Ideas about these rotors?

[Toolfreak387]

Saw them on Ebay, I'm kinda skeptical.

http://cgi.ebay.com/ebaymotors/Magnum-Drill-Rotors-Protege-Speed-Turbo-MazdaSpeed-F-R_W0QQitemZ8036574476QQcategoryZ33564QQssPageNameZ WDVWQQrdZ1QQcmdZViewItem

[boostisgood]

I fave been thinking about these myself. Im just worried about getting bunk rotors. He has some decent feedback though.

[Toolfreak387]

yeah i read all the feedback. Its 80 cheaper than the Rotorworks rotors. I just dont want to be the guiena pig! (freak)

[jeremyfl]

I could have sworn that some people on here have these and said they are fine....I have seen them for a while too.

[UnNaturalinc]

If they have a known name and reputation... price is not really a factor (you get what you pay for is not always the case).

But don’t’ trust the stopping power of your car to some cheap Taiwan crap…. That’s for sure.

[Dave Mac]

If they have a known name and reputation... price is not really a factor (you get what you pay for is not always the case).

But don’t’ trust the stopping power of your car to some cheap Taiwan crap…. That’s for sure.
Hmmm... I wonder how many other parts in our cars are cheap Taiwan crap? My grandfather told me about that cheap "Jap-crap" that started to come over in the 60's and 70's; you know, Honda, Subaru, and Datsun.

Ready or not the Taiwanese/Chinese are here to stay (manufacturing anyway).

Dave Mac

[Toolfreak387]

I think prolly half of our car is made in taiwan. I looked in some threads about these rotors, no one gave any feedback.

[UnNaturalinc]

Hmmm... I wonder how many other parts in our cars are cheap Taiwan crap? My grandfather told me about that cheap "Jap-crap" that started to come over in the 60's and 70's; you know, Honda, Subaru, and Datsun.

Ready or not the Taiwanese/Chinese are here to stay (manufacturing anyway).

Dave Mac

Well not all of it is crap.... Obviously. Most everything we have here is made there. All your big name copanies (HKS, GReddy, A'PEXi) are mass produced in Asian-land factories anyway.

There's quality levels of everything and those are anywhere.

[quatelate]

I think prolly half of our car is made in taiwan. I looked in some threads about these rotors, no one gave any feedback.
if you look at the window sticker 95% of parts are from japan and final assembly point is hiroshima 50% 5% same thing

[Lt. Dan]

Uhm.... why? (and please don't say for performance)

Dan

[peepsalot]

Uhm.... why? (and please don't say for performance)

Dan
cause my rotors are warped

[Lt. Dan]

Then why not just get them turned, or replace them with some high quality blank rotors?

[peepsalot]

Then why not just get them turned, or replace them with some high quality blank rotors?
If these rotors work, then why not? What high quality blank rotors are you referring to? How do you judge quality, from the price tag?

[Lt. Dan]

*sigh* The main reason is because if you warp these rotors, you can't turn them.... And since you warped a stock set of rotors, I'm pretty sure you'll warp these too.... Hey, it's your money, I was just asking for a legit reason... Seems to me that the only reason to get these is for the "race" look.....

Dan

[peepsalot]

So you don't think cross drilling is beneficial at all? I was under the impression that it allows for heat to dissipate more quickly. Isn't too much heat buildup a factor in causing warped rotors? I don't know how the turning process works, but I wasn't aware that cross drilled rotors could not be turned.

[GhostLinker]

Drilled rotors will keep the rotors cooler but at the price of less surface for friction. Under hard/race conditions, they will perform better. Under extreme conditions, regular drilled rotors will maybe crack.

Slotted will not dissipate as much heat but will grip better than solid rotors.
In theory, the slotted ones will last longer.

Just one important note:
Braking is a combination of pads and rotor. You will have to match the rotors and pads the conditions in which they will be used and your type of driving.
Race pads will behave very well when hot. If they are used for regular driving, they will glaze and squeal. When cold, they will perform badly.

With drilled or slotted rotors, you should use a ceramic or carbon fiber pads for regular driving. If you car is used for racing or aggressive driving, you should use the Hawk race pads. Race pads will brake better but will eat your rotors, make noise and a lot of dust.

I know there are many vendors for pads and rotors but the key thing to remember:
If you buy a known brand, you will keep the rotors and pads for a predictable amount of time. If you buy these unknown brands, there is a change they will not last as long as expected. If the price is OK and you are willing to take the chance, then go ahead and buy them.

In my case, I will be a ginnea pig for the myrotor or trinet rotors and will use Hawk ceramic pads. I will post pics and update the forum with feedback. Worst case scenario, I will have to change the rotors within a year ... and I am Ok with that. If I make a mistake, I will probably fallback to Brembos.

[JDM Sam]

http://www.dallasimports.net/forums/index.php?showtopic=11487#

read that.

[Lt. Dan]

Thanks Sam... I've just gotten so burnt out with these arguments, that I didn't even bother trying to look up stuff to back me up.

Dan

[GhostLinker]

Thanks for the info. I did not complete reading the info but I will continue tonight. I am always ready to listen and learn.

Nevertheless, brakes are like oil ... there are many opinions and it is difficult to know what is right and what is wrong. Evilspeeder has an opinion and I respect his right to share it. I should have done this before, but I did some research on the net on the Brembo and Wilwood. They both manufacture rotors and they have testing facilities and race experience.

BREMBO says this about rotors:

"DRILLS AND SLOTS
Both drills and slots improve braking consistency, continuously cleaning and refreshing the pad surface. These slots or drilling provide a path to disperse built-up heat and gasses that result from pads acting on the rotors, as well as help to clean and refresh the pad surface. Both help in interrupting the water film in wet driving conditions, improving the brake response; this effect is more sensitive on cross-drilled discs owing to the different full/empty ratio of the surface and the possibility to have water flowing through theholes in the ventilation gap (on vented discs). On the other hand, where extreme friction level is required, the adoption of a highly aggressive pad such as in racing applications is necessary and slots are the right solution: being the slots not all through the disc thickness, the overall mechanical resistance of the disc is higher. Additionally, all of Brembo’s slotted discs are directional: the discs should be installed such that the end of the slot nearest the outer edge of the disc contacts the pad first."

from:
http://www.brembo.com/ENG/Performance/SportBrakes/QualityStandard1.htm


Willwood has a slightly different view:
"Wilwood vented rotors are designed for maximum cooling. The internal vanes pump cool air from the center of the wheel and take heat away from the rotor, allowing rotor temperatures to decrease. Wilwood has designed special curved vane and straight vane rotors to effectively move large volumes of air to rapidly disperse this heat (energy). Specially formulated iron is used to enhance the stability of the rotor, while allowing difficult castings in complex vane configurations to be produced. Wilwood’s proprietary casting techniques are the result of over 20 years of vented rotor research and development combined with actual on-track performance evaluation. All rotors are precision machined to assure surfaces are flat and parallel.
Wilwood specialty steel rotors are used when rapid thermal inputs occur and material stability is required (i.e. when a dragster must brake from 300 mph). Under such conditions specialty steels are used, often cross drilled to reduce rotational weight. Wilwood also manufactures dynamic mount rotors for Super Speedway applications as well as special limited duty street rod and pro series solid rotors."
from:
http://www.wilwood.com/Products/002-Rotors/index.asp

my 2 cents