T
TripleTransAm
Guest
mtnh said:
Yes, I've heard of this, but I honestly think you REALLY have to heat the buggers up to get them to warp that bad only from holding the brakes on the same spot too long.
Within 2000 miles of purchase (brand new), my 1998 T/A's front rotors were warped already. And I *KNOW* I took it easy on the car while it was new. This was due to the dreaded 'torque' warpage that has been mentioned here, I believe they came improperly torqued from the factory.
On the other hand I then also proceeded to enjoy repeated lapping (road course) sessions and lots of 1/4 mile action (drag strip), once the rotors had been cut slightly. I never really paid much attention to proper cooldown, and eventually they did warp again after one particularly heavy hot-lapping session at the drag strip (repeated 1/4 miles over and over and over and....).
One other theory I've heard of is that excessive brake pad material gets 'burned' onto the rotor and the pulsations are similar to that of a warped rotor. This *may* be something valid, as I recall going into a lapping session with slightly-pulsing brakes, but finishing the event with totally smooth brakes once again. Now, I seriously DOUBT my T/A has enough clamping force to shave a couple of mils of metal off a thick 12 inch rotor!! So maybe there's something to this brake material thing...