
Originally Posted by
Cuppa
Good stuff, braided line too!
Have you got the bedding on instructions - easy to do, but important I think. I did the x3 for Yellowstuff. Performance noticeably improved whilst out doing it.
When a vehicle has had both new rotors and/or just new pads fitted, there are two processes or objectives, to getting the brake system to operate at optimal performance.
The first step is to make sure the disc face is clean of all oils/anti rust or any foreign matter like previous brake pad material. If the rotors are not being replaced, then it is imperative that the disc is machined, prior to the fitment of new pads- without exception.
The second step is heating (not cooking) the brake rotor and pads, to transfer the pad material evenly, onto the rotor face.
This step involves performing a series of stops, so that the brake rotor and pad are heated steadily, to allow the transfer of pad material onto the brake rotor friction surface. The friction surface should be clear of all oils, which are used to stop the rotor from rusting, before being fitted to the motor vehicle. Whilst these will be burnt off, they risk transferring and possibly polluting the brake pad material and will definitely lead to a longer bedding-in process. Whilst performing a series of brake applications to transfer the pad material, care should be taken to not come to a complete stop, as this can lead to the transfer of pad material unevenly on the disc at the point where the pad comes to rest on the friction surface.
• A typical program of 8-9 brake applications, from 60km down to 10km p/hour, without any cool down in between would be sufficient.
For performance pad materials, a further two sequences of ten stops will be required after a cooling down period between each cycle, to ensure that the pads have reached the required higher operating temperature to allow for the pad material to transfer effectively.*
At all times during the bedding in process, care should be taken to not apply the brakes in a harsh manner or decelerate from high speeds, as this will corrupt the transfer of materials and lead to uneven material build up on the rotor surface, which in most instances will require machining to regain a flat rotor surface for optimal operation (Disc thickness vibration-DTV-which leads to brake judder or vibration-see RDA/EBC Bulletin #1