68
Oil Maintenance 67
Oil pressure sensor 62
Oil replacement 67
Oil tank 68
Oil temperature sensor 61
Operating the driving mode
selector switch 26
Optimum driving position 20
Outer rear view mirror switches 9
Outside rear view mirror switches 9
Overall gear ratio 46
Over-rev 70
PPaddle shift switches 40, 4 1
Paddle shifters 40, 41
Parasitic current (dark current) 93
Parking 11
Parking brake 9, 52
Parking brake (vehicle long-term
storage) 92
Parking brake calipers 52
Parking brake switch 9
Partition glass care 87
Partition glass cleaning 87
Partition glass maintenance 87
Peak-hold 67
Pedal anti-slip pattern 51
Pedal texture 51
Petrol 63
Petrol filler door 12
Petrol level units selection 67
Petrol tank 63
Petrol tank cap 12
Petrol tank volume 12
Petrol type 12
Polycarbonate resin glass
maintenance 87
Powertrain 56
Propeller shaft 38
RRack and pinion gearbox 46
Rear brake caliper 52
Rear brake rotor 53
Rear disc 53
Rear hatch 12
Rear hatch access 95
Rear hatch manual unlock 95
Rear quarter window care 80

119
Index
Rear quarter window cleaning 80
Rear rotor 53
Rear suspension 47
Rear wing (operation) 28
Rear wing cleaning 80
Rear wing manual operation 80
Rear-mounted transaxle 39
Red zone 59, 70
Refueling 12
Regarding launch control 33
Regarding suspension
adjustments 47
Regarding the brake override
system 50
Remove the fuse 93
Response 56
Restricted maximum engine
speed during break-in period 17
Restricted maximum engine
speed in extremely low
temperatures 17
Restricted maximum engine
speed in neutral gear 17
Rev counter 57
Rev Indicator 67 , 70
Rev limiters 16
Rev Peak 67 , 71
Reverse selector switch 9
Reversing 11
Ride height 47
RPM peak-hold 67
RPM/Rev memory indicator 71
RPM/Rev memory needle 71
SScrub radius 47
Seat adjustment 21
Seat adjustment range 21
Seat angle adjustment 20
Seat cushion front edge height
adjustment 21
Seat forward/backward slide
adjustment 21
Seat height adjustment 21
Seat position 20
Seat slide adjustment 20
Seat switch 10
Seatback angle adjustment 21
Seatback reclining angle
adjustment 21
Selecting a driving mode 27
Settings 67
Shift down 40
Shift paddles 40, 4 1
Shift shock 41
Shift speed 41
Shift speed selector 41
Shift up 40
Shifting 36
Side mirror switches 9
Spare tools 100
Special selection color
“Matte Black” 81