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PFC pads I find take a TON of heat before they bed though FYI, where the XP tend to bed very quickly. The PFC will be erratic in its response until it beds. If you drive the PFC too long without bedding the pad tends to soften and not function well. heat it slow, then get it hot, then let it cool :-)
make sure you roll the car in teh paddock so they dont stay hot in one rotor position.