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drilling stock rotors?
hi everyone! i work at a shop were we have a machine called a waterjet. this machine uses pressurized water to cut through almost anything. what i want to do is set it up to cut through the stock rotors and make them drilled rotors. so my question is if anyone has ever done anything like this or know if this is a bad idea. i dont want to ruin the integrity of the rotors so i just want to know if this is possible. im gonna practice on some other rotors i have lying aroung my house just to see if i can get the design down. so just let me know if im wasting my time and i should just save up and buy new ones or if i got something going here. thanks!
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Originally Posted by Irememberurface
hi everyone! i work at a shop were we have a machine called a waterjet. this machine uses pressurized water to cut through almost anything. what i want to do is set it up to cut through the stock rotors and make them drilled rotors. so my question is if anyone has ever done anything like this or know if this is a bad idea. i dont want to ruin the integrity of the rotors so i just want to know if this is possible. im gonna practice on some other rotors i have lying aroung my house just to see if i can get the design down. so just let me know if im wasting my time and i should just save up and buy new ones or if i got something going here. thanks!
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Bad idea. You will will compromising the structural integrity of the caliper, not to mention that you are reducing the surface area of your braking. Unless you are driving around in severely wet weather, and/or track your car all the time, you are compromising everyday braking for this. Either get a caliper that is specially made with drilled holes in them, or just get a nice set of powerslots.
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Waterjet sounds like a fun toy/tool, but don't do it to your brakes. *Assuming* you can make the holes without compromising the integrity of the disc, the benefits of X-drilling are dubious. you won't be saving much weight. the flipside is that with less mass your rotors will not be able to absorb as much heat from the pads. all this with the risk of premature crack propagation from the holes.
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If you can't figure out that this is a bad idea on your own, you will probably never be in a situation to take advantage of the (arguable) benifits drilled rotors provide. As much as it looks cool in super duper tuner street magazine, it's stupid on a street car, period.
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I liked it when the drilled and slotted ones catch fire. I read a good many horror stories about those.
But in response to the original post, don't do it. don't be that guy. holes can lead to cracking and other bad things. |
Please don't. I don't want to run over your shattered rotors.
On the other hand, if you can make that waterjet portable it would be fun for arses who park 1" off my door at the mall! |
Don't do it. If you want something that looks cool for street speeds, put down the cash and get the ones that are made to look good. Don't even think of using drilled rotors on the track.
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no
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Oh, he was talking about the brakes! I thought he was going to drill through the rotors in the engine to boost horsepower, increase gas mileage, dry it when it floods and give it that cool drilled rotor sound.
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Originally Posted by MX6_2_RX8
Oh, he was talking about the brakes! I thought he was going to drill through the rotors in the engine to boost horsepower, increase gas mileage, dry it when it floods and give it that cool drilled rotor sound.
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You get points for creativity but this would be a horrible idea.
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lol!! hi everyone. thanks for the honest criticism! much appreciated. it was just an idea i had that i though would be pretty cool but u guys are right and im glad i decided to ask and find out than just go through with it. i guess i was just really excited to use the machine and cut stuff that i didnt really think all the way through, but ill probably still buy some drilled/slotted brakes just for the cool factor. i like the way they look! ill just take it easy! lol.
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Originally Posted by Irememberurface
lol!! hi everyone. thanks for the honest criticism! much appreciated. it was just an idea i had that i though would be pretty cool but u guys are right and im glad i decided to ask and find out than just go through with it. i guess i was just really excited to use the machine and cut stuff that i didnt really think all the way through, but ill probably still buy some drilled/slotted brakes just for the cool factor. i like the way they look! ill just take it easy! lol.
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Originally Posted by Skythe
Rotors in the engine? Query, praytell...whereth are these rotors?
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http://www.mazda6tech.com/index.php?...d=19&Itemid=50
But what about cross drilled or slotted rotors? Well the common belief in the main stream is that somehow slotted or cross-drilled rotors allow for better performance by handling heat. This is 100 percent false. The individuals involved in such fallacies mention that air through the holes or slots work to cool the rotor (convective heat transfer into the air from the rotor). The issue is that from physics we know that metal transfers heat better then air by a significant amount. As such the larger mass of the rotor becomes more important then the larger surface area of the rotor in any situation other then the optimal. Cross drilling and slotting rotors are not optimal manners of creating metal to air transfer through larger surface areas. There is not much airflow through the holes or slots. Furthermore for cross drilling the holes will fill with brake dust in effect lowering the cooling ability of the rotors vanes they pass through. From the information above we can glean that the rotor begins to work as a heat sink. Now by cross drilling or slotting we are decreasing the overall amount of metal to transfer this heat to. Clearly we are decreasing performance of the rotor to dissipate heat amongst itself. Furthermore, the holes of a cross-drilled or slotted rotor decrease the area of the pad that contacts the rotor. This concentrates the heat more on certain areas of the pad, which has similar effects to that of using a smaller pad. As such the pad heats up more quickly. We are also damaging the brakes structural rigidity. The iron in a brake rotor is made of a crystalline structure. By drilling holes in said surface we cut the end grains creating a situation that breeds cracks. Furthermore, even if we were to cut the rotors correctly to avoid cutting the end grains structural rigidity is still decreased. The temperature around the holes will be slightly less then that of the entire rotor leading to temperature stress. Moreover, the decreased mass will result in lowered rigidity. http://www.nissanclub.com/forums/arc...ion.html?pp=15 |
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