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Originally Posted by OldJedi
OK thanks Jordan. Is there anything to be gained with using Slotted/Grooved rotors over solid non grooved rotors?
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Not Jordan, but I'll answer.
No. Slotted/grooved/drilled rotors offer no performance benefit at all. At least, not until you gut your interior, put in a cage, buy $10k shocks, put on race slicks, and hire a pro-driver.
http://www.stoptech.com/technical-su...rade-selection
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DRILLED VS SLOTTED ROTORS
For many years most racing rotors were drilled. There were two reasons - the holes gave the "fireband" boundary layer of gasses and particulate matter someplace to go and the edges of the holes gave the pad a better "bite".
Unfortunately the drilled holes also reduced the thermal capacity of the discs and served as very effective "stress raisers" significantly decreasing disc life. Improvements in friction materials have pretty much made the drilled rotor a thing of the past in racing. Most racing rotors currently feature a series of tangential slots or channels that serve the same purpose without the attendant disadvantages.
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Drilled are a no-no pretty much everywhere these days. Too prone to cracking. Also, the reduce the surface area of the rotor, which means less overall braking performance.
As for slotting - IF you are OK with swapping brakes rotors more often, and IF you have already removed all non-race portions of your brake system (stock master cylinder, ABS module, rubber lines, etc.), and IF you believe you can tell a meaningful difference between a 3 millisecond initial bite and a 5 millisecond initial bite, and IF you make consistent enough laps to where these milliseconds will eventually add up to seconds . . . then it MAY make sense to go with premium slotted rotors (like the ones that cost $500 per rotor).
If not, then stick with regular iron rotors.