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ive used cross drilled and slotted rotors on my car, and they never warped or cracked or anything. i think it probably has to do with heat and pressure load and so forth but i guess if porsche can have it on their cars and have no problems(i guess?) then it should be ok. ive actually never seen anyone else with a cracked or warpped disc..
From reading on the DBA site, they themselves admit that cross drilled rotors have a tendancy to crack. But they did also state that a upgrade in rotor size and calipers will help prevent cracking. I am guessing because it can spread the heat around in a larger area.
Porsche can probably come stock with drilled rotors because they have huge calipers and disks, therefore not as much brake pressure is needed to slow the car down, therefore less heat. Also they use ceramic disks, which I am guessing would help too.
But if you are just going to be driving around normally with a few hard braking corners every now and then, then I guess drilled would be fine. But if you are going to go for some hard drives in the mountains, then I suggest not.
Anyways, I dont really see the point in slotted rotors, besides a bit of bling factor. They are a tiny bit lighter, and might cool a tiny bit better, but whats the point when there is a chance they will crack and waste the $500 you have just spent on them. (And most people I have talked to have had problems and have said never again)
For people to go to track: get DBA ClubSpec 4000 (or 5000 if it's available for your car)
For people who do not track (which is most of you pansies): get the normal DBA discs, be it slotted, or slotted or cross drilled.
i believe there is a huge difference between expensive 'cast' discs(porsche, mercs etc) and cheaper 'drilled' discs...
i ahve used DBA 4000 Wiper slot discs without a hitch, but my DBA golds cracked due to tracking...
Can you please be more specific on which part of the brake is failing?Quote:
Originally Posted by Steer^Gimic
Yeah not sure on that one but I dont understand y Porche would put crap disks on a car thats practically track prepped especially on a 300 grand carQuote:
Originally Posted by Steer^Gimic
Also the ceramic discs are an option but even the other discs have cross drilled rotors
i think i have the erroneous comments regarding Porsche discs covered....Quote:
Originally Posted by tinkerbell
No I never said they where crap Ive always believed Porche has mad brakes
Additional note: Brembo brake discs are manufactured to be cross drilled to begin with, meaning that no holes were ever drilled onto the discs.Quote:
Originally Posted by tinkerbell
I just picked up my RDA slotted rotors today, hoping to source some EBC Greenstuffs this weekend and install it all.
I shall review when installed