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Old 06-17-2009, 01:57 AM   #1
El Gato Liso
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Slotted rotors question....

I had to give it second thought....but was way too unsure as i've seen both before.

and should i have the rear rotors go in the same direction as the front rotors?

A or B *front LEFT strut!!!*

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Old 06-17-2009, 08:18 AM   #2
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it really depends on the manufacturer, I had slotted rotors on my 540 and when I was installing them there was a L & a R stamped on the rotor, after installing it looked like the pic "B", do you know the brand of rotor you bought?

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Old 06-17-2009, 09:08 AM   #3
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I would have thought A, assuming you're trying to get the brake dust/gases to go outwards towards the wheel and not inwards towards the hub.

Edit: And whichever way they go, the rears should be the same as the fronts.
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Old 06-17-2009, 09:51 AM   #4
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look at pic b,as the wheel rotates the slots clean the surface of brake pads yes.
what would pic A do for yah?nothing slots would be on the wrong angle for rotation unless you drive backwards down the road
crossdrilled for the street good, slotted and crossdrill race application,you go thru a ton of pads. .Mister
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Old 06-17-2009, 10:29 AM   #5
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It won't matter, as long as the rotor vents the proper way. At the rear it won't matter since the disc is solid anyways.

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Old 06-17-2009, 11:43 AM   #6
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It's A. As someone one said the setup in A would allow the brake dust, gases to move outwards.

Just my 0.02, slotted/cross drilled rotors really only add aesthetic value. These 2 have been grandfathered in from the olden days when mechanical engineering had to substitute for materials engineering. You want to maximize the area of contact between the brake pads and rotor and slotting and drilling reduces that. And what's worse is you actually increase brake dust by using slotted/cross drilled rotors, thus reducing the lifespan of the pads. I haven't experienced cross drilled rotors but I have heard that they start cracking faster than plain rotors as well.

If you want higher performance rotors go with vented rotors. They dissipate gases and heat a lot faster without hampering the life of the pads.
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Old 06-17-2009, 12:11 PM   #7
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the people that are guessing it's "A" you don't really know do you, I already said it's really depends on manufacturers, some have it likepic "A" & some like pic "B", I've installed many slotted rotors & they vary from manufacturer, look at DTM race cars, they have their rotors like pic "B".

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Old 06-17-2009, 03:36 PM   #8
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I don't think they really make any appreciable difference on the street. Just like video cables - pay the $$$ for a 24 ct plated end or less for nickel plated. You'll still see the picture and probably won't know the difference unless someone told you. Plus, you'll needa scope to see any miniscule differences.

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Old 06-22-2009, 03:42 PM   #9
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install them like B photo and forget them
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Old 06-22-2009, 04:21 PM   #10
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Mine are installed like A.

The theory is that B gives it a bigger "Bite".
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Old 06-22-2009, 07:58 PM   #11
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Lol nice art
it wont matter
but if you want set them up like "a"
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