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While that may be true in some instances, I have seen plenty of rotors that are actually warped as a professional automotive tech. In the Honda world the 09-15 pilots and 12-17 odysseys constantly have rotors warping. The exact reason I am unsure, but I speculate it had something to do with the front and rear brakes being undersized for the vehicles. Front's being undersized allowing for a greater build up of heat in the rotors and rears being undersized causing the fronts to work harder. For the odysseys Honda even updated the rotor design for improved cooling.
 

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We had a Dodge Caravan that ate pads and rotors every 25K miles. Now my wife has a Mustang convertible and it’s large brakes last almost forever.
 

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Discussion Starter · #28 ·
While that may be true in some instances, I have seen plenty of rotors that are actually warped as a professional automotive tech. In the Honda world the 09-15 pilots and 12-17 odysseys constantly have rotors warping. The exact reason I am unsure, but I speculate it had something to do with the front and rear brakes being undersized for the vehicles. Front's being undersized allowing for a greater build up of heat in the rotors and rears being undersized causing the fronts to work harder. For the odysseys Honda even updated the rotor design for improved cooling.
I don't doubt that both conditions may happen, but as I said, the preferred solution is the same regardless - replacement of the rotors.

There's some good info on bedding the brakes in the article, though, to minimize the occurrence of the build-up problem.
 

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slotted or holes help dissipate the heat quicker
Actually they don't, you have removed mass from the rotor with the holes/slots. It's the mass of the rotor that helps absorb and dissipate the generated heat.

Unless your driving a Nascar you will not see any benefit from those openings, they may look cool, but they are of no benefit!
 

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I've been looking for brake pads and rotors for a friend, and I see O.E. rotors, and the supposedly "upgrade" ones that have drilled holes and/or slots for only a few bucks more. Are the drilled or slotted rotors really any better?
What kind of vehicle do you have and what type of driving do you do. There is no need at all for slotted rotors for a standard driver. It is just a "bling" sort of thing for some drivers and since I drive a variety of Jaguars, I have found no need for them. I would spend the money an quality pads like Pagid or the like and that will give you better brake performance.

TBB
 

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Discussion Starter · #34 ·
Rotors do warp... I have resurfaced hundreds of rotors because of warping as a mechanic.
Not trying to start a fight. You're sure that these hundreds are rotors were actually the same thickness face to face at all locations, but 'shifted' forward and back as they went around? They weren't actually thicker in some areas than others?
 

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Not trying to start a fight. You're sure that these hundreds are rotors were actually the same thickness face to face at all locations, but 'shifted' forward and back as they went around? They weren't actually thicker in some areas than others?
All I know is that they were in fact warped and resurfacing them cured their shaky steering wheels while braking afterwards. I've been repairing and maintaining cars and trucks for over 45 years now.
 

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All I know is that they were in fact warped and resurfacing them cured their shaky steering wheels while braking afterwards. I've been repairing and maintaining cars and trucks for over 45 years now.
If they were truly warped you would have to take a lot of surface material off and that is the opposite of what one wants with a rotor.
 

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Discussion Starter · #39 ·
All I know is that they were in fact warped and resurfacing them cured their shaky steering wheels while braking afterwards.
So you're saying you never measured the thickness of the rotors, you just machined them until the faces were flat? If that's the case, you don't really know if they were warped or just thicker in some areas.
I've been repairing and maintaining cars and trucks for over 45 years now.
Good for you. Many others could claim the same. That doesn't prove that you're right. Since machining the rotors works for either problem, the fact that maching the rotors resolved the issue is not evidence that your assumption of the cause is correct.
 

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As far as my replacing rotors with drilled and slotted, I find they work a little better. I'm not racing around too much also.
So you're saying you never measured the thickness of the rotors, you just machined them until the faces were flat? If that's the case, you don't really know if they were warped or just thicker in some areas.

Good for you. Many others could claim the same. That doesn't prove that you're right. Since machining the rotors works for either problem, the fact that maching the rotors resolved the issue is not evidence that your assumption of the cause is correct.
Seriously???
 
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