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Old 03-25-2017, 02:58 PM
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Slotted rotors - any *real* issues?

Hey, I want to replace the brakes and rotors on my jk. My problem is that I am *very* limited as to where I can purchase them. Currently, Amazon is the only website that can actually clear customs where I live, which leaves me with a very small selection.

Of that selection I'm interested in ebc gd7447 and 7446:
https://www.amazon.com/gp/aw/d/B002Y...KIKX0DER&psc=1

Those are slotted but but not drilled (solid ones are not offered). I've read that slotted rotors are not recommended - is this true or can I order those? I know TF make a slotted set, so what is the big deal about them being slotted (apart from price of course)?

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Old 03-25-2017, 03:21 PM   #2
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With modern tech honestly its more your butt dyno that is the opinion decision. The slots are designed to evacuate gassing from between the rotor and pad. It carries the same down side as drilled does and that is the ability to develop cracking in the rotor under extreme use. Unless you plan on racing or do extreme mountainous driving. Standard rotors are just fine for normal applications- even with over sized tires. Only thing I would change to with oversized is a bigger braking system to give more friction surface for more stopping potential. Other then that depending on the quality of the slots you may feel a little bit of vibration in the pedal when braking .

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Old 03-25-2017, 03:26 PM   #3
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The slots can also collect mud/debris when offroading.
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Old 03-25-2017, 04:25 PM   #4
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I find my slotted squeak more, likely do to debris.

You can also take this chance to do a little customizing. Here's mine when I installed them:






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Old 03-25-2017, 04:48 PM   #5
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Slotted rotors do fill with mud and dirt which wear pads out quickly. I had slotted and drilled rotors and have since gone back to plain rotors.
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Old 03-25-2017, 04:48 PM
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I wanted to get solids but as I said I very limited as to what I can actually purchase and have delivers to me. The EBC slotted are among the few that I can choose from. Is the whole "dust and debries" getting in is based on something or experience?
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Old 03-25-2017, 05:25 PM   #7
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Experience. Over the course of the 3 years I ran them I went through 5 sets of rear pads. I usually only go through a set of rear pads every 1 1/2 years.
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Old 03-25-2017, 06:01 PM   #8
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It only makes sense that when driven in a dusty area, you will get more stuff in the slots. It's not a big deal on the road, but off road dust gets everywhere. Add a little water and you have a mess. I would think cross drilled would just give more spots for little rocks and stuff to collect.
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Old 03-25-2017, 06:19 PM   #9
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If it is your only option it is a perfectly good option. Just be glad drilled are not your only option.
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Old 03-25-2017, 08:43 PM   #10
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Quote:
Originally Posted by mrsuthern View Post
With modern tech honestly its more your butt dyno that is the opinion decision. The slots are designed to evacuate gassing from between the rotor and pad. It carries the same down side as drilled does and that is the ability to develop cracking in the rotor under extreme use. Unless you plan on racing or do extreme mountainous driving. Standard rotors are just fine for normal applications- even with over sized tires. Only thing I would change to with oversized is a bigger braking system to give more friction surface for more stopping potential. Other then that depending on the quality of the slots you may feel a little bit of vibration in the pedal when braking .
Other than you statement that they develop cracks right on.

Any rotor can crack if you exceed the temperature the rotor is designed for, even solid. In fact the only rotor I ever saw crack, and it actually broke was a cheap solid rotor never designed for track use. I am sure the rotor the OP is looking at exceed the design of our stock rotors.
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Old 03-25-2017, 08:48 PM   #11
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Slotted rotors do fill with mud and dirt which wear pads out quickly. I had slotted and drilled rotors and have since gone back to plain rotors.
Mud or no mud you will go through pads faster with slotted rotor. The up side of that is it is the pads that wears out not the rotors as there is an escape path for the much and dirt.

FYI: If I was playing in the mud full time I would not use slotted rotors. In fact I would use the cheapest rotor and pads I could find because both are going to wear faster than playing in say the desert SW.
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Old 03-26-2017, 09:41 AM   #12
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They look cool, but can be noisier. I put slotted rotors on a past sports car and with the top town, cruising, I could hear a "whizzing" sound that was coming from the rotors.
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Old 03-26-2017, 11:45 AM   #13
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If you ever get into mud, you don't want slotted rotors. Trying to get the mud out of them is a pain in the neck.

I went with the Dynatrac ProGrips. They're a little on the expensive side, but they perform very well even with my 37" tire and wheel combo that weigh 143 pounds each.
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Old 03-26-2017, 12:10 PM   #14
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Other than you statement that they develop cracks right on.

Any rotor can crack if you exceed the temperature the rotor is designed for, even solid. In fact the only rotor I ever saw crack, and it actually broke was a cheap solid rotor never designed for track use. I am sure the rotor the OP is looking at exceed the design of our stock rotors.
For the most part I agree. I have seen a couple crack though- mostly due to piss poor manufacturing. Between using inferior metals, slots/ holes placed too closely together and especially the slotted kind the slots machined too deeply. My favorite one though was the Vented rotor that a customer thought would be a good idea to slot himself. By the time it got to us he was 1 or 2 heavy applications from losing the face of the rotor.

OP definitely needs to make sure it's a reputable brand that can be verified in some form.
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Old 03-27-2017, 03:21 AM
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EBC is a well known brand of brakes and rotors.
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Old 03-27-2017, 03:23 AM   #16
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EBC is a well known brand of brakes and rotors.
You should also look at DBA. That is what I used on all my Vettes.
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Old 03-29-2017, 10:43 AM   #17
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Centric premium can probably be found on Amazon and are a high quality option.
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Old 03-29-2017, 11:20 AM   #18
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I would start looking at other options of getting rotors imported into your country (possibly a bribe to an official). Where the hell do you live, North Korea or maybe Kalifornia, where they won't allow rotors?

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