Whose got Slotted/Cross Drilled Rotors?

[jlevie]

The OP did not say anything about track use; until I have seen a failure on the race car with slotted/drillrd rotors I will hold onto my opinion.

A friend of mine was badly injured in a wreck caused by failure of a cross drilled rotor under braking. There's one example for you.

[Aptyp]

it's funny how people who talk shit about getting drilled/slotted rotors for the bling factor...


same few shitheads that install euro plates under their state plates and german check panels.

[quickervicar]

My experience is based on my Passat, not my E30, so take it or leave it.

Cross-drilled lasted a good long while, were quiet, had good pad life, performed very well on mountain passes, but eventually cracked. Replaced with:

EBC Dimpled/Slotted which performed well (especially in rain), but ate pads quickly and were incredibly noisy. "Airplaning" was expected, but not to the extent that I experienced. I also tend to believe that all the surface area missing from the rotor really reduced my swept area. These were replaced with:

ECS Tuning "Rally" Slotted cut from Brembo blanks. The slots were divided into 3 staggered cuts instead of one big cut. The pads really bit well (again, really noticeable in the rain) and lasted long enough. No airplaning, either. I would buy these again, but I believe they discontinued them.

[Wh33lhop]

it's funny how people who talk shit about getting drilled/slotted rotors for the bling factor...


same few shitheads that install euro plates under their state plates and german check panels.

Eh. Slotted/drilled with stock sized rotors looks retarded anyway. I'll stick to blanks, until, pray tell, some day I land a BBK.

[bzboardz]

i need to do my brakes soon also this is good info. anyone have anything to say about ATE premium one rotors?

[nando]

it's funny how people who talk shit about getting drilled/slotted rotors for the bling factor...


same few shitheads that install euro plates under their state plates and german check panels.

I don't see a europlate anywhere on my car?

and yes, they do look stupid on tiny brakes. what's the point bling stock E30 brakes? going to buy some of those BREMBO caliper covers while you're at it?

[KenC]

Can you turn cross drilled ones if they become a tad warped?

[quickervicar]

Can you turn cross drilled ones if they become a tad warped?

Usually, yes. But it requires a special round-nosed cutter for the lathe so the holes don't grab the tooling.

FWIW, my Passat setup was Audi S4 calipers biting on Corrado G60 rotors

[speedminded]

The OP did not say anything about track use; until I have seen a failure on the race car with slotted/drillrd rotors I will hold onto my opinion.

Find me a real RACE CAR that has cross-drilled steel rotors.

Cross drilling was originally done to allow gases to escape from pads made of asbestos. The gas build-up prevented the piston from clamping the pads to the rotors. Those pads have not been used for decades. There are quotes from the president of Brembo admitting that cross-drilled rotors are strictly for looks and have zero performance benefits. Removing mass from the rotors by drilling holes actually increases the temperature of the rest of the rotor so technically they reduce the performance.

On the street severe temperature changes like water puddles or car washes after heavy brake use can cause them to crack. On the track they WILL shatter. (See next quote)

Slotted rotors are 100% functional on the track, they shave the pads like a cheese grater to prevent glazing of overworked pads. A competent race team knows what pads to use for a particular track and application and rarely have that problem so blanks are sufficient.

A friend of mine was badly injured in a wreck caused by failure of a cross drilled rotor under braking. There's one example for you.

Guessing by your race credentials, was he driving a Porsche 944 Turbo at Road Atlanta? If so this was him crashing behind my old roommate, if not then this is just another case of cross-drilled rotor failure on a car:

http://video.google.com/videoplay?docid=7422704062563904638#

Carefully read the description to know when and where to look.

[jlevie]

Guessing by your race credentials, was he driving a Porsche 944 Turbo at Road Atlanta? If so this was him crashing behind my old roommate, if not then this is just another case of cross-drilled rotor failure on a car:

http://video.google.com/videoplay?docid=7422704062563904638#

Carefully read the description to know when and where to look.

Yep that was the incident i was referring to. As I recall, Kenny said he felt/heard a bang when he went to the brakes for T7 and then the car just came around. Part of the brake rotor was found well away from the impact site.

[speedminded]

Yep that was the incident i was referring to. As I recall, Kenny said he felt/heard a bang when he went to the brakes for T7 and then the car just came around. Part of the brake rotor was found well away from the impact site.

Kenny was in a coma for several hours wasn't he? They red flagged the event and everybody walked the track, they found pieces of the shattered rotor on it...

[rwh11385]

Yep that was the incident i was referring to. As I recall, Kenny said he felt/heard a bang when he went to the brakes for T7 and then the car just came around. Part of the brake rotor was found well away from the impact site.

Damn.

[Philo]

But hey, don't listen to these guys. If you're not smart enough to take their advice. . . . .Well that would just be one less ignorant person I have to deal with in life.