Quote:
Originally Posted by stiles_s
Genuinely curious about 2 things, and thanks for sharing your experience:
1) Did you try the new pads with new non-slotted rotors? Or, did you change both?
2) I'd appreciate pointers to the literature you're referring to. I still don't understand how slotted rotors could be superior to standard at dissipating heat as they have slightly less mass.
3) I do buy that slotted might help reduce buildup for the reasons "engineering explained" noted regarding slots "scrubbing" the pads resulting in a) faster pad wear but perhaps b) the scrubbing helps with overheated pad-transfer to the rotor.
Regardless, truly appreciate your BTDT experience.
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You’ll get a mixed bag in the literature:
Brake Discs — Smooth vs Drilled vs Slotted – Newparts.com
“Slotted discs are also better at heat dissipation than plain or smooth ones, and are generally on par with drilled rotors.”
“The biggest advantage of slotted rotors over drilled rotors is the fact that the former are structurally more sound. This is also why slotted brake discs are used on professional race cars.”
Drilled vs Slotted Rotors, Which is Better for You? - PowerStop Brakes
“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. This gas and dust reduces the friction force by preventing the pad from fully contacting the rotor.”
“Given the choice between drill holes and slots, the drill holes will give you better braking power over slots for normal city/highway driving. This is why high end BMW, Porsche, Corvette, and Mercedes rotors are drilled, not slotted. However, for track racing (high speed stops), slotted rotors are the better choice.”
Just a moment...
“Slotted rotor grooves offer two distinct benefits under heavy braking: brake fade, from high-temperature brake pad outgassing, can be significantly reduced, allowing gases to escape through the slots; and the grooves shave off thin layers of brake pad material, reducing glazing and improving braking consistency.”