Slotted or drilled rotors
Discussion
Grooved good (within reason, don't go covering the thing with grooves). 4 or 6 is probably all you need.
Drilled is pretty but extremely bad news if your brakes are going to be worked hard. They form stress raisers which can lead to cracking and eventually disc failure. (I've had drilled discs get to the point they were unsafe, I know several others with similar problems and some that have actually fractured in use.)
Drilled is pretty but extremely bad news if your brakes are going to be worked hard. They form stress raisers which can lead to cracking and eventually disc failure. (I've had drilled discs get to the point they were unsafe, I know several others with similar problems and some that have actually fractured in use.)
Hi,
There are numerous benefits to deep cryo tempering of brake rotors. This tempering allows the carbons to better impregnate the lattice structure between the atoms of steel/iron as well as realigning te lattice structure itself. This in turn hardens the rotors extending their life and relieving the stress risers which give way to warping and ctacking. Because the rotors are harder, your pad's life will also be extended because the rotors will be less prone to grooving which causes uneven and accelerated wear to the pads. Also, because the hardened rotor retain more mass over time, they are more efficient heat conductors, which is really their primary purpose.
A few caveats, there are many cryo treating companies out there, but they are not all equal by any means. You want one who will slowly reduce the temps and also keep the parts at -300° for at least 50 hours. Then they should bring the temps up slowly over at least 12 hours. Finally, the best firms also add a heat tempering to the final product. Figure about $60/rotor. Sounds like alot, but can extend rotor life by as much as 300%, not to mention added pad life and more efficient braking.
It's not recommended to treat used rotors and the best firms will not do this as micro-cracking has most probably already occured. Hope this helps. Hapy Motoring!..Jim'85TE
There are numerous benefits to deep cryo tempering of brake rotors. This tempering allows the carbons to better impregnate the lattice structure between the atoms of steel/iron as well as realigning te lattice structure itself. This in turn hardens the rotors extending their life and relieving the stress risers which give way to warping and ctacking. Because the rotors are harder, your pad's life will also be extended because the rotors will be less prone to grooving which causes uneven and accelerated wear to the pads. Also, because the hardened rotor retain more mass over time, they are more efficient heat conductors, which is really their primary purpose.
A few caveats, there are many cryo treating companies out there, but they are not all equal by any means. You want one who will slowly reduce the temps and also keep the parts at -300° for at least 50 hours. Then they should bring the temps up slowly over at least 12 hours. Finally, the best firms also add a heat tempering to the final product. Figure about $60/rotor. Sounds like alot, but can extend rotor life by as much as 300%, not to mention added pad life and more efficient braking.
It's not recommended to treat used rotors and the best firms will not do this as micro-cracking has most probably already occured. Hope this helps. Hapy Motoring!..Jim'85TE
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