Radical Sportscars SR3 XX, Owner'S Manual, Page: 19 / 56

19 QD163-1
3.2 BEDDING IN THE BRAKES
This procedure should be followed each time new discs are fitted to your car:
o The brake ducts should be ¾ blanked off in order to allow the brakes to warm up through the bedding in
period, previously bedded pads should be used if possible.
o 3 lap run - use the brake lightly (<20bar application) on the slow down lap and allow brakes to cool for
5 mins (be sure to not sit stationary in the pits with the brake pedal depressed)
o Next run 5 laps increase brake pressure to build up temperature in the discs (with a peak of around
40bar). The braking potential of the car will start to fade and any potential vibration will surpass; this is
a sign that the bedding procedure is complete.
o
disk becoming aligned for the first time; this is not a process that can be simulated in the build of the car.
It is therefore very important that if the driver feels they have brake judder during this first full heatcycle
they continue to build up brake pressure and heat in the disk. Do not decrease pedal pressure, to do so
has the potential to make the vibration worse.
o Complete a cooling down lap with moderate brake pressure before stopping the car. Allow the brakes to
cool for 15 minutes. Do not apply brakes whilst stationary during the cooling down period.
o We strongly advise AP Racing thermal paint is used; if so, then only the green paint (430°C) should have
fully turned to white and the orange will have slightly turned (560°C) on the outside edges of the discs
during the bedding procedure. If fitted, brake pressure sensors can be used to monitor the bedding in
procedure.
I M P OR T A N T N OT ES
With cast iron discs, brake pressures should not exceed 20bar during the out lap, even with pre-bedded
discs. This is to prevent heat shocking which causes the discs to crack, this occurs when the disc is taken from
ambient temperature up to 600°C very rapidly such as heavy braking on the out lap. When stationary never
hold pressure on the brake pedal, this can cause warping and/or the discs and pads to bind.