I have a 87 GTA and a 89 IROC-Z and i have the opertunity to buy some raybestous brute stop slotted and cross drilled rotors for about 60 dollars a piece since I manage a parts store. Are these worth it or should I keep the stock ones?

 

They'll look good. There isn't much of a performance gain with them. Save you stock ones for when they do need to be replcaced.

 

Is it true that slotted (or cross drilled) rotors can't be turned? I heard that somewhere. JC Whitney sells some slotted front rotors for $60 or so, I was thinking of getting 'em if my rotors become that thin. I'm sure they're not Raybestos, though!

 

They cross drill them to expell heat to reduce brake fade, and slot them to help get rid of the gasses that form between the pads and disks from heat (kindof like hydroplaning and aquatread, sort of)

 

im not sure if cross-drilled rotors can be resurfaced, but i am one that can vouche that they do indeed add a noticeable performance in braking.

incase you're wondering i ordered a set from powerstop...

 

Didn't notice any improvment when running thought the canyon with them. They just look good.

 

from what i've heard there's no point in slotted rotors any more because modern pads don't produce the gases they used to.

 

Slotted and crossdrilled rotors are now mainly for appearance. Year ago when brake pads were made with certain gases, the slots would allow for the gases to escape and thus increasing the braking performance. Today's brake pads are better and most don't even cause those gases anymore. So if you're looking to stop quicker with slotted and crossdrilled rotors, save your money for the 1LE upgrade or Baer or something to make your car faster.

 

This subject has already pretty much been discussed.

Here is the link to an old post:
https://www.thirdgen.org/techbb2/sho...threadid=59646

 

What he said, but...

Slotted and cross drilled rotors free up a lot of excess rotating mass, as well as decrease the unsprung weight. The combination makes the acceleration, breaking and suspension response more crisp.

 

Thanks for that link, Andy! I think I've changed my mind, maybe when my rotors thin out, I'll stick to buying regular rotors instead of the JC Whitney slotted ones.

 

I have the PowerStop Cross drilled rotors.. i noticed a definite decrese in braking ditance. I love them. They do make a difference over the stock ones i had. Pads make a huge difference too.

 

I talked to Baer and they recommended against crossdrilled rotors for high heat racing applications because they are more prone to cracking.....

 

no point going into them, i have the gm versions an love them. here's a pic when i was working on everything.

anyone know if you can purchase a better caliper that will fit on the stock setup?