slot direction

[phatdoughnut]

we just need to know if there was only 1 slotted rotor design made, because if its true then oneside points one way and the other points the other way, which inturn you are all wrong. kinda like deevers wheels.

or did they make a casting for one side and another for the other, in anycase i dont think it really matters cause slotted rotors arent worth the money imo

[uncle_el]

we just need to know if there was only 1 slotted rotor design made, because if its true then oneside points one way and the other points the other way

and if that's the case, then apparently the design isn't all too important, as it wouldn't make sense that one side gets better venting/dissipation of gases than the other.

kinda like deevers wheels.

[phatdoughnut]

thanks EL

[HondaFan81]

http://www.cb7tuner.com/vbb/showthre...&page=17&pp=15

on this link are pics of my EBC front slotted rotors and they were marked "L" and "R"

[SoySauceCb7]

hey i was just saying it is only brembo that has directions to install them that way. if you dont believe me call brembo themslevles and ask them to send out the direction sheet for the correct direction of there slotted rotors.

[phatdoughnut]

so did you guys ever figure it out?

[usc]

first i apologize if this has been covered already. i did search and found nothing.

what is the best direction to face when installing slotted rotors? some have them spinning with the grain and some have them spinning against the grain. i believe they both have their pros and cons but which one is best for let's say autocross? what setup are you running, for those with slotted rotors?

thanks in advance!

Tim, for 99% of the slotted rotors out there, it doesn't matter what direction the slots are facing. The only time it matters is when the rotors themselves are directionally vented. Meaning that the internal veins have a specific direction, instead of just being 90-degrees out from the hub. Even then, the rotor direction is dictated by the internal veins, and the manufacturer is still free to slot the rotors whichever way they want. Directionally vented rotors are designed like fans. I have a photo on my home computer somewhere...

In any case, directionally vented rotors only come on more expensive, large rotors. Even brembo's own 12.1" big brake kits' x-drilled rotors are not directionally vented. The 13" ones, however, are.

So in short, which directions the slots go in does not matter.

[1badwag]

on a diff. theory. forget venting-cleaning. think stoping

going with the grain (like in pict )the grooves are pushing caliper-pads away from center of rotor. working against each other

going against the grain. outter part touches first... would pull the caliper-pads inwards towards the center making the brakes grab harder under hard braking. working together

just a theory.. i think it would make a diff. any thoughts??

[usc]

on a diff. theory. forget venting-cleaning. think stoping

going with the grain (like in pict )the grooves are pushing caliper-pads away from center of rotor. working against each other

going against the grain. outter part touches first... would pull the caliper-pads inwards towards the center making the brakes grab harder under hard braking. working together

just a theory.. i think it would make a diff. any thoughts??

If you're suggesting horizontal pad movement is a good thing while breaking, then I'd have to disagree here. At any given reference point between the rotor and the pad, the forces applied are vertical (due to the caliper pistons clamping). The direction of the slot (in your theory) would simply shift the pad on a horizontal plane, either to the left or right; but regardless of the direction, the horizontal force at that reference point would be the same.

Not sure if this has been covered above but the supposed reasonings behind slotting/x-drilling is to vent the gases that are generated under extreme heat between the two materials. The holes/slots allow the release of pressure generated by the heat, therefore allowing the two surfaces to come in contact more often and consistently.

[timmy0tool]

nice to see you back and giving input well over some people's heads there julian (usc) . i understand what you said about the directional veins. i've seen that in a cross-section of a certain brembo rotor; it was prolly that 13" one that you mentioned.

back to the subject, i understand your reasoning regarding the direction of the slots. i just want to make sure that the direction i choose is the correct one. after telling me that it doesn't matter, i can rest a little easier. call me meticulous!

[SoySauceCb7]

WELD racing of japan, they built the all carbon fiber prelude ect, uses the brembo slot direction hooking forward as well. and once again its because of the venting veins that funnel air out of the rotor, not because the slot themselves.