Rotor/Brake Pad Wear Opinions

[Raptor]

If you cut them to true up the rotor and it is off enough, it will cause an out of balance condition. Then you get to buy new rotors anyway.

[Matt D.]

JET's advice is spot on. EclipseTurbo and Rapor bring up good points as well that you should keep in mind.

Carlos, stop posting in tech threads already...

[LightningGSX]

I've found in most cases, they warp so quickly after being turned, that is not even worth it.It could be my driving though too, I'm hard on brakes

[Raptor]

Drive a lighter car Eric.

[TheBlizzard]

From what I have seen and read in my opinion there is no such thing as a warped brake rotor. If there is it is very rare and more often than not it is merely mis-diagnosed "run-out". This may be way off but I think that in most cases whether on a racing car or a street car, rotors end up failing due to the friction pad material being unevenly transfered to the surface of the rotor. This uneven deposition results in a thickness variation or "run out" due to hot spotting that occured at elevated temperatures.

Getting them turned is not a good idea because the more material you take away, the less material there is for heat dissipation. You may get away with it here and there but what is your time worth? Who wants to keep pulling rotors off and putting them back on when they are fairly cheap to just by new ones.

I think it should also be stressed that your wheel and rotating assembly be balanced and not be uneven. An uneven wheel or a wheel thats mounting surface is uneven with cause undesireable stress on your braking system. A wheel that is not tightened properly could also cause your brake rotors to wear unevenly.

This is just my opinion. Take from it what you want.

CRAIG

[Khadgar]

I don't want o hijack any threads or go off topic but since the original question has been answered I just want to ask a quick question and don't want to start a new thread about it.

Besides the obvious slotting/drilling, is there any difference between rotors or will cheap ones from napa work fine?

[Jakey]

I'd also like to know rotor differences since you can purchase solid, slotted, drilled, dimpled, and a combination of those. I've seen that people have had problems with the slotted rotors cracking but what about drilled or dimpled? Plus the vast number of different brands out there: OEM, Napa, Brembo,AEM, Powerslot, Rotora, etc always makes decision making fun.

[LightningGSX]

I believe its the drilled rotors that crack, not the slotted.Could be wrong though

[Jakey]

Yep, you're right. I stand corrected.
http://www.acquiredperformance.com/CarProjects/2GBrakes/Dscn6151.jpg

[LightningGSX]

From what I have seen and read in my opinion there is no such thing as a warped brake rotor. If there is it is very rare and more often than not it is merely mis-diagnosed "run-out". This may be way off but I think that in most cases whether on a racing car or a street car, rotors end up failing due to the friction pad material being unevenly transfered to the surface of the rotor. This uneven deposition results in a thickness variation or "run out" due to hot spotting that occured at elevated temperatures.

So you're saying the run out is cause by the pads' friction material accumulating on the rotor itself?