I was looking for anyone who has bought any aftermarket rotors? I am in the market for some drilled or drilled and slotted rotors for brembo calipers. Please post where did you get them from, pads you are using, and experiences with them. TIA.

 

I have the exact same questions myself. There was an ad in one of the threads a few days ago that InvisionG35 posted for either drilled or slotted Brembo rotors. I asked him about drilled and slotted rotors, and he said that his company doesn't carry them because they can be dangerous due to reduced surface area (rotors crack, stopping distances potentially increase, etc.).

I've always wondered which is better, drilled or slotted? They seem to cost almost the exact same, so you have to figure that the performance difference must be negligible.

 

Both drilled and slotted wear the pads faster [with slotted being the worst]
Both versions make unique additional noise. Years ago they were developed to jelp with out gassing from pads as they bedded in, modern pads don't out gas very much.

Rotor performance is a function of weight vs temperature rise.......hard to tell metallugical quality without lab tests..........usually the heavier [more dense cast iron] the better in same style 1 piece units.

 

slotted/drilled rotors have a higher chance of cracking. but as long as you use them for daily driving you shouldnt have a problem..

 

Sounds like the stock Brembo "blank" rotors are pretty much ideal - is there anything on this car that's not already optimized so that mods don't help?

 

slotted/drilled rotors look cool

as long as you dont do any hard braking daily then drilled/slotted rotors should b e okay for you

 

damn calvin... it sounds like you are trying to scare people away from slotted/drilled rotors. I havent looked in to this, but I dont remember hearing anything about slotted rotors cracking. I have heard of cheap drilled rotors cracking under the stress of tracking the car. But then again, I would imagine cheap rotors would crack in those situations regardless of the style rotor. These issues have been discussed before...

*I see Stoptech viewing this thread, so hopefully he can chime in on this...

 

not trying to scare people. just warning them. it makes sense, doesnt it? that slotted/drilled are less resistant to cracking?

i myself am thinking about drilled rotors but dont wanna spend the money on them

if your rotors are still good then just change the lines and pads. i plan on stoptech stainless steel brake lines with endless pads

 

Just get the Stoptech stage 2 kit (make sure it is for Brembo equiped version) and call it a day.

 

eh i wouldnt get hawk hps pads..

 

I have the Stoptech 2 piece drilled rotors, bought them slightly used from protocav. Lighter than the oem Brembo rotors, stops great. A bit noisy.

Hawk HPS pads, which are great for dust. But they do not stop as good as the oem brembo pads.

 

Really difficult to determine rotor quality by the look of them. The key is in the quality of the metallugy used [who/where, what day the cast iron was poured]..........by some slightly food deprived Chinese labor or some better fed Polish worker [Brembo].

http://www.sae.org/events/bce/tutori...ron%20rotor%22

The above is a good read since you will probably have and buy and replace rotors as long as you own a car.

If you examine all the steps in rotor manufacture you will see how it is possible to sell $20 and $100 rotors that LOOK IDENTICAL.

Just as with $70 tires and $200 tires...........a 5-10% improvement doubles or triples the price.

 

C'mon now Q45. You've outdone yourself this time. 97 pages of highly technical information only an engineer could posssibly understand.
I was looking for but couldn't find the executive summary page.

 

May be a 'good read' but does not give us a clue as to who manufacturers what....gray cast iron I suppose would be the preference, if you know that's what you are buying.

 

Got pics?