Brake Rotor Safety Question????
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Brake Rotor Safety Question????
Hi all, I am looking to purchase a set of cross-drilled and vented rotors. I need to be 100% positive that these are safe to use on the street for daily driving. Do these meet the Criteria with this rating? ----------------ISO9002/QS9000VDA6.1 Thanks all. Sixty4.
Burnout
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From: South Surrey (White Rock) British Columbia
Rotors
Try baer drilled and slotted eradispeed, I've had mine over a year and they are great.
I think their site is http://www.baer.com
ask them if they meet your specs.
mrgil
I think their site is http://www.baer.com
ask them if they meet your specs.
mrgil
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Originally Posted by mrgil
Try baer drilled and slotted eradispeed, I've had mine over a year and they are great.
I think their site is http://www.baer.com
ask them if they meet your specs.
mrgil
I think their site is http://www.baer.com
ask them if they meet your specs.
mrgil
Good choice. Order them "slotted only" if you are concerned about heat cracking around holes. Baer will provide them that way at no additional charge.Not having read the various ISO standards, etc. I cannot speak to them.
HTH,
Robert
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From: San Diego CA
Ideally, you'd want maximum surface area for braking and rotors that don't accumulate uneven pad deposits. According to PowerSlot:
"Drilled OE sized rotors may look cool, but they are not a good choice for performance or severe duty driving. When you drill an OE sized rotor, you weaken it and cause stress points that may lead to cracking. Drilled rotors lose considerable surface area and mass compared to slotted rotors. That means less active braking area for the pad to make contact on the rotor. Our VACUSLOT slotting pattern, unlike drilling, doesn’t compromise the structural integrity of the rotor. Ultimately the choice is yours. Regardless of whether you choose a slotted or drilled rotor, make sure you get the highest quality casting. Don't use an economy offshore rotor in a severe-duty or performance application."
Regarding braking surface area:
Slotted rotors maintain 96% of active braking area.
Drilled rotors maintain 85-93% of active braking area and
Drilled and slotted maintain only 80-90% of active braking area.
Drilled and slotted are kinda like getiing a rear wing for a C5 - may look like some sort of racing aid, but in reality just cuts back on fuel mileage!
Of course, beauty is in the eye of the beholder.
"Drilled OE sized rotors may look cool, but they are not a good choice for performance or severe duty driving. When you drill an OE sized rotor, you weaken it and cause stress points that may lead to cracking. Drilled rotors lose considerable surface area and mass compared to slotted rotors. That means less active braking area for the pad to make contact on the rotor. Our VACUSLOT slotting pattern, unlike drilling, doesn’t compromise the structural integrity of the rotor. Ultimately the choice is yours. Regardless of whether you choose a slotted or drilled rotor, make sure you get the highest quality casting. Don't use an economy offshore rotor in a severe-duty or performance application."
Regarding braking surface area:
Slotted rotors maintain 96% of active braking area.
Drilled rotors maintain 85-93% of active braking area and
Drilled and slotted maintain only 80-90% of active braking area.
Drilled and slotted are kinda like getiing a rear wing for a C5 - may look like some sort of racing aid, but in reality just cuts back on fuel mileage!
Of course, beauty is in the eye of the beholder.
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I've had my Baer Eradispeeds for well over two years now and they are doing just fine in normal driving.
Pro
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ISO9002 and QS9000 are standards used by the Big 3 automakers to ensure that their suppliers all meet certain quality requirements. Some of these requirements are fit, form and function. I work for a Tier 1 supplier that produces engine timing components, but I would assume that for rotors this would include diminsional criteria, as well as metalurgical properties. I guess my short answer would be that these should be at least as good as OEM.
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I have decided to go with the Baer Eridispeed front and rear rotors for the vette. Now I just need to find a supporting vendor who has them at a fair price. I have noticed these are priced all over with wild price swings. For all that purchased these where did you purchase from? Thanks Mark Sixty4. 
I would be very happy with the 1 piece rotors. It will be more show than go.
I would be very happy with the 1 piece rotors. It will be more show than go.
Last edited by Comp Cam 1; Jul 15, 2006 at 12:17 PM.
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I had the same Questions. This is what the world famous John Z and technical advisor for Corvette Enthusiast Magazine Had to say on this subject for the C6 rotors.
True - however, those rotors have the holes cast-in first, then the holes are finish-machined, to minimize formation of stress risers at the junction of the holes with the inner and outer surfaces. Most of the "hot-rod" drilled rotors in the aftermarket just have the holes drilled in a solid-surface rotor, which is guaranteed to form stress risers and cracks with thermal cycling. Slotted rotors are far more durable and reliable than cross-drilled rotors under severe usage
True - however, those rotors have the holes cast-in first, then the holes are finish-machined, to minimize formation of stress risers at the junction of the holes with the inner and outer surfaces. Most of the "hot-rod" drilled rotors in the aftermarket just have the holes drilled in a solid-surface rotor, which is guaranteed to form stress risers and cracks with thermal cycling. Slotted rotors are far more durable and reliable than cross-drilled rotors under severe usage
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I think you are correct. Don't look for a deal on Ebay from someone who just sells brake rotors at a cheap price. You always get what you pay for IMHO. For me they will be more show than go. However with that being said I think the Baer will do the job just fine. I have not priced out the Brembos.
Last edited by Comp Cam 1; Jul 15, 2006 at 01:04 PM.
Le Mans Master
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From: Norfolk VA
Originally Posted by vintage driver
If drilled rotors are so bad then why do the new C6 and new Z's come with them from the factory?
if x-drilled/slotted rotors are so good, why doesn't the C5-R/C6.R use them?
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From: Dear Karma, I have a list of people you missed.
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Originally Posted by sixty4
I have decided to go with the Baer Eridispeed front and rear rotors for the vette. Now I just need to find a supporting vendor who has them at a fair price. I have noticed these are priced all over with wild price swings. For all that purchased these where did you purchase from? Thanks Mark Sixty4.
I would be very happy with the 1 piece rotors. It will be more show than go.
I would be very happy with the 1 piece rotors. It will be more show than go.
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From: The second childhood is the best one of all.
Originally Posted by sixty4
Hi all, I am looking to purchase a set of cross-drilled and vented rotors. I need to be 100% positive that these are safe to use on the street for daily driving. Do these meet the Criteria with this rating? ----------------ISO9002/QS9000VDA6.1 Thanks all. Sixty4.
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From: San Diego CA
Originally Posted by Lancer033
for the same reason that Porsche and Ferrari have them. That's what the uninformed public wants. Porsche warns owners to check on the rotors if they are used at the track. The rotors on the Nurburgring Taxi (BMW M5, professional driver) have to be replaced every 10 laps
if x-drilled/slotted rotors are so good, why doesn't the C5-R/C6.R use them?
if x-drilled/slotted rotors are so good, why doesn't the C5-R/C6.R use them?
Good point. Why buy something that may be dangerous on the track? That's like buying S-rated tires (118 MPH max) and justifying the purchase by saying, "Why should I spend the money for better tires when I never exceed 80 MPH?"
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Originally Posted by Lancer033
for the same reason that Porsche and Ferrari have them. That's what the uninformed public wants.
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Originally Posted by Notch
No, it's what the *informed* public wants...Porsche's testing show that the holes in the disc account for an additional cooling of over 90 degrees Fahrenheit versus solid discs. The holes also aid with water evaporation.
