Might go back to stock brakes after Centrics
01-24-18, 08:25 PM
#31
Lexus Fanatic
We understand this. The common understood term for this is “warped rotors” however.
01-24-18, 09:17 PM
#32
Racer
Thread Starter
Interesting as well, fb182. How did you find this out?
01-24-18, 09:20 PM
#33
Lexus Fanatic
Warping rotors has everything to do with how the rotors dissipate heat. Uneven hot spots on poor quality rotors promote high spotting of pad material, which is what warped rotors are.
Can it be ground away? Sure, that’s what turning, or resurfacing the rotors does. Issue is it thins the rotors, magnifies the issue with hot spotting and the warping comes back quicker.
Better quality rotors disspate heat better and spread heat more evenly, hence no warping.
Can it be ground away? Sure, that’s what turning, or resurfacing the rotors does. Issue is it thins the rotors, magnifies the issue with hot spotting and the warping comes back quicker.
Better quality rotors disspate heat better and spread heat more evenly, hence no warping.
01-24-18, 09:56 PM
#34
Racer
Thread Starter
Warping rotors has everything to do with how the rotors dissipate heat. Uneven hot spots on poor quality rotors promote high spotting of pad material, which is what warped rotors are.
Can it be ground away? Sure, that’s what turning, or resurfacing the rotors does. Issue is it thins the rotors, magnifies the issue with hot spotting and the warping comes back quicker.
Better quality rotors disspate heat better and spread heat more evenly, hence no warping.
Can it be ground away? Sure, that’s what turning, or resurfacing the rotors does. Issue is it thins the rotors, magnifies the issue with hot spotting and the warping comes back quicker.
Better quality rotors disspate heat better and spread heat more evenly, hence no warping.
01-25-18, 04:14 AM
#35
01-25-18, 04:21 AM
#36
I didn't know that - I always thought warped rotors meant that the metal had deformed somehow. Uneven pad deposits would explain why someone told me to try a few high-speed emergency stops to smooth out the rotors. It didn't make sense to me at the time, because I thought heavy braking would make it worse. My old car had 92k miles on the rotors, 70k on the pads, and there was a lot of vibration under heavier braking.
01-25-18, 05:01 AM
#37
Pole Position
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01-25-18, 10:31 AM
#38
Instructor
[QUOTE=FatherTo1;10092751]Interesting. I never even thought of it from this angle. Is it possible to mill away just the deposits or dissolve it away without pitting the rotors? If the issue is pad deposits then would it matter what brand of rotors are used? Will the deposits "warp" all rotors then?
Is it possible to mill away just the deposits or dissolve it away without pitting the rotors? Yes
If the issue is pad deposits then would it matter what brand of rotors are used? Will the deposits "warp" all rotors then?
It depends, the issue is the way the pad formulation reacts with the metal it contacts. So the question is "which part is the problem: oem pads or the oem rotors?". Someone can do the experimentation, and due to time constraints I chose to change the pads and rotors. Akebono has a great pad for the Euro market but I like Power Stop on the Japan cars. Try things and have a good time racking up the miles
Also, try the slots and try the drilled/you won't lose any distance...Let's have a little fun
Is it possible to mill away just the deposits or dissolve it away without pitting the rotors? Yes
If the issue is pad deposits then would it matter what brand of rotors are used? Will the deposits "warp" all rotors then?
It depends, the issue is the way the pad formulation reacts with the metal it contacts. So the question is "which part is the problem: oem pads or the oem rotors?". Someone can do the experimentation, and due to time constraints I chose to change the pads and rotors. Akebono has a great pad for the Euro market but I like Power Stop on the Japan cars. Try things and have a good time racking up the miles
Also, try the slots and try the drilled/you won't lose any distance...Let's have a little fun
Last edited by superdenso; 01-25-18 at 10:39 AM.
01-25-18, 11:50 AM
#39
Lexus Fanatic
Cross drilled and slotted rotors are just a look thing, they don't prover any actual benefit.
01-25-18, 12:33 PM
#40
As Mark further clarified, “Modern brake pads don’t have an issue with out-gassing like they did many years ago, but the cross-drilling is still helpful for use in wet conditions, especially when the pad surface area is large. Additionally, cross-drilling increases the surface area of the disc, and this aids in disc cooling (one factor in brake disc cooling is the ratio of surface area to disc mass). The most significant feature of the holes (when done correctly) is that they continually refresh the brake pad surface, providing improved performance and greater disc life. As the holes pass the brake pad they essentially clean the surface, helping to prevent pad glazing or hardening. This effect can be easily observed on a drilled disc near the outer edge where there are no holes. In this area, the pad surface is not refreshed and you will typically see greater disc wear in this unswept area.” It’s also worth noting that this type of pad refreshing by cross-drilled and/or slotted rotors helps maintain more consistent frictional performance.
Last edited by Lexuslsguy; 01-25-18 at 12:40 PM.
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superdenso (01-25-18)
01-25-18, 09:58 PM
#41
You guys are going to make my rotors warp lol. I was looking at the backs and can see a lot of material spread across the surface ad they look old. I hate when rotors get that look. I'm going to start my search now. The only issue I have with buying OEM is that they are usually more expensive than comparable offerings.
01-26-18, 12:33 AM
#42
Racer
Thread Starter
You guys are going to make my rotors warp lol. I was looking at the backs and can see a lot of material spread across the surface ad they look old. I hate when rotors get that look. I'm going to start my search now. The only issue I have with buying OEM is that they are usually more expensive than comparable offerings.
Last edited by FatherTo1; 01-26-18 at 06:59 AM.
01-26-18, 06:01 AM
#43
I plan on purchasing Centric rotors and pads in the next few weeks. I am going to have a shop do the installation, since I am mechanically challenged..... What should I expect to pay for labor to install rotors and pads (front and rear)? I am in Massachusetts and plan on calling a couple of repair shops that I have used in the past. I called the local Lexus dealer in Northborough, MA and they will not install non-OEM parts.
01-26-18, 06:58 AM
#44
Racer
Thread Starter
I plan on purchasing Centric rotors and pads in the next few weeks. I am going to have a shop do the installation, since I am mechanically challenged..... What should I expect to pay for labor to install rotors and pads (front and rear)? I am in Massachusetts and plan on calling a couple of repair shops that I have used in the past. I called the local Lexus dealer in Northborough, MA and they will not install non-OEM parts.
The following users liked this post:
mbarron37 (01-26-18)