Which way slotted rotors

This is exactly correct. Larger rotors are used on race cars for several reasons. The most obvious is that a larger rotor face means larger pads. Another reason is that larger rotors mean frictional forces are being applied farther from the hub, which means a greater lever arm and more torque available for braking. But a less obvious reason is heat dissipation. Larger rotors have more surface area and thus radiate more heat than smaller rotors. This equates to longer pad life and less chance of boiling brake fluid.

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I googled and found tons of pics of both installations. I found this image that someone claims is to be installation instructions for some race brakes. I guess when I had them a few years ago I installed them backwards. Thats how mine are installed. Slotted rotors do not improve any heat transfer. However, the slots can improve brake output by removing gas and dust that is trapped between the pad and rotor.

Slotted rotors do the same scrubbing of gases and heat without the disadvantages. For daily drivers, a solid rotor is A-OK but do keep in mind that cheap rotors will warp quickly.

Also, do drilled and slotted rotors eat pads? Yes, slotted and or drilled rotors will eat pads faster than a standard rotor but they do dissipate heat a lot faster for better braking. They perform well, although not necessarily better than other styles of brake rotors. Ceramic pads work fine on cross drill slotted rotors. Metallic pads will work just as well, up to a point. Street racers and high end sports cars are common users of ceramic brake pads. Slotted and drilled rotors cool down quickly and can provide better performance under extreme driving conditions.

The rotors on a vehicle can last anywhere from 30, to 70, miles and sometimes more. A licensed mechanic, such as one from YourMechanic, can evaluate the rotors and advise you on their status; they may not need to be changed as often as the brake pads. Ceramic brake pads typically last longer than semi-metallic brake pads, and through their lifespan, provide better noise control and less wear-and-tear to rotors, without sacrificing braking performance.

If you have a tight budget, this might prove to be a good option. Needless to say, I vouch for their Premium plain rotors as their highest grade series. Brand-name aftermarket pads are just as good — and sometimes better — than OEM. By joining our free community you will have access to post topics, communicate privately with other members, respond to polls, upload content and access many other special features without post based advertising banners.

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