This is the bedding in process for new Pagid pads. It probably works with other pads too.
However, of most interest to many people is the fact that this process can be used to cure what *feels* like warped discs, but is actually an uneven depositing of pad material on the disc surface. It is felt as an on-off-on-off feeling, which can manifest itself as severe judder at speed.
try it - it might just save you having to buy new discs, and if it doesn't work, you're no worse off.
GUIDANCE ON PAD INSTALLATION
When installing Pagid Racing Brake Pads, we recommend you observe the following:
It is always good practice to clean the surface of the disc to remove any previous pad deposits and contamination.. This is best done by having the discs surface ground,, if this is not possible clean the disc surface with a medium grade emery cloth.. This will all low the new pad to achieve better contact with the grain off the disc surface.. As many high performance friction materials impart a friction transfer layer on the disc surface, this should be cleaned away when new pads are fitted.. This is especially the case when a change off compound is made. Failure to clean the disc surface will result in reduced friction and reduced brake pad life.
MOUNTING NEW PADS ON USED DISCS
When fitting new pads to used discs care must be taken to file the top and bottom edges to 45to allow pads to clear high ridges on disc radius. This will allow the pads to fully contact the disc surface. If the contact area is reduced, hot spots can occur and damage friction material reducing efficiency. If you are changing to Pagid RS pads from another manufacturer, please take care to remove all surface deposits from the disc. If this is not done, bedding in may prove difficult and reduce life and performance of the pads.
BRAKE DISC CONDITIONING (NEW DISCS)
When fitting new discs care must be taken to heat cycle the disc by gradually introducing moderate temperatures into the disc before high temperatures are reached. The introduction of high temperatures into the brake disc too quickly can result in thermal shock causing cracking and disc distortion. Thermal shock can be reduced by also allowing the disc and pad combination to cool gradually after extreme use, and allowing the vehicle to come to a complete stop when the brakes are at extreme temperatures should be avoided. (Holding vehicle in the pit lane on the foot brake). Thermal shock can result from the level of thermal energy applied, or from the rate the heat is applied and removed. Try to keep the energy levels gradual by using warming up cycles and cooling down cycles where possible. This practice will prolong the life of both pad and disc, improve overall brake performance and help to prevent failures.
GUIDANCE ON BEDDING IN PROCEDURE
GEOMETRIC ALIGNMENT OF PAD SURFACE TO DISC SURFACE (BASIC BEDDING IN)
4-6 brake applications with medium pedal pressure from approx 90mph to 50mph, not allowing wheels to lock. (No brake dragging) Allow for a distance of 300 - 400metres between brake applications for cooling period. Pads should not reach temperatures above 400C during initial bedding in. Check that pad surfaces have at least 80% contact with disc before allowing more heat into pad surface. Immediately followed by:
BEDDING IN AT HIGH SPEED
1 brake application with medium to high pedal pressure from approx 110mph to 50mph without allowing wheels to lock. Allow 3-4 recovery brake applications with light pedal pressure. Repeat high speed applications including recovery applications another 2-3 times. Allow a cooling off distance of 500 metres between high speed applications.