Drilled & Slotted vs. Regular


Are they worth the cash? Has anyone tried these drilled and slotted from Price Choice auto? I have bought their stuff before and had good luck with it. http://www.primechoiceautoparts.ca/p...ake-rotor.aspx

 

If you race or if you think they look good then yeah. The slots help to expel the gasses released from the pads and the holes I believe help with water. I believe they make drilled rotors that are cast that way, rather then actually being drilled. I believe those are better as they won't stress crack, though I could be wrong.

 

For street driving it won't make a difference. If you track it, then slotted or J hooked is better. Drilled are just for bling.

 

drilled rotors are not good for the street. they crack and cause issues.

 

Interesting

I wouldn't think street use would be harder than track use but maybe so when you add the elements you won't see on a sunny track day

 

more heat cycles and longer use case damage. The drilled rotors have been weakened by the removal of material and that combined with extra wear and tear will lead to failure. The drilled rotors look cool but most race cars run slotted or dimpled if not anything.

 

Yes, go look at real race cars and see what they use. Most often they are blank, or sometimes slotted.

Even when they do use drilled rotors (which occur more in less high end race cars), the rotors are replaced every race. It's not a big deal if they crack after a race, they're going to be replaced anyways. Are you going to replace your rotors that often?

I'm fairly certain most car companies that put drilled rotors on production vehicles do it because it looks cool and sells cars.

 

Why does it look better?

I mean I agree it looks better but why are we wired to think it looks better?

 

it adds detail to a boring thing

 

so pretty

 

Ferraris, Lamborghinis, Porsches, Mercedes Benz, etc all used cross drilled rotors, even on their standard models. Seriously go look at a base MB C240 at the mall next time - it'll have cross drilled rotors on the front. Here's the kicker too...they use the same rotor left and right. So one rotor's veins are sweeping forward, and the other is sweeping backwards

 

Fail. Those are pretty. After burning up my brakes at the Ring I wouldn't use drilled rotors for sure. I would also upgrade the pads and fluid before upgrading the rotors. Those are the weak links.

I'm due for some Super Blue fluid when I get back. My pedal is really spongy because I boiled my fluid.

 

I have the power slot rotors on my 4.0L with HP Streethawk pads. The Stang stops a lot quicker with a shorter travel distance. They also look narly when or if you go to Show and Shines.

 

There is a caveat here too. The "cross-drilled" rotors used on supercars are actually not cross-driled, but molder as a single piece of metal in a cast with the cross-drill pattern. This way they retain the structural integrity. I'm not sure what the process is for Carbon Ceramic discs.

But I'm also a firm believer in solid rotors, or slotted at best for racing. I use solid rotors only for when I track my car. Less complexity and less cost to replace.

 

This.

Plus you have slightly less surface area when working with slotted/cross drilled which, unless you have gigantic rotors, doesn't bode well for stopping.

 

Makes sense. I'm a slotted fan myself, though I had solid on my 03 with Cobra R Brembos and well, I have solid now on my stock 2014 Brembos. I would like to go to slotted though, if only for the look.

 

also keep in mind most modern pads put out far less gas and dust then old school pads.

 

Have you seen the factory Brembo pads???

 

"factory" performance pads are not very good. ford actually did a mid year change in 2014 on the Focus ST because of the dust complaints. My wilwood pads make very little dust.

 

This

The brembo pads dust like crazy. My front wheels a perpetually darker than my rears. The race pads I use are even worse, but much better at the track.

Are your wilwoods ceramic?