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Originally Posted by nj1266
...This clearly explains what you guys call warpping
http://www.stoptech.com/faq/data/faq25.htm
http://www.stoptech.com/faq/data/faq26.htm
As you can see after market brake maker StopTech does not believe in warpped rotors. In the second link, they tell you that turning the rotor is an option to remove un-even pad material, but that will destroy your rotor's rigidity. The better option is to run an aggressive pad that will clean the rotor. |
On
this link Stoptech states, essentially, that warping never happens:
"- I have never seen a warped brake disc. I have seen lots of cracked discs, (FIGURE 1) discs that had turned into shallow cones at operating temperature because they were mounted rigidly to their attachment bells or top hats, (FIGURE 2) a few where the friction surface had collapsed in the area between straight radial interior vanes, (FIGURE 3) and an untold number of discs with pad material unevenly deposited on the friction surfaces - sometimes visible and more often not. (FIGURE 4)
In fact every case of "warped brake disc" that I have investigated, whether on a racing car or a street car, has turned out to be friction pad material transferred unevenly to the surface of the disc. This uneven deposition results in thickness variation (TV) or run-out due to hot spotting that occurred at elevated temperatures."
I have a VERY hard time believing that there has never been a warped rotor since the disc brake was invented. One must be very careful when speaking in "absolutes".
Quote:
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Originally Posted by nj1266
...In the second link, they tell you that turning the rotor is an option to remove un-even pad material, but that will destroy your rotor's rigidity. The better option is to run an aggressive pad that will clean the rotor.
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If turning the rotor to remove the un-even pad material destroys the rigidity, wouldn't the rotor have been "un-rigid" before? Scrubbing the material off with aggressive pads doesn't allow any control of the amount of material being taken off but somehow this is safer than in a machine shop where one has very fine control? (Stoptech adds one caveat to this theory "A WARNING: Do not leave an abrasive pad in the caliper longer than necessary to solve the problem. We have had rotors destroyed in under a week by leaving the abrasive track pads in on the street.")
This isn't making sense to me yet...
"Cornfused"