#28273, "RE: Slotted rotor dilema?" In response to In response to 6
Originally posted by Silv Blt
Originally posted by ForceFed420a
Originally posted by shazow1969 (for the life of me I can't remember the term we use to describe this happening
Isn't it called a "boundry layer"? Brian
It's commonly refferred to as "glazing". The "glue" that holds cheap organic pads together will melt when you ask too much of the brakes. This creates a gas that will effectively act as a lubricant between your brake pads and your rotor. I had it happen a few times with the stock brake system on my Eclipse. It scared the shit out of me since I came about a foot and a half from rear ending somebody on the highway in a sudden stop situation. I knew that upgrading to better pads can reduce the chances of that happening, but I decided to splurge a little and replace my fairly scored rotors with new cross drilled ones instead of having them turned. I've yet to feel the slightest bit of glazing with my new brakes, and I've given them a 125-25mph test.
Hmm, interesting. I guess it was my understanding that everytime you have heavy braking you create gases. However, these are not huge amounts of gas, and are evacuated by the slots (if you are equipped as such) and thus not a problem. If you don't have slots, the gases have the potential to create this "layer" between the rotor and the pad effectively "aquaplaning" for lack of a better term. This creates pad fade as the pad reaches beyond its thermal capacity and creates gases from the binding agents in the pad. I understood this to be the first "stage". However, if you continue to use the brakes for extended periods of high duress, then they glaze as you described above. Am I incorrect in anything?
Brian
Red 97 Eclipse GS (420a) MTX Custom Garrett T3 Turbo system Megasquirt w/52 lb/hr injectors & a Walbro 255 Kicker/Alpine Audio (3 amps, 2 subs) 90 Cav 2.2 TBI auto (winter) <- yeah, it's fast
