StopTech BBK finally installed! Pics on PG 4
11-21-2005, 09:00 PM
#61
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drilled rotors are the worst
do not ever get drilled rotors. a lot of of other forums/cars, especially brembo brakes, the drilled rotors crack with heavy stress. thats why stoptech and powerslot only uses slotted. if you drill them, you are actualy taking away rotor mass which in turn weakens the rotor and under heavey stress and heat, and quicker cooling... this causes the rotor to warp or crack which is a no no.
slotted is the only way to go.. drilled if u want to use brakes for show.
do not ever get drilled rotors. a lot of of other forums/cars, especially brembo brakes, the drilled rotors crack with heavy stress. thats why stoptech and powerslot only uses slotted. if you drill them, you are actualy taking away rotor mass which in turn weakens the rotor and under heavey stress and heat, and quicker cooling... this causes the rotor to warp or crack which is a no no.
slotted is the only way to go.. drilled if u want to use brakes for show.
11-21-2005, 10:12 PM
#62
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Thats not 100% true but close. There are times when drilled rotors are chosen over slotted. A great example is one of out race teams who wanted more rear bite and they already had very aggerssive rear pads. By going to a drilled rear rotor they were able to attain the added bite they were looking for. Since it was a rear application there wasnt the extreme heat generated the front rotors would be subject to so they lasted just fine. Race applications are also a different story where rotors are wear items like tires and are replaced for every event and sometime multiple times over a race weekend.
On the street, our drilled rotors have not had any problems with cracking due to heat cycling and we have no concerns about a daily driver running drilled rotors. The only time we dont reccomend drilled is for track use when cracking becomes an issue.
On the street, our drilled rotors have not had any problems with cracking due to heat cycling and we have no concerns about a daily driver running drilled rotors. The only time we dont reccomend drilled is for track use when cracking becomes an issue.
11-21-2005, 10:20 PM
#63
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To add a little tidbit:
Drilled rotors were originally drilled to serve two purposes, increased pad bite, and more importantly, decreased unsprung weight. With less overall material, a lot of times, drilled rotors actually have a poorer heat capacity than a solid rotor of the same size. Drilled rotors used to be favored as they theoretically help with acceleration the same way a lightened pulley would help with acceleration. The problem with is that in order to obtain a satisfactory increase in acceleration, so much of the material of the rotor would have to be drilled out that for one, brake performance would decrease considerably, and two, that increased "bite" will put such a strain on the rotor that it could very easily crack.
Now, people on street cars like drilled rotors primarily for looks - as been said. Street cars generally don't take the kinds of abuse that track cars take (except perhaps for the Vitz cup.. with little 1NZ engines I bet those brakes are barely warmer than ambient temperature after a day's worth of braking
) so cracking shouldn't be a problem for a driver like me and most other individuals. Still, there is the benefit of less unsprung weight on the wheels. With the increased bite and low weight rotors, braking performance generally increases with drilled rotors. However, the performance increase would be akin to the performance increase of a functional spoiler. Benefits are primarily marginal.
That is not to say swapping out for slotted rotors would be a huge increase in performance. On street cars, the primary benefit would be rotors that are cleaned easily due to the slots. Also, the slots work almost like treads on the tires - when it rains, rather than form a film under the calipers during braking, water gets pushed into the channels and wisked off towards the edge of the rotors as the rotors spin. Drilled rotors have this benefit too but to a slightly lesser degree. Again, on a street car, benefits would be marginal.
Potential would be much higher though.
The_Instigator recently was on a track in an entirely streetable car. Things may have gotten precarious had he been using drilled rotors. The stock rotors were solid so they were never in much danger. The pads had relatively little surface area but they seemed to last pretty well, although, brake fade was apparent. This fade would not have been an issue for drilled brakes as the heat "cushion" under the pads would have been pushed into the drill holes and ventilated through the center. Slotted rotors would provide exactly the same benefit by allowing the heat to channel through the vanes. Once again, it will be a precarious situation for the drilled rotors to undergo too much of this level of abuse though.
Bottom line, for all intents and purposes of regular drivers, BBKs, drilled, slotted, or solid, are rice. But for drivers who plan on doing some performance running that involves turning that nice steering wheel that drag racers don't use very often, drilled rotors might be a liability whereas slotted rotors are going to be a solid choice.
To address the advantage the drilled rotors may have over slotted rotors, the StopTech BBK slotted rotors are lighter than the OEM rotors so they will save some unsprung weight. Drilled rotors will save more but.. it's your call.
That percentage I want is 50% but I'm willing to lower it to just a 10% discount :D :D :D :D
5%?
Drilled rotors were originally drilled to serve two purposes, increased pad bite, and more importantly, decreased unsprung weight. With less overall material, a lot of times, drilled rotors actually have a poorer heat capacity than a solid rotor of the same size. Drilled rotors used to be favored as they theoretically help with acceleration the same way a lightened pulley would help with acceleration. The problem with is that in order to obtain a satisfactory increase in acceleration, so much of the material of the rotor would have to be drilled out that for one, brake performance would decrease considerably, and two, that increased "bite" will put such a strain on the rotor that it could very easily crack.
Now, people on street cars like drilled rotors primarily for looks - as been said. Street cars generally don't take the kinds of abuse that track cars take (except perhaps for the Vitz cup.. with little 1NZ engines I bet those brakes are barely warmer than ambient temperature after a day's worth of braking
) so cracking shouldn't be a problem for a driver like me and most other individuals. Still, there is the benefit of less unsprung weight on the wheels. With the increased bite and low weight rotors, braking performance generally increases with drilled rotors. However, the performance increase would be akin to the performance increase of a functional spoiler. Benefits are primarily marginal. That is not to say swapping out for slotted rotors would be a huge increase in performance. On street cars, the primary benefit would be rotors that are cleaned easily due to the slots. Also, the slots work almost like treads on the tires - when it rains, rather than form a film under the calipers during braking, water gets pushed into the channels and wisked off towards the edge of the rotors as the rotors spin. Drilled rotors have this benefit too but to a slightly lesser degree. Again, on a street car, benefits would be marginal.
Potential would be much higher though.
The_Instigator recently was on a track in an entirely streetable car. Things may have gotten precarious had he been using drilled rotors. The stock rotors were solid so they were never in much danger. The pads had relatively little surface area but they seemed to last pretty well, although, brake fade was apparent. This fade would not have been an issue for drilled brakes as the heat "cushion" under the pads would have been pushed into the drill holes and ventilated through the center. Slotted rotors would provide exactly the same benefit by allowing the heat to channel through the vanes. Once again, it will be a precarious situation for the drilled rotors to undergo too much of this level of abuse though.
Bottom line, for all intents and purposes of regular drivers, BBKs, drilled, slotted, or solid, are rice. But for drivers who plan on doing some performance running that involves turning that nice steering wheel that drag racers don't use very often, drilled rotors might be a liability whereas slotted rotors are going to be a solid choice.
To address the advantage the drilled rotors may have over slotted rotors, the StopTech BBK slotted rotors are lighter than the OEM rotors so they will save some unsprung weight. Drilled rotors will save more but.. it's your call.
That percentage I want is 50% but I'm willing to lower it to just a 10% discount :D :D :D :D
5%?
11-21-2005, 11:59 PM
#65
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Originally Posted by kungpaosamuraiii
...The_Instigator recently was on a track in an entirely streetable car. Things may have gotten precarious had he been using drilled rotors. The stock rotors were solid so they were never in much danger. The pads had relatively little surface area but they seemed to last pretty well, although, brake fade was apparent. This fade would not have been an issue for drilled brakes as the heat "cushion" under the pads would have been pushed into the drill holes and ventilated through the center. Slotted rotors would provide exactly the same benefit by allowing the heat to channel through the vanes. Once again, it will be a precarious situation for the drilled rotors to undergo too much of this level of abuse though.
11-22-2005, 06:28 AM
#67
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LOL..no its good to get the information out there. Sometimes the best info is hard to get out if nobody asks the questions. Theres a lot of misconceptions about brake systems and the more dialog there is about them the more everybody learns and benefits. Ive only been with StopTech for a few months and have learned so much its ridiculous and I still find myself learning new things everyday. Ive also read through all of our white papers here: http://www.stoptech.com/tech_info/te...e_papers.shtml and I swear I pick up another tibit everytime I read through them.
11-22-2005, 07:29 PM
#73
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Originally Posted by ColeGSC
Yer missing some lugnuts....i wouldn't drive like that.
You could buy them from us for 1650$ shipped!
thats for the big brake kit with slotted rotors and without the zinc coating.
You could buy them from us for 1650$ shipped!
thats for the big brake kit with slotted rotors and without the zinc coating.
11-23-2005, 05:27 AM
#79
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Originally Posted by davedavetC
so when are you getting these bad boys put on for good?