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Old 05-20-2011, 05:30 PM   #1
M3Monsta
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Cross drilled Rotors?

Just a quick question, what is the difference between normal rotors and cross drilled? (Physical difference) And what are the differences in performance (if there are any)

Also, is there a big price jump?

Thanks.
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Old 05-20-2011, 05:34 PM   #2
OrientBlau
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There's blank (standard), drilled and slotted.

Blanks work the best. Period.


Blank:



Drilled:



Slotted:
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Old 05-20-2011, 05:36 PM   #3
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Quote:
Originally Posted by M3Monsta View Post
what is the difference between normal rotors and cross drilled? (Physical difference)
One has holes drilled through them, one is a solid piece of steel.

Quote:
Originally Posted by M3Monsta View Post
what are the differences in performance (if there are any)
From what I've seen, braking distance isn't decreased but the rotor can run cooler as it has more vents than the standard vented rotor.

Quote:
Originally Posted by M3Monsta View Post
Also, is there a big price jump?
Yes and no. Depends on brand, model, etc.
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Old 05-20-2011, 05:40 PM   #4
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There's blank (standard), drilled and slotted.

Blanks work the best. Period.
true, but they look so damn good

blank - best, reason they are stock

slotted - faster cooling, slightly less surface area than blanks

drilled - less surface area than blank's. faster to warm up and faster to cool down. possibility to crack with crazy heat on the track after alot of abuse

and they just look sooo much cooler

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Old 05-20-2011, 05:43 PM   #5
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So you say that I should get normal oem rotor over oem performance rotor ?
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Old 05-20-2011, 05:45 PM   #6
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^those are cast perforated rotors if I'm not mistaken. They don't have the weakness of cross drilled ones by design.
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Old 05-20-2011, 05:47 PM   #7
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the OEM performance ones are cast perforated?
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Old 05-20-2011, 05:49 PM   #8
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the OEM performance ones are cast perforated?
I was replying to your message with the picture of the Brembo kit. No idea about OEM perf ones
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Old 05-20-2011, 05:51 PM   #9
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I was replying to your message with the picture of the Brembo kit. No idea about OEM perf ones
That picture was for drool references only.
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Old 05-20-2011, 05:52 PM   #10
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Agreed. Drilled does look much better.
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Old 05-20-2011, 05:54 PM   #11
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Zimmermann products seems to be cast perforated (even if vendors advertise them as cross-drilled... marketing...)
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Old 05-20-2011, 06:04 PM   #12
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Slotted or not slotted are best. The cross drilled rotors have been known to crack between the holes and eventually grenade regardless of brand. I've seen Dba rotors go boom.
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Old 05-20-2011, 06:34 PM   #13
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Well im not planning on going to the track, just a couple street races here and there.

The drilled looks NICE though.
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Old 05-20-2011, 07:06 PM   #14
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drilled, the best performer, never going back no cracks
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Old 05-20-2011, 07:13 PM   #15
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drilled, the best performer, never going back no cracks
Drilled is NOT the best performer.
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Old 05-20-2011, 07:23 PM   #16
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What to expect with drilled:





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Old 05-20-2011, 07:50 PM   #17
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you only get cracks from low quality crossed drill. I forgot which one is better (cast vs drilled).
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Old 05-20-2011, 08:17 PM   #18
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Drilled is NOT the best performer.
This has been proven. It is not limited to less expensive brands either. Like I said, I've seen dba rotors do it too.
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Old 05-20-2011, 08:37 PM   #19
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I don't think having cross-drilled (or perforated) rotors fail is a COMMON problem. I mean, let's be honest, just about every single high-performance car comes with them standard.
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Old 05-20-2011, 08:39 PM   #20
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I don't think having cross-drilled (or perforated) rotors fail is a COMMON problem. I mean, let's be honest, just about every single high-performance car comes with them standard.
word x1000

it is all about how the rotors are made.
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