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rotor direction

This is a discussion on rotor direction within the Suspension and Handling forums, part of the General Help category; why do i see so many cars with slotted and or drilled rotors on the wrong side of the car ...

  1. #1
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    rotor direction

    why do i see so many cars with slotted and or drilled rotors on the wrong side of the car running backwards from the way i think they should run. at the drags, car shows, everywhere. the curve of the hole or slot pattern should be running from the hub outward toward the rear, like a spin art type thing running the same direction of the wheel rotation, not the leading edge at the outboard edge of the rotor curving to the rear in towards the hub! or am i wrong?

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    formally 01 T/A 0verkill's Avatar
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    your rong on that one the way you see it is the way they are designed to work.

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    Quote Originally Posted by 01 T/A View Post
    your rong on that one the way you see it is the way they are designed to work.
    i see it both ways. you mean the way i think is wrong is the right way? im pretty sure mine were marked on the boxes R + L when i put them on thats why im questioning why so many are the other way, like mine were marked wrong maybe.

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    no, rotors that are directional have curved cooling fins on the inside of the rotor

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    formally 01 T/A 0verkill's Avatar
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    Quote Originally Posted by DIRTY JERZY View Post
    no, rotors that are directional have curved cooling fins on the inside of the rotor
    he is talking about the drilled and sloted ones
    and that how all the ones i have in stalled have bine but mabe some do it different

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    Im talking about cross drilled-slotted rotors as well the fins in the middle of the rotor tell you if they are directional.

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    Quote Originally Posted by DIRTY JERZY View Post
    Im talking about cross drilled-slotted rotors as well the fins in the middle of the rotor tell you if they are directional.
    i never looked at the cooling fins but i think i solved the problem. i checked with the police car mechanic at work today, and he has a stock of new in the box raybestos slotted and drilled rotors. both the part # ending in R or L and the rotor marked R or L match. the arc of the slots and holes as the wheel turns goes from the hub outward [the spin art design i was talking about] not leading edge at the outer edge of the rotor curving in towards the hub as the wheel turns. wish i could put up a picture but i think you get the idea. the theory is to fling the gasses and stuff outward not draw in toward the hub. i dont know if it matters for normal street driving, but it had me wondering after seeing cars with them going in different directions.

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    I've heard both arguments. Some agree with your "right" way so gasses & stuff escape better, and some go with your "wrong" way because if does a better job of cleaning the pads.

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    Quote Originally Posted by mbrownin View Post
    I've heard both arguments. Some agree with your "right" way so gasses & stuff escape better, and some go with your "wrong" way because if does a better job of cleaning the pads.
    thats the first i heard anything about cleaning the pads. i gather even tho the mfr says put them one way, it doesnt matter on the street which way you go.

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    formally 01 T/A 0verkill's Avatar
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    for a street car a soild roter is the best the drilled and sloted is more for the looks. with the lack of asbesto in brake pads now there is no real reason to have the slots or holes. now that is to all the teck stuff i have bine seeing latley so take it for what it is. i still want a set of sloted and drilled baer's for my bird.

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    I call bs syock rotors suck they warp and you end up needing new ones xdrilled sloted ftw

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    stock sorry about that

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    formally 01 T/A 0verkill's Avatar
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    and cross drilled will some times crack

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