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Slotted or Drilled Rotors?

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Old 06-11-2003, 05:58 AM
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Default Slotted or Drilled Rotors?

Thought I'd ask the technical experts.
Old 06-11-2003, 05:59 AM
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Slotted. Drilled serves no real purpose with today's brake pads.
Old 06-11-2003, 06:09 AM
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...unless you like the looks of them
Old 06-11-2003, 06:12 AM
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That's why I said "real" purpose.
Old 06-11-2003, 07:30 AM
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Default ...and neither does slotted

both were intended to evacuate gasses produced by heated pad material
Old 06-11-2003, 07:49 AM
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ouch 8^)
Old 06-11-2003, 07:52 AM
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Slotted's purpose is to keep a fresh pad surface with the rotor & to heat up race pads quickly
Old 06-11-2003, 08:30 AM
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Default I don't buy that part

even if they could "shave" the pad face, the edges of the slot would lose their "shaving" ability very quickly.

Primary purpose of slotted rotors were exactly the same as cross-drilled - dissipate heat and evacuate gasses and debris

not sure what fresh pad surface mean - makes no sense to me

BTW, it is very easy to claim "shaving" capacity for drilled rotors as well
Old 06-11-2003, 08:35 AM
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Default Per StopTech:

"StopTech provides rotors slotted, drilled or plain. For most performance applications slotted is the preferred choice. Slotting helps wipe away debris from between the pad and rotor as well as increasing the "bite" characteristics of the pad. A drilled rotor provides the same type of benefit, but is more susceptible to cracking under severe usage. Many customers prefer the look of a drilled rotor and for street and occasional light duty track use they will work fine. For more severe applications, we recommend slotted rotors."
Old 06-11-2003, 08:36 AM
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Default Heat and deposits glaze the pad surface, the slots wipe that off...

...I've used both smooth and slotted rotors, and can tell you that the pad surface looks "cleaner" when used with slotted rotors, but that I also think I cook my brakes easier (not having any brake ducts) with slotted rotors due to the increased temperature the slotted rotors run, even though that did mean a more consistent application of brake force when cold due to the more rapid increase in brake pad surface temperature.


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