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Thread: Drilled and Slotted Rotors

  1. 9th May 2013, 06:01 PM #1
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    wardy1
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    Drilled and Slotted Rotors

    Whilst having my D2a serviced a few weeks ago it was noted that my front rotors were a bit sus. Went with the AMV recommendation to replace with drilled and slotted ones and WOW! My brakes were always good, and I'd always thought this upgrade was a bit of a **** but I'm a convert!
    Stopping is stronger than ever.
    Going to go for drilled rears at the next service.
    Oh yes, they were only $174/pair.....plus new pads.
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  2. 9th May 2013, 06:30 PM #2
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    Yep,

    Did the same and fitted TRW pads on the front. Very happy.
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  3. 9th May 2013, 06:44 PM #3
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    Just a heads up, Drilled rotors can cause stress fractures around the holes, not sure how common it is but it does happen.
    Hope you enjoy them, about to go through the same process myself
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  4. 9th May 2013, 10:39 PM #4
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    I think slotted rotors are a good thing and do make a difference. However I am not convinced on the drilled part

    As Mr Muppet said, they are prone to stress fractures but on a 4wd they also fill up with mud very quickly.

    The TRW pads made more difference than anything to my brakes, they are great.
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  5. 10th May 2013, 12:59 PM #5
    twr7cx
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    Cross drilled rotors are generally only suitable for a street road car. Most track cars will avoid them due to the fractures that occur. Likewise on 4WD's going off road there can often be issues with stuff getting in there.

    RDA have taken an interesting approach to this. Instead of using drilled out holes they use a combination of the slots and dimples, thus retaining more of the strength. I have these on the rear of my D2a in the gold coating and have a set in the garage for the front. The gold coating helps to prevent corrosion which can be an issue with how often my vehicle is in salt water.
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  6. 10th May 2013, 01:19 PM #6
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    I have DBA T2 slotted discs all round on mine with LR pads. I like them a lot but have noticed that they are a bit noisy under heavy braking. From what I've read this is a pretty common trait of slotted rotors.

    Brakes Direct - DBA528S DBA Street Series T2 Slotted Brake Rotor

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    cheers
    Paul
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  7. 10th May 2013, 04:45 PM #7
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    X2 for the dba slots, they are excellent and are quiet for me, these work very well with Bendix pads.
    Cheers
    Slunnie


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  8. 10th May 2013, 05:47 PM #8
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    About to upgrade to slotted/cross drilled rotors all round this weekend.
    Any pitfalls to watch for or any tips greatly appreciated.
    Thanks
    Andrew
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  9. 10th May 2013, 05:53 PM #9
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    Quote Originally Posted by LandyAndy View Post
    About to upgrade to slotted/cross drilled rotors all round this weekend.
    Any pitfalls to watch for or any tips greatly appreciated.
    Thanks
    Andrew
    It's all straight forward, but I would recommend not getting drilled dur to cracking of the rotor. If you really want that type of thing look at dimpled instead.
    Cheers
    Slunnie


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  10. 10th May 2013, 06:08 PM #10
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    Already here and ready to fit Slunnie.
    Isnt the cracking caused by quenching of the red hot rotor in water???
    Unlikely to happen unless one drives like a rally star off-road.
    Not a hard on the brakes man myself,was told my rotors were close to being needing replacing when I first bought the D2,only needing to do it now at around 80000ks 7 years later.
    The most wear is since chiping/intercooler/exhaust modifications
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