Cross Drilled and Sloted Do I need that?

[David Clayton]

I was just wondering is that somthing a guy would need on a daily driven street ride. Is it worh the extra money

[TonyL]

no. Actually it has been proven over and over that cross drilling is BAD for your rotors. It causes cracking. Slots are good for those who drive so hard that the gasses need a place to go. On a street car, regular disks are fine.

[Bandit]

Cross drilling is bad...mmkay? For racing, at least.

I have learned that crossdrilling has been carried over from the days of yore when racers used to drill their rotors to help vent off the gases that resulted from organic-type brake pads. It also helps braking on very wet road surfaces. But the benefits come at the cost of often cracked rotors. Modern racing pad compounds do not have significant offgassing problems and therefore drilling has become a non-issue for racing. There is also the minor (and it's very minor) benefit of reciprocating weight loss by drilling the rotors (think ounces), but the common opinion is that the weight benefit is offset by the loss of swept rotor area due to the holes. For the street, there is basically no performance advantage to using crossdrilled rotors--they are purely for looks. The look has become associated with "high-performance," although ironically, most pure race cars run solid rotors these days.

Well for street driving only it is very doubtful you would use them hard enough to cause cracking. So if you like the look of drilled rotors then go for it. I am using them on my car, and don't forsee any problems. But if you plan on road racing at all, where continued and sustained hard braking is the norm, then definitely go with solid or solid/slotted rotors.

[Steve1968LS2]

no. Actually it has been proven over and over that cross drilling is BAD for your rotors. It causes cracking. Slots are good for those who drive so hard that the gasses need a place to go. On a street car, regular disks are fine.

Slots are good.. holes, if done right, aren't as bad as people think. I beat the ever loving snot out of the drilled Wilwoods on my 2000 SS and never had a major crack. There were a few tiny fissures but never a crack.

For a street car that will occasionally see open track days drilled is fine. For any serious track car/race car then I would stay away from them.

If I was going to do something more serious with Penny than an open track day I would swap out my rotors for solid units. The holes are 90% for looks.

[chicane67]

Do a search on this subject... and you will find more that you would ever want to stomach in technical discussion.

[vanzuuk1]

I drill the rotors on all my plastic models and have yet to have a problem...

[LS6 Tommy]

Most of the "modern" pads don't really have a gassing problem. Slots and holes are more for show these days.

Tommy

[MrQuick]

hey, steves using them so they can't be all that bad.

[Steve1968LS2]

hey, steves using them so they can't be all that bad.

Was that sarcasm or are you trying to add to the discussion?

[Steve1968LS2]

Most of the "modern" pads don't really have a gassing problem. Slots and holes are more for show these days.

Tommy

I would agree in regards to holes, however slots still have a benefit.

[TnBlkC230WZ]

In theory, slots also have the added benefit of reducing the possibility of pad glazing.

[MrQuick]

Was that sarcasm or are you trying to add to the discussion? no, just being a post slut. :angel: must admit, im running a set too.

[ITLBTU]

The new Vettes come from the factory with them..:dunno: My '69 has them now too

[chicane67]

The new Vettes come from the factory with them..:dunno: My '69 has them now too

Bling is, as bling does...

Its sells parts and makes money.

[baz67]

The new Vettes come from the factory with them..:dunno: My '69 has them now too

So does Porshe and Ferarri, but does that make them better brakes. NO, it makes middle aged men with small... buy the cars because they look cool. Marketing at work. There is even a quote from one of the head guys from the C6 development team stating the drilled rotors are for looks only. Now take this test. Go to a real racetrack and see how many real racers use drilled rotors.

[ITLBTU]

I know they're "bling" I raced NASCAR short track for 8 years and I never had drilled rotors on my car... I may be middle aged, but my wife may argue your other point! :look: