If cross-drilled disks are so bad...
#1
Registered
Thread Starter
If cross-drilled disks are so bad...
if cross drilled brake discs are so bad, why do almost all manufacturers use them for their brake packages?
for example, porsche, bmw, lamborghini, mercedes, aston martin, etc all have cross drilled brake discs
only aston martin has slotted brake discs on some of its cars
aren't cross drilled brake discs more prone to cracking than slotted ones?
or does it even matter if they are high quality brake discs?
also does it matter if carbon ceramic brakes are cross drilled? do they crack?
for example, porsche, bmw, lamborghini, mercedes, aston martin, etc all have cross drilled brake discs
only aston martin has slotted brake discs on some of its cars
aren't cross drilled brake discs more prone to cracking than slotted ones?
or does it even matter if they are high quality brake discs?
also does it matter if carbon ceramic brakes are cross drilled? do they crack?
#4
Most of the cars also use either carboceramic discs or plain\slotted metal one when they are actually raced.
http://photos.motoiq.com/MotoIQ/Feat...38_YJmAZ-L.jpg
http://cache.gawker.com/assets/image...esta09-112.jpg
http://www.speedhunters.com/wp-conte...859_1zJe_2.jpg
http://blog.mercedes-benz-passion.co...2C1041_100.jpg
http://photos.motoiq.com/MotoIQ/Feat...38_YJmAZ-L.jpg
http://cache.gawker.com/assets/image...esta09-112.jpg
http://www.speedhunters.com/wp-conte...859_1zJe_2.jpg
http://blog.mercedes-benz-passion.co...2C1041_100.jpg
#6
if cross drilled brake discs are so bad, why do almost all manufacturers use them for their brake packages?
for example, porsche, bmw, lamborghini, mercedes, aston martin, etc all have cross drilled brake discs
only aston martin has slotted brake discs on some of its cars
aren't cross drilled brake discs more prone to cracking than slotted ones?
or does it even matter if they are high quality brake discs?
also does it matter if carbon ceramic brakes are cross drilled? do they crack?
for example, porsche, bmw, lamborghini, mercedes, aston martin, etc all have cross drilled brake discs
only aston martin has slotted brake discs on some of its cars
aren't cross drilled brake discs more prone to cracking than slotted ones?
or does it even matter if they are high quality brake discs?
also does it matter if carbon ceramic brakes are cross drilled? do they crack?
Guy I know had a number of hot street cars, and raced a Panoz Esperante. I asked him one day why all the street cars had drilled and slotted rotors, and the Panoz was slotted only. He took me to a bench where he had drilled rotors off the Panoz sitting around, and every single hole had heat stress cracks spidering out in every direction. His point was that for street use, drilled is ok, but the heat of track use didn't get along with the drilled units. And since at least some of the point of drilling is supposed to be heat dissipation, it sort of makes them for appearance only., IMO.
#7
Moder8
iTrader: (1)
They are not bad,
Just get some of these to go with them.
Cross Drilled Brake Lines - $72.95 : KaleCoAuto.com, Your home for the rare, unusual, and hard to find auto parts.
Just get some of these to go with them.
Cross Drilled Brake Lines - $72.95 : KaleCoAuto.com, Your home for the rare, unusual, and hard to find auto parts.
#8
weeeeeeeeee
iTrader: (12)
Perfect addition would be the mother of all subs: Mother of all Subwoofers - $8,260,000.25 : KaleCoAuto.com, Your home for the rare, unusual, and hard to find auto parts. ... a mere 8.2 million dollars
#9
Registered
Thread Starter
Perfect addition would be the mother of all subs: Mother of all Subwoofers - $8,260,000.25 : KaleCoAuto.com, Your home for the rare, unusual, and hard to find auto parts. ... a mere 8.2 million dollars
#12
Registered
I'd be curious to know if the cross drilled rotors that are having stress cracks around the holes merely have holes drilled through them or if the edge of each hole is carefully chamfered. Even if they are, they won't be chamfered on the inside in the vents. This will be the source of cracking. Anywhere there is an edge, there is higher stress. It's even the main reason airliners have rounded corner windows.
#13
Registered
Thread Starter
I'd be curious to know if the cross drilled rotors that are having stress cracks around the holes merely have holes drilled through them or if the edge of each hole is carefully chamfered. Even if they are, they won't be chamfered on the inside in the vents. This will be the source of cracking. Anywhere there is an edge, there is higher stress. It's even the main reason airliners have rounded corner windows.
#15
Registered
mostly for looks.
however higher brand cars probably use better material but doesnt mean they also dont crack. the problem is most rich people dont service their cars their own so they just bring it in.
BMW suggest changing the rotors with the pads everytime where others just true the rotors and put on new pads and call it good.
it all boils down to affordability. I dont think any $100k-$200k car owners will mind some $1000-$2000 rotor replacement.
however higher brand cars probably use better material but doesnt mean they also dont crack. the problem is most rich people dont service their cars their own so they just bring it in.
BMW suggest changing the rotors with the pads everytime where others just true the rotors and put on new pads and call it good.
it all boils down to affordability. I dont think any $100k-$200k car owners will mind some $1000-$2000 rotor replacement.
#19
Momentum Keeps Me Going
Disc Surface Finish - RacingBrake.com
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