If the discs were previously being used with PFC brake pads then the bed-in procedure will be achieved quickly with new PFC pads. Discs previously bedded using a different manufacturer’s pads require a slightly longer process. With brake cooling ducts open and fully functional, perform the following procedures.

1) On the first lap, perform several snubs with progressively higher pedal pressure and braking force and from higher speeds. You will feel the effectiveness of the brakes increase with each successive brake application. This should take six to ten snubs per lap and is usually completed in one or two laps. If non-PFC friction materials were previously run on the discs then this procedure could take as many as three to five laps. This is because the non- PFC friction material transfer layer must first be cleaned from the disc and then a fresh transfer layer must be imparted to the disc.

2) Running additional laps is the best way to accomplish the new transfer layer and, due to the higher surface temperatures, will assure a complete removal of the old friction materials from the disc. Braking effectiveness should be excellent at this point and the car can be driven normally.

Note: Sanding or machine grinding the discs will not decrease the bed-in time. Whenever new PFC brake pads are installed, the time spent taking disc temperatures, tyre temperatures and pressures and a debriefing with the driver is usually a sufficient cool down period.

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