cross-drilled and slotted rotors

[T2urtle]

i normally would say hell no to the thought as the cost is always higher then normal blank rotors.

I got a very nice deal sitting on the table for some R1 concept rotors and hawks HPS pads for a very nice price installed on my G35. The cost for all 4 rotors and pads would cost me roughly about 2 front blanks rotors and front HPS.

So now i want to consider them... I know really no performance gain and i dont care. But my main concern is that how well will it hold up in winter... these are zinc coated so no rust but i dont want to see my rotor crack in half or so i've heard from guys who run these in the winter... i'm in chicago so yea... SNOW SNOW and SNOW.

will these hold up? i never has these first hand, i drove a car with some and didn't notice a thing.

 

[Vette73]

I have soem D/S rotors for over a year and even with 100year snowstorm in N.VA/DC area they have held up just fine on my CTS.

I also got them more for looks than anything.

 

[EightySix Four]

You won't notice anything from the rotors, the pads will make a bigger difference. Personally I've seen small cracks on cross drilled rotors in Texas and have no interest in running them, but for that price, I don't see why not. Worst case is they last you a few years right?

 

[Viperoni]

Yes, drilled rotors are bad for street use, because they crack easily around the holes. Usually happens when you heat up the rotors hot and then get some water on them (IE: puddle) or snow, slush, etc. I've ruined a set myself, and now only ever go for slotted, or dimpled and slotted rotors.
I've got a set of EBC dimpled and slotted rotors on my car right now and they're great.

So remember: No to drilled rotors on the street.

 

[AMCRambler]

I've got a set on my GTO now. Same kind of deal as you. For drilled and slotted it was another $10 a rotor so I got it. Been on there for about a month and so far they're fine. Haven't noticed any cracking from puddles or otherwise.

One factor in this might be how big the rotor is. The ones on the GTO are massive and they've only got four drilled holes that are well spread across the surface of the rotor. Some of the other drilled sets I've seen they try and put as many tiny little pinholes in the rotors as they can and they look like swiss cheese. Here's a pic of what mine look like:

Now if they had more holes, closer spaced then I'm thinking they'd be more like to crack/split whatever since there's less metal to absorb the heat.

 

[AMCRambler]

Here's an example of what I'm thinking of when I say swiss cheese:

That rotor looks like it would rust out or crack in a winter or two in the North East.

 

[amdhunter]

I never really cared about the extra braking these rotors offered myself. I just like the looks. Is that bad?

 

[halik]

Here's an example of what I'm thinking of when I say swiss cheese:

That rotor looks like it would rust out or crack in a winter or two in the North East.

I guarantee you that one will not rust...

 

[lurk3r]

I've had mixed results, getting better crossdrilled rotors on my 95 avenger made an insane difference, like 10,000 miles per rotor to over 60,000. Bad rotors are bad, it dosent matter if you drill holes in crap, its still crap, so be careful with anything 'cheap'

 

[EightySix Four]

Here's an example of what I'm thinking of when I say swiss cheese:

That rotor looks like it would rust out or crack in a winter or two in the North East.

Lol, you're kidding right? That's a carbon ceramic set-up, it would have no problem with rust or cracking.

 

[WhoBeDaPlaya]

I've got a set from RotorPros on my LS. Like them so far and haven't had any issues going through a summer and winter.
Slotted/drilled rotors + pads + StopTech SS lines for $250 = bargain.

 

[JulesMaximus]

Here's an example of what I'm thinking of when I say swiss cheese:

That rotor looks like it would rust out or crack in a winter or two in the North East.

That's a ceramic composite disc. No way in hell that will rust or crack.

 

[AMCRambler]

Ah whatever. I happened to pick the one rotor that was on a Mclaren SLR. How's this one:

You get what I'm saying though right? Increase the surface area by putting a hundred tiny holes all over the rotor surface as well as drilling out lots of material from the rotor in more places and you will weaken the rotor and provide more surface to oxidize. It's asking for trouble.

This rotor has 120 drilled holes. Mine have 24 on the fronts.

 

[zerocool84]

these are zinc coated so no rust but i dont want to see my rotor crack in half or so i've heard from guys who run these in the winter... i'm in chicago so yea... SNOW SNOW and SNOW.

The zinc coating will come off right away.

 

[Vortex22]

I never really cared about the extra braking these rotors offered myself. I just like the looks. Is that bad?

They don't really offer any extra braking, just more surface area for faster cooling during hard (track) use. They do look cool though!

 

[T2urtle]

eh... i just scratched that idea... i think i rather play it safe with the normal SOLID rotors give my snowy climate. Last thing i want is a 3 peice SOLID rotor.

 

[The Boston Dangler]

if guys want them for looks, w/e. unless the car is on a track, i'm not sure what performance gains people expect over the factory brakes. i would describe the stock brakes' performance as "excellent" even after 4 years with my g35.

OP, i wouldn't be surprised if slotted and drilled rotors had a short life and poor performance in winter.

edit:
too slow

 

[T2urtle]

its wasn't for the looks, it wasn't for the gains, it was just an option that would of cost a nice amount less then what it would of cost me if i had to buy stock-like parts.

I would of easily pulled the trigger had i been in a state like texas but in chicago i had to think about it. My DD doesn't need to look bad like a race car, i'll roll with stocks like ones with HPS

 

[TehMac]

California's climate is perfect for sports cars. Too bad the political climate is another matter entirely.