Oh no not again. 
Cross drilled rotors?????
Thread Starter
Racer
Joined: Sep 2010
Posts: 259
Likes: 1
From: Mt Airy, NC
Cross drilled rotors?????
Any personal experiences of anybody using cross drilled rotors? I was just wondering if there was a noticeable difference in brake performance with a cross drilled rotor v/s stock rotors.
Melting Slicks
Joined: Mar 2002
Posts: 2,164
Likes: 7
From: Beringen
I believe its mostly for use with metallic brake pads to get rid of gas built up between the pad and rotor, but that's as much as i know about it.
Team Owner
Joined: Jun 2000
Posts: 38,923
Likes: 1,482
From: Southbound
Cruise-In II Veteran
Save your money. You only need cross drilled rotors when you are in to high speed, high brake heat applications. Most of us never get brake temperatures high enough to actually make use of the function of cross drilled rotors.
If you are autocrossing or road course racing, you could make use of them.
If you are autocrossing or road course racing, you could make use of them.
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
I have them. Are they needed? No. Will I ever need them, probably not. I needed new rotors and these looked a lot better but I have seen no difference in perfromance. Looks Yes. Peformance, not in 99% of the driving done here.
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Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
Please do a search- you'll see that this same question has been asked many many times over and usually leads into a steep downwards spiral that gets locked by the mods.
Hence the 'not again' Did you miss the smiley? ->
GM's own research (I've got the technical papers) concluded that there's no advantage to drilled or slotted rotors on a street driven car.
Hence the 'not again' Did you miss the smiley? ->
GM's own research (I've got the technical papers) concluded that there's no advantage to drilled or slotted rotors on a street driven car.
Burning Brakes
Joined: Oct 2003
Posts: 1,090
Likes: 74
From: New Carlisle IN
I agree that Drilled rotors are of no performance advantage. They are only for looks on cars with open spoke designed wheels. Even in a racing application, drilled rotors do not help you. The drilled and sloted rotros were designed to help gas from the old organic pads that builds up between the pads and rotor. With todays brake pads, there isn't much gas that will build up on your pads to need a way to get it out. Most drilled rotors will crack between the holes when used for racing due to the high heat. Most of your top level racing series (ALMS, Grand Am, Trans Am, WC, NASCAR, etc) only use sloted rotors.
Save your money and just put solid rotors on unless you like the looks of drilled rotors behind your wheels.
Save your money and just put solid rotors on unless you like the looks of drilled rotors behind your wheels.
Le Mans Master
Joined: Oct 2007
Posts: 7,455
Likes: 977
From: RI, Now Franklin/Nashville TN
Please do a search- you'll see that this same question has been asked many many times over and usually leads into a steep downwards spiral that gets locked by the mods.
Hence the 'not again' Did you miss the smiley? ->
GM's own research (I've got the technical papers) concluded that there's no advantage to drilled or slotted rotors on a street driven car.
Hence the 'not again' Did you miss the smiley? ->
GM's own research (I've got the technical papers) concluded that there's no advantage to drilled or slotted rotors on a street driven car.
Race Director
Joined: Jan 2000
Posts: 12,399
Likes: 247
From: San Jose CA
Le Mans Master
Joined: Oct 2007
Posts: 7,455
Likes: 977
From: RI, Now Franklin/Nashville TN
I have drilled/slotted rotors on my 2001 pontiac Grand prix and my 1994 Mustang GT both cars which have too small rotors and single piston calipers to stop 3,500 LB vehicles. Did they improve the braking?- absolutely especially from high speed and in the rain. They prevent brake pad "gas float" between the rotor and the pad and shed water better from the rotor as well.
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
The ORIGINAL and bestest
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From: Toronto Ontario
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Melting Slicks
Joined: Jan 2003
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From: Shreveport LA
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Thread Starter
Racer
Joined: Sep 2010
Posts: 259
Likes: 1
From: Mt Airy, NC
If you gave helpful advice or just your opinion on slotted rotors it was greatly appreciated. In the future I will try to never ask another question without pouring over the archives to make sure it has never been asked before so as not to agitate anyone.
