drilled vs slotted rotors.. or neither
- Thread starter Insidious Surmiser
- Start date
Old article, but gets to the point...
Ceramic composite brake rotors are standard on Formula One racers, and a new era of road-car use is beginning with their optional - and super high-cost - fitment on bad-boy models like the Porsche 911 Turbo and Mercedes-Benz CLK 55 F1.
In addition to outrageous stopping power, the carbon ceramic brakes are claimed to reduce weight by almost 13 lbs. (5.8 kg) per rotor, and they're nearly impervious to heat-induced fade and will last for the life of the vehicle.
Famed Italian brakemaker Brembo doesn't plan to fall behind the trend, announcing that it has initiated pilot production of its own carbon composite material (CCM) ceramic brake rotors at its new Brembo GmbH plant in Ottobrun, Germany. Brembo is not, however, the supplier for either the Mercedes or Porsche ceramic-brake systems.
The company says it has a new process that reduces the ceramic rotors' manufacturing time to a few days instead of several weeks. The new pilot site, in operation since late 2000, is producing the rotors at the rate of 30,000 to 35,000 units annually.
A Brembo spokesman says the company is focused on reducing cost (Porsche asks an astonishing $7,990 for the option), and says the first Brembo-made ceramic brakes will be fitted to a production vehicle March 2001.
Attached pic is frictiontesting of an F1 rotor
Ceramic composite brake rotors are standard on Formula One racers, and a new era of road-car use is beginning with their optional - and super high-cost - fitment on bad-boy models like the Porsche 911 Turbo and Mercedes-Benz CLK 55 F1.
In addition to outrageous stopping power, the carbon ceramic brakes are claimed to reduce weight by almost 13 lbs. (5.8 kg) per rotor, and they're nearly impervious to heat-induced fade and will last for the life of the vehicle.
Famed Italian brakemaker Brembo doesn't plan to fall behind the trend, announcing that it has initiated pilot production of its own carbon composite material (CCM) ceramic brake rotors at its new Brembo GmbH plant in Ottobrun, Germany. Brembo is not, however, the supplier for either the Mercedes or Porsche ceramic-brake systems.
The company says it has a new process that reduces the ceramic rotors' manufacturing time to a few days instead of several weeks. The new pilot site, in operation since late 2000, is producing the rotors at the rate of 30,000 to 35,000 units annually.
A Brembo spokesman says the company is focused on reducing cost (Porsche asks an astonishing $7,990 for the option), and says the first Brembo-made ceramic brakes will be fitted to a production vehicle March 2001.
Attached pic is frictiontesting of an F1 rotor
Attachments
figgie said:[cracks knuckles]
nope
that is not the reason they use them
They use cross drilling to save WEIGHT not to improve braking. Back in the 60's/70's the pads gassed out like hell. Now a days that is not an issue even in a race circuit. Also remember that RACE teams chuck the rotors after each and every race. Slotting was used to help with the gassing out the pads. Again now a days it is not needed. And anyway if you compare the crossdrilling density of a true race setup vs the looky loo crap that the street setups get it is not even close.
Proven to work in reducing weight and that is about it. Trade off. Lose weight lose longevity.
so the real answer is, unless you are willing to replace the rotors OFTEN then neither option is a good option. Brakes are an energy tank. It stores heat and disipates it. If it can not store heat that when you start getting warped rotors. Crossdrilling/slotting takes away MASS which in the brake system made of steel or iron you need to store heat!
ahh more interwebbar myths!
FYI Racing porche and Ferraris do not run now where near the same components as the racing cousins. Ceramic based brakes disk vs CF/CF or densely crossdrilled STEEL rotors (notice I did not say Iron like the street brethrens, rotational mass removal is king in racing).
lol se my above statements
thanks figgie, this is exactly the kind of info i was looking for
my personal expierience with drill/slotted rotors is I've had an ebay set on my car for 3 years now with metal masters brake pads that I got off ebay and with a titan brake line kit and I've never had a problem with these brakes. autocrossing canyon crawling 140+ mph to 0 braking drag racing and so on. oh and did I forget to mention 2 years of pizza delivery on them as well? anyways I've never expierienced brake fade cracking of rotors vibration warping of rotors or anything with them. and as for slotted reducing the brake pad life by quite a bit I call bull honkey on that. I'm still on the pads I installed on my car when I put the rotors on my car 3 years ago and have half the life still left on the pads. yes I believe they reduce the life of pads a tad but not significantly enough to worry about it. anyways. I hope other will post PERSONAL expieriene with pads and rotors not more of "well my friend had this friend that had this problem" kind of crap that we see alot of. I'll take the word of someone who personally uses a product of 50 people saying they heard it was bad without any expierience with the product.
I would be even more impressed with that picture if it was for a supra. notice the lack of 1 hole for a stud.
He is used to it. His polyurathane motor mounts snapped part of his chassis and his 4age dropped like 7 inches. lol. Were fixing it now
damn, cracked exactly in the middle of the drill holes on both sides... doesn't get more definitive then that does he beat the shit out of his car or something?
like i said i've had mine for 10 months or so no problems... but i don't drive like a maniac if i did i'd get a big brake kit... actually i will be getting one anyways sooner or later, it's on the list
does he beat the shit out of his car or something?like i said i've had mine for 10 months or so no problems... but i don't drive like a maniac
if i did i'd get a big brake kit... actually i will be getting one anyways sooner or later, it's on the list
I bet that was caused by loose lug nuts or improper wheel fitment, not from the outside of the rotor.
Powerslot rotor was the worst one I have used. I don't autocross, or play other street games. They warped in very short time.
Stock rotor holds up much better.
Get a good kit, or don't waste your money.
Stock rotor holds up much better.
Get a good kit, or don't waste your money.
If you weren't going to be driving your car hard very often you would probably be ok with getting drilled/slotted, or one or the other. It's all just personal preference and what your intentions are going to be when buying a new set of brakes.
I run powerslots and porterfields on the supra.
I installed them late 2004. 20K no problems, lots of life left.
Ran the same setup on my 88T, and that car saw dozens of autocross days during its 15K stint.
I installed them late 2004. 20K no problems, lots of life left.
Ran the same setup on my 88T, and that car saw dozens of autocross days during its 15K stint.
Clip said:
no clue
i don't run slotted/cross drilled rotors.
If i were racing I would just to take some rotational mass off but that would be the extent of it. Of course if there was a CF/CF braking option for our cars I would forgo the cross-drilled nonsense in favor of the CF/CF brakes
keep in mind warping is exteme heat induced. Have to reach tempratures that you will NEVER EVER see on the streets. What you might have is glazed up material deposits on the rotor that will make the brake pedal pulsate.