Drilled and slotted rotors

[5.0Vonn]

I just changed my rotors to Drilled and slotted rotors, I’m curious to see if there’s much of a difference in cooling/braking power. Any thoughts?

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[Lbj]

Looking good what brand are they

 

[Crew4991]

Drilled rotors will dissipate heat much better than non drilled rotors, but depending on how you use the car it might not make a difference at all.
If the car is a daily driver, you won't probably notice anything different besides the brakes sounding louder when stopping. If the car is tracked, then yes maybe you will notice better performance when they heat up.
Regardless drilled rotors certainly look nice and give the car a sportier appeal.

 

[Jstang23]

Depends on what you're using it for but generally there will be no difference or worse performance. If you are using it for the street then you won't notice a difference. If you use it for the track then you'll find you get worse performance. Yes they may cool better (depends on ducting and airflow to the rotors) but you're losing surface area. So your pad bite will have less surface area and lose some of its stopping power. In addition, you'll find that when they reach their maximum rated temperature they will develop cracks around the drilled holes, this will eventually ruin your rotors. My advice to anyone tracking their car is to stick to blank rotors or slotted rotors. The drilled rotors you see on racecars replace their rotors after every race and are generally not drilled but forged with the holes. Drilled are mainly for looks, and they do look very good!

 

[luc]

Drilled rotors will dissipate heat much better than non drilled rotors, but depending on how you use the car it might not make a difference at all.
If the car is a daily driver, you won't probably notice anything different besides the brakes sounding louder when stopping. If the car is tracked, then yes maybe you will notice better performance when they heat up.
Regardless drilled rotors certainly look nice and give the car a sportier appeal.

Totally wrong.
what dissipates heat is the thermal mass of the rotors and obviously the holes remove weight and therefore mass
It was a time when brake pads were out gazing and therefore holes gave a way for those gas to escape
Almost no one that track their cars use drilled rotors because they have a tendency to develop serious cracks going from holes to holes
Nowadays they are more of a fashion statement that anything else

 

[Crew4991]

Totally wrong.
what dissipates heat is the thermal mass of the rotors and obviously the holes remove weight and therefore mass
It was a time when brake pads were out gazing and therefore holes gave a way for those gas to escape
Almost no one that track their cars use drilled rotors because they have a tendency to develop serious cracks going from holes to holes
Nowadays they are more of a fashion statement that anything else

Totally wrong?

I think not.

https://www.brembo.com/en/company/news/brembo-perforated-disc-5-reasons-for-purchasing

 

[luc]

Totally wrong?

I think not.

https://www.brembo.com/en/company/news/brembo-perforated-disc-5-reasons-for-purchasing

You’re funny, it’s marketing. Go to a race track and see how many cars have drilled rotors

 

[Jstang23]

Totally wrong?

I think not.

https://www.brembo.com/en/company/news/brembo-perforated-disc-5-reasons-for-purchasing

You're going to believe an article designed to get you to buy rotors written by a company that sells brake rotors Please do show me the physics that explains how less surface area has more grip

 

[Crew4991]

You’re funny, it’s marketing. Go to a race track and see how many cars have drilled rotors

Most of my cars have drilled rotors.

 

[luc]

Most of my cars have drilled rotors.

…. And ?? Do you track your cars ?
My Porsche also has drilled rotors from the factory but i don’t track it , otherwise i would replace the rotors

 

[Jstang23]

Most of my cars have drilled rotors.

That's wonderful, I bet they look great. But that doesn't mean you're right. Seriously go to a track or an actual race. The cars that have drilled rotors will be less than 10% of the cars on track and if they do chances are they are ceramic rotors or OEM forged rotors with cooling cavities (drilled rotors but not drilled).

 

[RonsterGT]

I did the Powerstop kit, Z26 I think it is?
Anyway, every bit as good as stock, far less brake dust. 100% satisfied.
Spirited driving, no track work.

 

[luc]

I did the Powerstop kit, Z26 I think it is?
Anyway, every bit as good as stock, far less brake dust. 100% satisfied.
Spirited driving, no track work.

Drilled rotors are totally fine on the street and do look good
But they don’t bring any performance advantages and do not belong on a track

 

[Crew4991]

…. And ?? Do you track your cars ?
My Porsche also has drilled rotors from the factory but i don’t track it , otherwise i would replace the rotors

Yeah, I do.
Drilled rotors from factory on viper, ferrari and both porsches. Boxster Spyder is sitting outside.
What would the engineers at the OEMs know about drilled rotors? Hmm.
Only cars that don't have drilled rotors are my mustang and audi.
I prefer non drilled rotors by the way.

 

[luc]

Yeah, I do.
Drilled rotors from factory on viper, ferrari and both porsches. Boxster Spyder is sitting outside.
What would the engineers at the OEMs know about drilled rotors? Hmm.
Only cars that don't have drilled rotors are my mustang and audi.
I prefer non drilled rotors by the way.

Not on my Viper

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