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  #1  
Old 05-26-2006, 03:51 PM
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Default Brake Disc?

Is it a bad idea to put slotted or crossed-drilled rotors on the front and stock discs on the back? I did it with my Golf and everything was fine. I was just wondering if it would throw off the braking balance or something. I was going to do some autoxing and wanted a little more stoping power.
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Old 05-26-2006, 04:38 PM
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I highly doubt you're working your brakes hard enough in an autocross to overwhelm the heat capacity of the stock rotors. If you want more stopping power, consider a more aggressive pad, rotor plus-size kit (Ireland Engineering has one), or a big brake kit.

That said, it shouldn't do much of anything to the brake balance, but it also won't improve your braking much, since you're probably not experiencing brake fade due to overheating. If you're gonna go for drilled or slotted, go slotted. Drilled rotors have a tendency to crack.
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Old 05-26-2006, 06:01 PM
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Ditto on what Ivan said. hehe
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Old 05-26-2006, 06:21 PM
skitelluride531 skitelluride531 is offline
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Sorry to steal the thread, but I just have a quick question...


Are drilled rotors safe for daily driving? I do not do any autocross or track use with my MCS, and I like the look of the drilled versus slotted better .
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Old 05-26-2006, 06:32 PM
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Well, maybe I'll save myself some money then and just put some green stuff pads on stock rotors.
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Old 05-26-2006, 06:43 PM
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Drilled are for show really. Most race cars out there use slotted.

On my Mini I just plan on upgrading the pads, lines and fluid. Eventually slotted rotors.
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Old 05-26-2006, 07:12 PM
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Quote:
Originally Posted by skitelluride531
Sorry to steal the thread, but I just have a quick question...


Are drilled rotors safe for daily driving? I do not do any autocross or track use with my MCS, and I like the look of the drilled versus slotted better .
Yeah, they're safe. The only time you have a problem is when you push them hard, as in downhill canyon runs or track use. The problem is that they actually cool down too quickly, so with so many extreme heating and cooling cycles, they develop fatigue cracks around the drills, which can eventually lead to complete failure of the rotor. If you're just driving on them normally, it won't present a problem, but push them hard and you run the risk of developing cracks.

They are very efficient in cooling, but there are other ways to accomplish this (directional internal vanes, slotting). The reason you sometimes see them on race cars pretty often is that race teams replace rotors after every race. I don't know about you, but I certainly don't have the money to replace my rotors after every track day!
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Old 05-26-2006, 07:17 PM
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Quote:
Originally Posted by TheMayor
Well, maybe I'll save myself some money then and just put some green stuff pads on stock rotors.
Green Stuff = sucks! For performance, at least...

If you want daily driveable pads that are more aggressive than stock, go for a set of Ferodo DS2500. Bear in mind though, the more aggressive pad you install, the more squeal and squeak you're going to experience. You'll have to decide for yourself if improved braking performance is worth putting up with a bit more noise.

RSpeed.net used to have them pretty cheap, but they seem to have discontinued them. I would try http://www.raceshopper.com. They were the cheapest before RSpeed came along.
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Old 05-26-2006, 07:42 PM
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Thanks, I'll check them out.
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Old 05-26-2006, 07:44 PM
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No problemo.
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Old 01-26-2007, 04:17 AM
GTIandMCS GTIandMCS is offline
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Anyone heard about Black Dimond disk?
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Old 01-26-2007, 05:37 AM
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Doesn't Porsche use rotors that are slotted and "drilled" on their Ceramic kit? I say "drilled" because I think they aren't drilled all the way through, hence maintaining the structural integrity of the rotor. They are more like dimpled. I think I remember something like that.
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