xilef1025

very goods information

DCFIVER

The information has contradictions. None of the "brake and friction experts" addressed the information provided by 'builthatch' which he allegedly has gotten from an individual who was in the employ of Race Tech. That individual stated that cross drilled rotors served a purpose on OE applications and was superior in braking. I realize the thread is 5 years old and i have not seen many of the posters around any more, but perhaps some one else can refute the statements made.

stateofjustin

I'm still waiting to see the documents and statements from Porsche and Ferrari that say they are only using cross drilling as a cosmetic enhancement. Have yet to see it.

DCFIVER

Agreed.

S2Integra

There is a good reason why full racing companies use cross drilled or rotor comprised of specially designed carbon kevlar. Heat dissipation. Contrary to many posts and otherwise common misnomers about cross drilled rotors, they are used in racing becuase they are lighter and stay cooler for the duration of their intended use. Just watch the speed channel and observe a GT race with DP or LM racing. They reporters have explained the way brakes are used and changed during a race. Some brake system are setup so that they are quick change. This requires 2 bolts to remove the rotor caliper and pads in one unit. In other words, during a 12 or 24 hour race, multiple rotors pads and calipers are used and then pitched. Therefore the shots they had on these systems indicated that most teams use cross drilled. Not only is there less weight, but during operation, they work like slotted rotors, kikcking dust and gases from the metal to metal contact. while not in use air passes through the holes to cool the full rotor, much like the purpose of the wheel which has spokes. The opening create a small vaccum thereby pulling in passing air toward the entire braking system. Same with the rotors. Remember team have Lots of $$, so they can afford to throw stuff away to be slightly faster. Overal reliablity of the drilled rotors are a lot less because they can crack. But in full production racing, it doesn't matter. Itt'l be thrown away after a few laps anyway.

DCFIVER

Everything you described about using these rotors is are the reasons given as to why many OE's also use this type of rotor. But many that have posted in this thread and other threads claim it is just for cosmetics..However I have yet to see any literature from any OE manufacturer that supports this.

stateofjustin

Also waiting to see technical documentation that states quite clearly that NO modern brake pads are susceptible to off-gassing, and therefore a gas layer between the pad and rotor no longer exists.

I guess the slot cut vertically down the center of many performance brake pads must also be for cosmetic purposes. Like a racing stripe maybe? good for 2hp?

I don't believe I saw anyone suggest another method of eliminating a gas layer, though there is one which doesn't require any material to be removed from a rotor.

Really... this thread has more holes in it than any cross drilled rotor.

CivicSD

cross drilled looks cooler, blanks are boring