Cross Drilled rotor ?

[Cole Angrimson]

ok a buddy of mine had a Camaro and he did his own cross drilled rotors by taking his and sand blasting them smooth all over. he then made out a pattern to follow on the front and back rotors. he then marked them and put them on a drill press and sunk a 1/8" drill bit all the way through the rotor. he then took a 1/4 " bit and drilled to a set depth just to give the rotor and aftermarket look. he drilled the second hole only about 1/16" deep right over the original hole to make the hole look like it's sunk in. it almost looks like aftermarket rotors. has ANYBODY else done this. i wish he hadn't sold the car so i could get pics [img]graemlins/burnout.gif[/img]

[Ian]

cross-drilled rotors have a tendancy to crack anyway. i wouldnt do that at all.


only cross drilled ones id get are real high quality ones that are drilled with the holes in a swept pattern. just drilling holes like the KVR rotors doesnt work well. If you look at any high performance rotor, the holes are drilled in the direction the rotor turns. This reduces the chance of cracks a lot, as well as chamfering the holes.

[SilverTAWS6]

Drilling your own rotors is a BAD idea. Hello stress cracks. The only rotors I'd get which are drilled are the ones that are cast in (such as the Baer Eraspeeds). They're really the only ones that won't crack under harder driving.

A good alternative is the EBC or Powerstop rotors. They have "dimples" in them that act to help cool them down but don't have the same problems with the cracking. Plus usually they're less expensive.

Chris

[Ian]

i just ordered some slotted bad boys from fasttoys.com. they are KVR.

[memphis_raines]

I agree with Ian. I went with slotted rotors because I had heard too many people talking about drilled rotors cracking. Besides, even slotted rotors lower brake temperature and improve performance significantly.

[slow]

the only good hole rotors are cross cast, meaning the holes are in the casting when the rotors are made.

This is the way the euro spec M3 brake rotors are.

I do not know of any for the 4th gen f-body's that are cross cast :(

Ryan

[RallyRed 98]

on top of the tendency towards stress cracks, you're also taking away surface area, meaning that you'd have to get softer pads in order to come up with a similar amount of kinetic friction despite the "escaping gases."

i've never believed that drilled or slotted rotors will help a street car unless you're taking a 6000 lb trailer down a mountain, and even then you'll glaze your pads before it even matters how much gas is escaping.

EDIT: even so, they look so sick that they're hard to pass up...

[ December 15, 2003: Message edited by: RallyRed 98 ]</p>

[Ian]

Ive read the pros and cons, and what the nay-sayers have to say about slotted and/or cross-drilled, and basically, i see it this way:

if exotic car manufactures still use high-quality cross-drilled and slotted rotors, there has to be something better about them.