Quote:
Originally posted by rdrr
Having said all that, I experience the same symptoms at track days as you, i.e. nice firm pedal after bleeding, but after the first track session the pedal feels soft at the start of the second session, firming up as the brakes get hot. I will be interested to hear what might be causing it.
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I think the key is that the pedal isn't firming up as the brakes get hot, but firming up as the airflow starts to cool down the calipers. The rotors themselves ARE getting hotter again, but there is enough heat dissipated by the moving air to more than compensate.
If this theory is true there must be many, many drivers out there who have experienced this. Perhaps it doesn't happen as readily to cars with larger, cross-drilled discs and hubungous calipers?