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[Matt0987]

FMTRVT,

"Former Vehicle Test Manager - Friction Products"

With what company(ies)?

"The rotor situation has just gotten way overblown. People and mechanics keep using the term “warping” and equate the supposed “warp” to heat when in fact it has nothing to do with this."

I have read this, and other, posts of yours and I am still confused. Would you mind reviewing this warping again?

I have been told that the pulsating we sometime feel is warping. And, I had a regular problem of this pulsating on my Ex. With factory pads and "OEM" A/M pads. Each time I replaced the pads the rotors were turned and there would be no problem until the next time I used the brakes at the high end of use. Not a panic stop. Not where I activated the ABS. But when I would have to go from, for example, 70 to 50 under a controlled, but quick, firm, slowing. Or, as I am traveling down a hill at 40 and have to slow under a quick, firm, slow to a stop. Usually w/in the first 1000 miles of use. It did not happen sooner because, knowing of the condition, I would baby the braking system so as not to cause this "warping" to happen. Which, I believe, is not how the system should work, BTW. Then, once done, it is there until the next time I change the pads and, at that time, I have the rotors turned. Because I know that the warping will happen again and I do not have the time, nor inclination, to remove the rotors, have them turned, and reinstall them each time the "warping" occurs. Only to have them "warp" again.

So, I purchased drilled/slotted rotors and I have not had the issue since. I thought it was because of the reduction of the gases between the pad and the rotor along with better cooling aspects of a drilled and slotted rotor.

One more question..... How does one know the different quality of the products we are considering purchasing beyond the purchase price. I have learned in my life that purchase price does not necessarily guaranty quality. Without going to the local auto store and dragging the rotors, one by one, onto the floor and checking them for size and fit. Without taking the pads to a belt sander to see how long they will last or if they will squeal.

I have taken my vehicles to dealerships only to have a problem because an apprentice did the work and the work was done worse than I did. I have purchased various products from various sources in my life. I have even had an account- at one point- where the auto shops purchased the products they used. But I would still be purchasing products on a hope and a prayer that I was making the proper decision(s).

In regards to brakes rotors and pads, and keeping in mind that OEM from the dealer did not resolve my "warping" problem, how do we know that we are buying the product that we need for our application and use?