We had a meet this weekend and alot of 8's had crossed drilled/slotted rotors, BUT on some cars they faced "rolling" towards the front and on others they were faced "rolling" towards the rear. So which way are they suppose to face???

 

in this photo, the right side would be the front of the car:

http://img.ircimages.com/ircimages/7...838f5feec0.jpg

also, my rotors had directional arrows that made sure there was no misunderstandings on install direction.

edit: this photo is a pic of my rotors, and on the black hat, you'll see it clearly showing the proper direction.

 

the outside leading edge should point to the front of the car when at the top dead center as shown in the pic link above or in this link:

http://www.racingbrake.com/main/tech...0of%20Rotation

if they're going the other way somebody installed them backwards, which is quite common

 

Which way the slots face doesn't really matter, what matters is which way the internal vanes are facing. Otherwise, slots can face either way, and work about the same both ways.

 

it depends on the design of the rotor.. i saw the same as teams a while back... but i have the project mu rotors and they work the other way...

http://www.mackinindustries.com/md/p...akerotors.html

beers

 

it's explained in detail why it should be the other way on the RB site, putting them in the opposite direction doesn't evacuate the dust properly. However, if the rotor has curved vanes the manufacturer has to machine the slots in the proper direction. If they don't then you have no other option but to install them as they intended even if it's wrong:

http://forums.racingbrake.com/showthread.php?t=74

 

I think I got mine on right, thats the front right wheel

 

I've been told that its a JDM tuner thing????

 

you've been told wrong

 

OK the project mu rotors are the proper ones. The reason is because the whent he slots carve the pad the dust has to be pushed and flushed out towards the outside of the disk, not to the inside of the rotor. It only makes sense. When the rotor turns the force of the spin naturally pushes the dust from the pads out the rotor.

 

some people say that the slots should be facing toward the front of the car so the slots cut into the air... i think thats a big load of horsesh*t. i think they are supposed to be the other way. Thats how ive always seen it.

 

I think people are confusing two different things. If you'd have read the link from TeamRX8, you'd see this picture, that shows the outside and inside parts:



So the reason for the required direction should be clear.

Furthermore the outside of the disk also indicates the direction:

 

I guess I have mine on the right way then

 

I think you'll find the following link useful: Which way? How to properly install plain, slotted, and drilled rotors

 

wow,

and my favorite brake link is this....

http://www.zeckhausen.com/bedding_in_brakes.htm

thanks for the support.

beers

 

That link is very useful swoope! Thanks for that!

 

I got my slotted rotors from tirerack, i did the front first without noticing that they were stamped R and L until i went to install the rear. Sure enough, the fronts were reversed, so off they came. Getting the rear ms breakpads on with the new rotors was a real bitch, until i read the posts on how to turn the piston, dahhh. My only concern is that the boot gets all twisted in the process of getting the piston in far enough to clear the rotor. Is that an issue or does it bulge out back to normal with hydraulic pressure?

 

hold the boot so it doesn't spin together with the piston or twist it back after each rotation.

 

Are my dimpled/slotted rotors installed correctly, or are they wrong?
Both pictures are drivers side, any help will be greatly appreciated!

 

The RX-8 rotors have straight internal cooling vanes. So it makes absolutely no difference which way you install them. Whatever way is the most aesthetically pleasing to you is correct.

Hole pattern and slot direction do not impact bite and friction level and they do not impact dust evacuation either.

If you ever find yourself installing rotors with curved internal cooling vanes, you may find this link helpful: Which Way? How to properly install plain, slotted, or drilled brake rotors.

A bit of brake trivia ... the Corvette C6 Z51 and Z06 models do have curved internal cooling vanes. However, to save money, the GM beancounters decided to only produce LEFT rotors. Thus the driver's side rotors are properly oriented, but the passenger side rotors are backwards and run hotter!