In the latest issue of Road&Track magazine, the M3, ZR1, Ferrari F430, Jag XKR, and 911GT3 were all compared to their racing counterparts.

In almost every case, the street version has drilled rotors while the racing version has slotted rotors. It seems obvious that the manufacturers include drilled rotors only because buyers "think" they are effective, sporty-looking or ?

I don't blame anyone who feels this way when it comes to choosing rotors for their C5, but like having a fake CAI scoop in the hood or a similarly fake brake duct scoops, I tend to stay away from such non-functional features. In fact, drilled holes in rotors can actually reduce braking performance due to their reduction of surface area (rotor diameter and other features being the same).

Some manufactures do currently (or very recently) ship street cars with slotted rotors; the Cadillac CTS-V and Dodge Viper ACR come to mind, so I believe the trend has started.

Thoughts?

 

Drilled and/or slotted are fine for the street. You cannot run drilled rotors at the track...they will all crack when they get too hot. I prefer the slotted look also.

 

I agree, just as 20-inch wheels may be perceived by some as looking good. However, even though they can be run on the street, they actually hinder performance - much like drilled rotors.

 

IMHO

Drilled---only pretty

Slotted---worth the money and still pretty, I've never had any warp when towing with my truck

The C6 Z06 brakes are cool, thoughI wouldn't want them as they are drilled.

Most high performance kits are only slotted for the track, for a reason: strength and off gassing.

My new ones will be slotted from Corvette Central

IMO Also dubs are dumb!! and stick on Hood scoops (& brake vents) are for high school kids with grocery getters, ricers and trucks.

 

stickily marketing customers want them

braking has quite a bit to do with surface area against the brake pad. How much area dose a hole have or reduce the surface are of the rotor disk ?

manufactures are finally listing to real reasons.

 

works both ways. Seen cryo rotors crack faster the stock too.

Brake rotors are expendable items, no matter how makes them or how they are made.

 

rotors are too thick to be cryoed properly. cryo only works well on thin items, under 2mm thick.

cryoing gray iron will cause more problems then the helping. just use the stock rotor and bed it in properly.

 

My PowerSlot rotors are cryo-treated because I don't enjoy swapping rotors. In fact, I fully expect to have the same rotors 10 years from now.

 

A few years back when I bought my Baer Eradispeed plus rotors, I ordered them in slotted only. No extra charge.

 

i have read that the primary function of the drilled holes is to allow built up gasses to escape, and the primary function of slots while still offering gas dispersant qualities, is to cut the glaze off of the pad that would build under severe duty. particularly road racing.
true or not?

 

[QUOTE=dklowrider;1575514968]i have read that the primary function of the drilled holes is to allow built up gasses to escape, and the primary function of slots while still offering gas dispersant

In the stone age, brake pads need an outlet for outgassing. With today's technology that isn't needed any more and thus no need to accommodate outgassing

 

This is the reason slotted provide better braking, longer lasting rotors..

 

Sorry, know quite a big about the cryo process, spent over 10 years studying the cryogenics of different materials.

But each to there own

 

[QUOTE=Joy of 6;1575515884]I should hope that if all the major racing teams are using slotted rotors, there's a good reason for it, don't you?

I still feel that having "fresh" pad material available when a panic stop happens can be only a good thing. Of course, if you pile on 15,000 miles a year of driving (half or more of it involving heavy braking), then you may not need slotted rotors. I drive my C5 5000 miles per year and my pads last many years at peak efficiency.

 

I have Baer Aero rotors that are drilled and slotted with the aluminum caps. They worked very well at HPDE with no cracking.

 

a lot of people that track often use plain napa premium rotors. from what ive read, its mostly the brake pad that counts. there is such little gain from slotted or drilled rotors, that its not worth the extra price if you are swapping them out almost every week.

i do have powerslot cryo rotors though

 

Here's a C6R rotor. Porsche, Ferrari, and BMW use slotted as well.

 

I used to drill the brakes on my GP bikes with a huge number of holes as a weight reduction method. I never noticed any degredation of the braking. The had so many holes in them they would sing when the brakes were applied. The trick is not having consecutive holes in a sweep path.

 

The bike also weighs A LOT less than a freaking car. The rotors are usually the same size as car rotors though and you get two huge ones on the front.

Point being...bike brakes probably don't generate as much sustained heat when compared to an auto.

SLOTTED FOR PERFORMANCE

DRILLED FOR LOOKS. PERIOD

 

All business