Ebay brake rotors
08-13-06, 07:01 PM
#1
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Ebay brake rotors
Yes, I searched, but there really isn't a whole lot of information out there. So I'm resurrecting those threads again into this one.
Have anyone tried Ebay rotors? Experiences? Obviously, they're significantly cheaper than others, but do they hold up well? Are they durable (do they crack or anything?)
Examples:
r1concepts rotors $119.99 + shipping
http://cgi.ebay.com/ebaymotors/Mazda...16625675QQrdZ1
unitimports rotors $142.99
http://cgi.ebay.com/ebaymotors/86-88...14035656QQrdZ1
v12motorsports rotors $139.00 + shipping
http://cgi.ebay.com/ebaymotors/Mazda...17810325QQrdZ1
irotors rotors $189.00 + shipping
http://cgi.ebay.com/ebaymotors/Mazda...14355522QQrdZ1
Have anyone tried Ebay rotors? Experiences? Obviously, they're significantly cheaper than others, but do they hold up well? Are they durable (do they crack or anything?)
Examples:
r1concepts rotors $119.99 + shipping
http://cgi.ebay.com/ebaymotors/Mazda...16625675QQrdZ1
unitimports rotors $142.99
http://cgi.ebay.com/ebaymotors/86-88...14035656QQrdZ1
v12motorsports rotors $139.00 + shipping
http://cgi.ebay.com/ebaymotors/Mazda...17810325QQrdZ1
irotors rotors $189.00 + shipping
http://cgi.ebay.com/ebaymotors/Mazda...14355522QQrdZ1
08-13-06, 11:43 PM
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Well I got mine off eBay and they work very well. They are drilled and slotted and I’m using hawk pad on them they seem to stop well but I’m using single caliper setup.
Last edited by JABrx7; 08-14-06 at 12:03 AM.
08-14-06, 12:09 AM
#5
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Well, drilled and slotted rotors aren't a performance item, they're for looks only. They have less swept area for the pads to grab onto, meaning you get less braking force than before. Drilled rotors are also more prone to cracking with hard use.
If you want cheap rotors, just go to NAPA or some other auto parts store. You can get rotors for about $21 each.
http://www.napaonline.com/masterpage...r+Only+-+Front
http://www.napaonline.com/masterpage...or+Only+-+Rear
If you want cheap rotors, just go to NAPA or some other auto parts store. You can get rotors for about $21 each.
http://www.napaonline.com/masterpage...r+Only+-+Front
http://www.napaonline.com/masterpage...or+Only+-+Rear
08-14-06, 12:10 AM
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I bought some crossed drilled and slotted rotors from R1concepts, they are pretty good and the finish on them is nice. When i got them installed they had to slightly adjust the rear piston in the caliper a little since i think the rear ones from R1 are a little bit wider than the stock ones and they haven't given me any problems at all. I have a 91 coupe with the four caliper fronts and vented rears and im running EBC green stuff pads.
08-14-06, 12:52 AM
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Originally Posted by Black91n/a
Well, drilled and slotted rotors aren't a performance item, they're for looks only. They have less swept area for the pads to grab onto, meaning you get less braking force than before. Drilled rotors are also more prone to cracking with hard use.
If you want cheap rotors, just go to NAPA or some other auto parts store. You can get rotors for about $21 each.
http://www.napaonline.com/masterpage...r+Only+-+Front
http://www.napaonline.com/masterpage...or+Only+-+Rear
If you want cheap rotors, just go to NAPA or some other auto parts store. You can get rotors for about $21 each.
http://www.napaonline.com/masterpage...r+Only+-+Front
http://www.napaonline.com/masterpage...or+Only+-+Rear
Hmm...didn't know NAPA had rotors for prices like that. I might just have to look into those...
I've heard there can be some performance gains in slotting rotors. Will they be noticible/significant? Doubtful. Thanks for the input though.
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08-14-06, 01:12 AM
#8
Originally Posted by Black91n/a
Well, drilled and slotted rotors aren't a performance item, they're for looks only. They have less swept area for the pads to grab onto, meaning you get less braking force than before. Drilled rotors are also more prone to cracking with hard use.
If you want cheap rotors, just go to NAPA or some other auto parts store. You can get rotors for about $21 each.
http://www.napaonline.com/masterpage...r+Only+-+Front
http://www.napaonline.com/masterpage...or+Only+-+Rear
If you want cheap rotors, just go to NAPA or some other auto parts store. You can get rotors for about $21 each.
http://www.napaonline.com/masterpage...r+Only+-+Front
http://www.napaonline.com/masterpage...or+Only+-+Rear
and if they are so inferior, why does mercades put them on their top models?? everyone talks crap about cross-drill... but if companies like mercades are putting them on their 100k cars, ill trust them before i trust anyone on this forum...
08-14-06, 06:10 AM
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Originally Posted by Black91n/a
Well, drilled and slotted rotors aren't a performance item, they're for looks only.
You are wrong.
I've only ever used Brembo xdrilled rotors and the difference from the stock rotors was amazing. The life of the rotors was significantly increased, no warping, stopping power was largely increased (also due to good pads and fresh calipers), less brake fade, etc.
I'd be wary of cheap rotors, slotted, drilled, or solid.
08-14-06, 10:10 AM
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Originally Posted by vipers
if they are so inferior, why does mercades put them on their top models?? everyone talks crap about cross-drill... but if companies like mercades are putting them on their 100k cars, ill trust them before i trust anyone on this forum...
08-14-06, 01:39 PM
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They most certainly cater to fashion and by all means, a nice big set of xdrilled rotors on that Porsche or Benz absolutely accents the look of the vehicle and makes one say "cool!" However, that doesn't mean they are not a performance item or inferior to stock rotors.
"Performance" isn't just about going faster. If you go faster you better be able to stop better.
"Performance" isn't just about going faster. If you go faster you better be able to stop better.
08-14-06, 02:04 PM
#13
I'm not going to take sides on slotted or xdrilled rotors are a performance enhancement or not... but from observation and a tiny bit of experience with xdrill/slotted brembos, they do feel a lot better than stock. Plus, all the pro race guys have slotted/drilled rotors... it must do something. Tho i've read some stuff that say that they ARE for show more so than performance, because the heat dispation will be very close to the same as stock rotors. Thats only what I remember reading so don't take my word for it.
08-14-06, 02:45 PM
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To summerize some key points in past threads:
From https://www.rx7club.com/showthread.p...ht=ebay+brakes
Tire Rack article on cross drilled/slotted rotors
http://www.tirerack.com/brakes/tech/....jsp?techid=87
From https://www.rx7club.com/showthread.p...ht=ebay+rotors
A little food for thought.
Originally Posted by Icemark
cross drilled rotors are really for street use for FC.
Just go down to your local auto parts store and get conventional discs there. Cheaper and you don't have to worry about the rotor exploding.
Originally Posted by Karack
exploding? lol
yeah, I have seen some cheap cross drilled rotors look like they explode apart on some FWD cars when they got over heated.
People need to remember that a lot of the "Performance" stuff sold on ebay is really cheap crap that would never pass manufactures inspection on even a korean car. Many of the things sold there are down right unsafe (like the 4 point "racing seat belts" that have a small simple conventional lock clasp, that wouldn't pass DOT inspection if your doubled them).
cross drilled rotors are really for street use for FC.
Just go down to your local auto parts store and get conventional discs there. Cheaper and you don't have to worry about the rotor exploding.
Originally Posted by Karack
exploding? lol
yeah, I have seen some cheap cross drilled rotors look like they explode apart on some FWD cars when they got over heated.
People need to remember that a lot of the "Performance" stuff sold on ebay is really cheap crap that would never pass manufactures inspection on even a korean car. Many of the things sold there are down right unsafe (like the 4 point "racing seat belts" that have a small simple conventional lock clasp, that wouldn't pass DOT inspection if your doubled them).
Tire Rack article on cross drilled/slotted rotors
http://www.tirerack.com/brakes/tech/....jsp?techid=87
Excerpt taken from the February 2001 issue of Grassroots Motorsports magazine:
(Full copy of text can be seen here: http://www.mr2sc.com/)
Crossdrilling your rotors might look neat, but what is it really doing for you? Well,unless your car is using brake pads from the ‘40s and ‘50s, not a whole lot. Rotors were first drilled because early brake pad materials gave off gasses when heated to racing temperatures, a process known as "gassing out." These gasses then formed a thin layer between the brake pad face and the rotor, acting as a lubricant and effectively lowering the coefficient of friction. The holes were implemented to give the gasses somewhere to go. It was an effective solution, but today's friction materials do not exhibit the same gassing out phenomenon as the early pads. For this reason, the holes have carried over more as a design feature than a performance feature. Contrary to popular belief, they don't lower temperatures. (In fact, by removing weight from the rotor, they can actually cause temperatures to increase a little.) These holes create stress risers that allow the rotor to crack sooner, and make a mess of brake pads - sort of like a cheesegrater rubbing against them at every stop. Want more evidence? Look at NASCAR or Fl. You would think that if drilling holes in the rotor was the hot ticket, these teams would be doing it. The one glaring exception here is in the rare situation where the rotors are so oversized that they need to be drilled like Swiss cheese. (Look at any performance motorcycle or lighter formula car, for an example.) While the issues of stress risers and brake pad wear are still present, drilling is used to reduce the mass of the parts in spite of these concerns. Remember that nothing comes for free. If these teams switched to non-drilled rotors, they would see lower operating temperatures and longer brakepad life, at the expense of higher weight. It’s all about tradeoffs. Slotting rotors, on the other hand, might be a consideration if your sanctioning body allows for it. Cutting thin slots across the face of the rotor can actually help to clean the face of the brake pads over time, helping to reduce the glazing often found during high-speed use which can lower the coefficient of friction. While there may still be a small concern over creating stress risers in the face of the rotor, if the slots are shallow and cut properly, the trade-off appears to be worth the risk. (Have you looked at a NASCAR rotor lately?) If you need to worry about brake pad degassing, then go with slotted rotors. Slotting is a much more superior way of preventing decreased brake performace due to brake pad degassing.
(Full copy of text can be seen here: http://www.mr2sc.com/)
Crossdrilling your rotors might look neat, but what is it really doing for you? Well,unless your car is using brake pads from the ‘40s and ‘50s, not a whole lot. Rotors were first drilled because early brake pad materials gave off gasses when heated to racing temperatures, a process known as "gassing out." These gasses then formed a thin layer between the brake pad face and the rotor, acting as a lubricant and effectively lowering the coefficient of friction. The holes were implemented to give the gasses somewhere to go. It was an effective solution, but today's friction materials do not exhibit the same gassing out phenomenon as the early pads. For this reason, the holes have carried over more as a design feature than a performance feature. Contrary to popular belief, they don't lower temperatures. (In fact, by removing weight from the rotor, they can actually cause temperatures to increase a little.) These holes create stress risers that allow the rotor to crack sooner, and make a mess of brake pads - sort of like a cheesegrater rubbing against them at every stop. Want more evidence? Look at NASCAR or Fl. You would think that if drilling holes in the rotor was the hot ticket, these teams would be doing it. The one glaring exception here is in the rare situation where the rotors are so oversized that they need to be drilled like Swiss cheese. (Look at any performance motorcycle or lighter formula car, for an example.) While the issues of stress risers and brake pad wear are still present, drilling is used to reduce the mass of the parts in spite of these concerns. Remember that nothing comes for free. If these teams switched to non-drilled rotors, they would see lower operating temperatures and longer brakepad life, at the expense of higher weight. It’s all about tradeoffs. Slotting rotors, on the other hand, might be a consideration if your sanctioning body allows for it. Cutting thin slots across the face of the rotor can actually help to clean the face of the brake pads over time, helping to reduce the glazing often found during high-speed use which can lower the coefficient of friction. While there may still be a small concern over creating stress risers in the face of the rotor, if the slots are shallow and cut properly, the trade-off appears to be worth the risk. (Have you looked at a NASCAR rotor lately?) If you need to worry about brake pad degassing, then go with slotted rotors. Slotting is a much more superior way of preventing decreased brake performace due to brake pad degassing.
A little food for thought.
08-14-06, 02:45 PM
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thats dumb to say that they are just for looks because it is definitely a a performance upgrade and it no doubt helps with brake fading....i could tell a big differnce when i installed mine and cross drilled and slotted rotors have also been race proven
08-14-06, 02:55 PM
#16
i think tho that since we are going from from a worn out stock setup to new rotors and new pads and the whole brake job, we're comparing to how it feels now to how it use to feel with our old stock setup...
I think a good way to test is if someone had a new set of stock rotors/pads vs xdrill/slotted rotors/pads... must use same car and same pads btw.
I think a good way to test is if someone had a new set of stock rotors/pads vs xdrill/slotted rotors/pads... must use same car and same pads btw.
08-14-06, 04:02 PM
#17
Originally Posted by ahabion
i think tho that since we are going from from a worn out stock setup to new rotors and new pads and the whole brake job, we're comparing to how it feels now to how it use to feel with our old stock setup...
And for the rest of you. Show us proof that drilled/slotted are better? Instead of a butt dyno (which this forum tends to be utterly horrible).
08-14-06, 07:13 PM
#18
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Thanks for the backup guys. To all you who beleive that cross drilling brake rotors is a performance upgrade, just read around a little (not just posts like yours, read stuff like the Tire Rack article) and you'll see how wrong you are, or you can keep your little fantasies if it makes you happy.
I agree 100% that to make a real comparison you need to change nothing else. You may think that they helped with fade, but you probably got new pads, or at least bled the brakes.
Lots of high end cars use cross drilled rotors, but they're selling to rich guys who gingerly drive them to the country club to impress their freinds. Style is more important in selling a car than brake fade or potential rotor cracking, as more people will be interested in the looks, and few customers will even be aware of the issues around drilled rotors, and fewer still will use the brakes hard enough to cause the issues to come into play.
Drilled rotors are fine for the street, but they aren't a performance increase.
I agree 100% that to make a real comparison you need to change nothing else. You may think that they helped with fade, but you probably got new pads, or at least bled the brakes.
Lots of high end cars use cross drilled rotors, but they're selling to rich guys who gingerly drive them to the country club to impress their freinds. Style is more important in selling a car than brake fade or potential rotor cracking, as more people will be interested in the looks, and few customers will even be aware of the issues around drilled rotors, and fewer still will use the brakes hard enough to cause the issues to come into play.
Drilled rotors are fine for the street, but they aren't a performance increase.
08-15-06, 03:56 PM
#20
but those race cars have special pads and rotors just to last that race! in F1, they are special metals and cermerics. They only last one race, if that then they are done, and cost more then the fc is worth for just one rotor, and most other race leagues have something close(depending on rules). Now on the street you will never get to those temps that race brakes get to. Other than very very short times, which leads to temp extremes, which will lead to cracking at the weakest point, ie were they are drilled. But the slots can and is proven that they help with the outgasing of the pad/rotors, which can help stopping distance and fade resistance. So unless you have the budget of a F1 team, which i doubt, you are best to stick to slots or stock rotors, unless you wont the look of them, and be prepared to crack them when you hit a waterpuddle!
08-15-06, 05:28 PM
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Originally Posted by Black91n/a
Lots of high end cars use cross drilled rotors, but they're selling to rich guys who gingerly drive them to the country club to impress their freinds. Style is more important in selling a car than brake fade or potential rotor cracking, as more people will be interested in the looks, and few customers will even be aware of the issues around drilled rotors, and fewer still will use the brakes hard enough to cause the issues to come into play.
"...power assisted 4 wheel ventilated/cross drilled disc brakes..."
Are you telling me that the lotus elise...a popular track car and the lightest car on the US market...possibly the most performance oriented car you can buy under $100K...was built with style in mind over performance?
08-15-06, 05:52 PM
#22
ok.... first off.... when i put my rotors on, that was all i replaced..... no pads, no bleeding.... just the rotors.... so i DO know first hand, ive felt the differnece! i even drove the same roads, in the same driving conditions... so my "butt dyno, or my "fantasies" are all that matters to me! i could care less what people have written in articles! i might have backed up those stories before, but now that ive seen the difference first hand.. i cant do it!
and as for the whole mercades thing..... do you really think that they just put those rotors on for "looks" if you really think that, your retarded! thats one of the dumbest things ive ever heard! you really think that a 50 year old man gives a crap what his brake rotors look like! they do it because those cars are heavy boats, and they need every bit of extra brake cooling they can get! and i only used mercades as a reference.. personally, my rotors already proved themselves to me... so i dont need anything else!
now you can all say what you want.... but it seems that EVERYONE here who has ACTUALLY used these, swears by them! all you **** talkers are hear/sayers really have no place posting in a thread you have no PERSONAL experience w/! now if any of you have used these rotors ON A FC, then by all means, post away! but unless you have, your posts dont mean ****! your all going off of what other people have said!
and as for the whole mercades thing..... do you really think that they just put those rotors on for "looks" if you really think that, your retarded! thats one of the dumbest things ive ever heard! you really think that a 50 year old man gives a crap what his brake rotors look like! they do it because those cars are heavy boats, and they need every bit of extra brake cooling they can get! and i only used mercades as a reference.. personally, my rotors already proved themselves to me... so i dont need anything else!
now you can all say what you want.... but it seems that EVERYONE here who has ACTUALLY used these, swears by them! all you **** talkers are hear/sayers really have no place posting in a thread you have no PERSONAL experience w/! now if any of you have used these rotors ON A FC, then by all means, post away! but unless you have, your posts dont mean ****! your all going off of what other people have said!
08-15-06, 06:11 PM
#23
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Going from old rotors to new rotors even makes a difference. They're right when they say they're for looks. When all you guys tout racecars, and compare to them, yes, racecars use them for performance, becasue they are on their brakes really hard, a lot. Hence why they glow red. Guess what, your rx-7 isnt a racecar (no matter how much you want to pretend it is) and you aren't using the brakes even 10% as hard as the racecars are.
And for the super highend cars, yes they're mostly for looks and so the dealer can charge more. In the Lotus's case, its mostly for looks, but its also so you can put that car on a track without having to worry aobut anything.
Go ahead though, get your x-drilled rotors. I have nothing against them, really, just don't get too mad when they crack around the holes. And they will crack.
And for the super highend cars, yes they're mostly for looks and so the dealer can charge more. In the Lotus's case, its mostly for looks, but its also so you can put that car on a track without having to worry aobut anything.
Go ahead though, get your x-drilled rotors. I have nothing against them, really, just don't get too mad when they crack around the holes. And they will crack.
08-15-06, 08:04 PM
#24
I have a set of ebay sloted and drilled with plating on it... cant remember if its zink or nickle. but they dont rust and its been a year and a half and I live in indiana, I don't know about a performance advantage going with these but I do get a lot of comments on the disks and they seem to cool down prety fast after in park compared to the stockers
08-15-06, 08:08 PM
#25
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Calling people names is real good way of winning an argument, very mature Vipers. Does it make you feel like a big man to insult people? You can't argue with your head in the sand, if there's a wealth of evidence pointing to the fact that you're wrong, ignoring it doesn't make you any more right. Why don't you grow up.
Even performance cars have to look good, and people think that drilled rotors are a performance item, so they put them on. Even the all mighty Lotus compromises performance for style in places. It's not a race car, it's a street car remember. It makes the customer think they've got better brakes, and they think it looks good, so they put them on. Lots of cars have stuff purely for looks, like non-functional spoilers and the like. Mercedes are more about fashion than speed, so yes, they put them on to make the car look better, and they put on huge rotors and calipers to slow those boats down.
I've been to a bunch of races, both amateur and professional, and have wandered around the pits looking at stuff like brakes, and most race cars have solid or slotted discs. Hardly any use drilled rotors. Most high end motorsports use carbon/carbon brakes, which are completely different than steel or ceramic brakes, which are different from each other. NO carbon/carbon rotor I've ever seen has been anything but solid (they're vented, but not drilled/slotted). There's TONS of evidence to prove that drilled rotors crack sooner than non drilled ones. Slotted rotors are better, but they're still more prone to cracking than solid ones. Some race cars use drilled rotors, sure, but most race cars get their brake pads and rotors replaced very often, and they get inspected a lot, so cracks forming can be caught before they fail catastrophically. They're also using pads that are very aggressive, so the reduced surface area can be tolerated in some cases. JUST BECAUSE YOU SEE IT ON A RACE CAR DOESN'T MEAN IT'S GOT A PERFORMANCE ADVANTAGE!
New rotors can help by themselves, the old ones could have been seriously worn, meaning that they had less thermal capacity, or the old rotors could have been glazed over. Just because it happened once that something improved, doesn't make it universally true, and it doesn't mean they're better overall.
Any intelligent person with a good background in sciencewho takes the time to think about the science involved will come to the conclusion that drilled rotors will not help at all, they'll only hurt the performance of the car.
Drilled rotors are fine for the street, but they aren't a performance boost.
I've said my piece, if you all want to keep being ignorant fine, but keep your wrong information to yourselves from now on please.
Even performance cars have to look good, and people think that drilled rotors are a performance item, so they put them on. Even the all mighty Lotus compromises performance for style in places. It's not a race car, it's a street car remember. It makes the customer think they've got better brakes, and they think it looks good, so they put them on. Lots of cars have stuff purely for looks, like non-functional spoilers and the like. Mercedes are more about fashion than speed, so yes, they put them on to make the car look better, and they put on huge rotors and calipers to slow those boats down.
I've been to a bunch of races, both amateur and professional, and have wandered around the pits looking at stuff like brakes, and most race cars have solid or slotted discs. Hardly any use drilled rotors. Most high end motorsports use carbon/carbon brakes, which are completely different than steel or ceramic brakes, which are different from each other. NO carbon/carbon rotor I've ever seen has been anything but solid (they're vented, but not drilled/slotted). There's TONS of evidence to prove that drilled rotors crack sooner than non drilled ones. Slotted rotors are better, but they're still more prone to cracking than solid ones. Some race cars use drilled rotors, sure, but most race cars get their brake pads and rotors replaced very often, and they get inspected a lot, so cracks forming can be caught before they fail catastrophically. They're also using pads that are very aggressive, so the reduced surface area can be tolerated in some cases. JUST BECAUSE YOU SEE IT ON A RACE CAR DOESN'T MEAN IT'S GOT A PERFORMANCE ADVANTAGE!
New rotors can help by themselves, the old ones could have been seriously worn, meaning that they had less thermal capacity, or the old rotors could have been glazed over. Just because it happened once that something improved, doesn't make it universally true, and it doesn't mean they're better overall.
Any intelligent person with a good background in sciencewho takes the time to think about the science involved will come to the conclusion that drilled rotors will not help at all, they'll only hurt the performance of the car.
Drilled rotors are fine for the street, but they aren't a performance boost.
I've said my piece, if you all want to keep being ignorant fine, but keep your wrong information to yourselves from now on please.