Groove

ValidusVentus

Transferred this out of a different thread and put it somewhere more applicable where I also wouldn't be thread jacking:

At my last track day with the XP10s on the front I was getting pretty thick visible deposit buildup on the rotor surface.. After a while I could definitely feel the rough surface of the rotor in the brake pedal in a few brake zones. Didn't warp or significantly crack the rotors though. I did drive around the paddock for a few minutes after the cooldown lap and pushed my car back and forth a bit after I parked it. Thinking of hacksawing a shallow tangential groove (and filing the edges) into the middle of the XP10 pads since they don't have one (even though I do use slotted rotors) and they do have those 2 small holes which are maybe intended to perform the same function?

Which is why I haven't done it and mentioned it here . It used to be common practice with some race teams (cutting them), (don't know if its still done, I had assumed all race application pads now had them from the factory) in fact Carrol Smith talks about it in his book Tune to Win. The goal is to give the (new and old) brake dust somewhere to go rather than being pushed back into the rotor material by the rest of the pad. This way more of the pad is seeing a clean/clear surface when it makes contact with the rotor. It also helps somewhat with cooling the pad. It doesn't have anything to do with gassing, which is a thing of the past.

Also I don't believe there is anything special about the material at the front or back edge of the pads to begin with so how would adding another front and rear edge do anything bad?

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Mods: Dedicated caged track car, lots of things. ||| Valkyrie Autosport |||