Materials to Maintain Your ZHP IIIII Hand Protection IIIII Tools to Maintain Your ZHP
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  1. #1
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    Slotted vs. drilled

    So I understand the reasons behind slotted and drilled rotors, but not the differences (if any?) between the two. To met it seems just looks between slits, holes our both combined. Maybe someone can enlighten me?

    I'm doing 4 wheel brakes on my ///M soon, going with stoptech slotted rotors, and after reading the thread on their street performance pads, they're in the mix with pbr/axxis pads.

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  2. #2
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    Slotted generally is better from a reliability standpoint.

    Drilled rotors are known to have the potential for cracking under track use. It also makes a difference if it's cross drilled or cast drilled. Cast I believe is more durable, but still carries the risk.

    With slotted, you have more surface area, which is better for cooking. There are no holes that would otherwise compromise the integrity of the rotor.

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  3. #3
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    But drilled looks so
    In the market for an E90 M3

  4. #4
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    Quote Originally Posted by az3579 View Post
    Slotted generally is better from a reliability standpoint.

    Drilled rotors are known to have the potential for cracking under track use. It also makes a difference if it's cross drilled or cast drilled. Cast I believe is more durable, but still carries the risk.

    With slotted, you have more surface area, which is better for cooking. There are no holes that would otherwise compromise the integrity of the rotor.

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    I want going to mention it, to see if it came up. I havent heard "prone" but all stories of cracking I have heard were of cross drilled. So that reassures me somewhat. Mostly what I had guessed.

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    Last edited by sketchyd; 08-16-2013 at 06:58 PM.

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  5. #5
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    Quote Originally Posted by sketchyd View Post
    I want going to mention it, to see. I havent heard "prone" but all spirits if cracking I had heard were of cross drilled. So that treasure me somewhat. Mostly what I had guessed.

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    Wow, I really can't read through that autocorrect. Lol

    Sent from my DROID RAZR HD using Tapatalk 4
    BP
    2005 330i ZHP / 6MT
    Imolarot / Naturbraun
    2003 330iT / 6MT
    Orientblau / Naturbraun




    It's not the car you drive, it's how you drive it.

  6. #6
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    Quote Originally Posted by az3579 View Post
    Wow, I really can't read through that autocorrect. Lol

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    X2 I think he's trying to communicate.

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    In the market for an E90 M3

  7. #7
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    what the H
    - Stuart


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  8. #8
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    btw - slotted (I have had both and found the slotted to perform better)
    - Stuart


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  9. #9
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    In my opinion, slotted will give you better reliability. I've been told by several SCCA driver/car owners that cross drilled are nice for the brake gas relief (big cause of brake fade) and reduction of weight but, they warp and crack easily as well as increase the wear on your brake pads. Slotted rotors will get you nearly the same amount of brake gas diffusion without reduced issue of warping, cracking, and pad wear.
    19" VMR VB3 CSL reps w/ General G-Max 3 A/S, BMW Performance short throw shifter, CDV delete, M54B30 swap, and a redneck CAI.

  10. #10
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    Whoops, fixt

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