newg37

and yes my rotor was warped on my old car. midas told me to change it and problem solved. lol why would they lie about that.

MSCA

iTrader: (3)

LOL... you went to Midas for brake work.

LOL... you believed whatever they told you.

LOL... and you wondered why they would lie to you.

Classic!

MSCA

iTrader: (3)

The guy says over and over how superior drilled rotors are and then goes on to explain that they dissipate heat better and gives us other advantages (he even uses cost as an advantage) as well.

Then he goes on to say that he doesn't use drilled/slotted rotors....but rather uses blank rotors that he cracks every 3 days and has to replace.

Sorry, but his posts make no sense. He's a cheerleader for drilled/slotted rotors, yet he doesn't use them himself, instead choosing to crack and replace his blank rotors every 3 days. That's the very definition of hypocritcal.

Mike

iTrader: (1)

The additional functionality of drilled and/or slotted rotors serve me, in my particular car, in my particular situation, no purpose on track. The rotors will crack regardless.

Again, reading comprehension failure on your part. I clearly stated that aftermarket slotted and/or drilled rotors are cheaper than OEM blanks. True. I also stated that my blanks are cheaper than drilled and slotted rotors. Also true. The blanks I use are not OEM. True yet again. As stated before, there is no advantage in me running drilled/slotted rotors, when they cost more, and offer me, in my situation, zero benefit.

I sincerely doubt there are more than a handful of posters here who regularly heat their brakes enough to make them glow like I do. I fully acknowledge the potential benefit of drilled/slotted rotors. Unfortunately, in my case, reaching equilibrium temperature 100 degrees lower doesn't do much, when your rotor temps are nearly 4 digits.

MSCA

iTrader: (3)

So you're saying that drilled rotors aren't good for you or your car, but everyone else will benefit from them. LOL, great, just great.

MSCA

iTrader: (3)

Oh, and BTW-- Rotors don't warp. It's all explained in the links posted earlier in this thread.

Mike

iTrader: (1)

Yes. "Everyone else" does not track their car.

Right. That's why they crack. Warping is caused by uneven heating/cooling, and cracks are caused by, you guessed it, uneven heating/cooling.

As I've stated before, if you track your car with any degree of proficiency, you would have run into brake issues at some point, and experienced these issues firsthand.

Mike

iTrader: (1)

Have you even seen a heat banding or scorching on a rotor?

Not my pictures, but you get the point.








I'll take some pics next time I'm at the track.

MSCA

iTrader: (3)

Thank you very much. We've now come full circle. Now you're agreeing with me, whether or not you realize it. LOL

joo030879

iTrader: (3)

"It gets worse. Cast iron is an alloy of iron and silicon in solution interspersed with particles of carbon. At elevated temperatures, inclusions of carbides begin to form in the matrix. In the case of the brake disk, any uneven deposits - standing proud of the disc surface - become hotter than the surrounding metal. Every time that the leading edge of one of the deposits rotates into contact with the pad, the local temperature increases. When this local temperature reaches around 1200 or 1300 degrees F. the cast iron under the deposit begins to transform into cementite (an iron carbide in which three atoms of iron combine with one atom of carbon). Cementite is very hard, very abrasive and is a poor heat sink. If severe use continues the system will enter a self-defeating spiral - the amount and depth of the cementite increases with increasing temperature and so does the brake roughness. Drat!" - Carroll Smith - StoTech

Key words: worse, spiral (warp, loophole),drat!, cementite = atom of carbon.

Cementite (warp, spiral) exists in molecular level. Very hard to take pictures of them with conventional camera. I believe in Caroll Smith from StopTech.

Neal376

iTrader: (1)

A 1999 Grand vitara I serviced had a completely inoperable front left wheel. upon further inspection we found that the disc rotor was so deformed that it was jammed up against the caliper bracket. With the rotor removed and placed on a flat surface, it was clear to the naked eye that the surface was severely distorted.

The car was driven by a young graduate student who did complain of various braking issues but was too busy to bring the car in.

resurfacing the rotor resolved the issues.

----------------
in the country I worked in, new rotors were prohibitively expensive and were not replaced until they were potato chips

Mike

iTrader: (1)

Are you saying that you agree with me that these slotted and/or drilled rotors are an all around win-win for virtually any car? A yes or no will suffice.

As usual, you simply choose to ignore all counterpoints and presented evidence. Please, stop spreading misinformation. Are you a mechanic by profession? By personal interest? Hobby?

Let me guess. You think wings are for track use only because they don't make any downforce at street speeds, right?

joo030879

iTrader: (3)

May I ask, where are you from? More if more interesting story please share with us. Thank you

MSCA

iTrader: (3)

Good. And here's a quote of his:

"In fact every case of "warped brake disc" that I have investigated, whether on a racing car or a street car, has turned out to be friction pad material transferred unevenly to the surface of the disc."

Glad to see you believe in him.

MSCA

iTrader: (3)

I'm saying that you agree with me. Read the thread again if you continue to fail in your understanding of the discussion.

You've given no evidence at all. The only thing you've given is your own opinion and a few pictures of cracked rotors. You've done nothing to disprove the authors of the links provided within. If anyone is spreading misinformation here, it's you.

All of the above. I worked as a professional tech for years after going to school for automotive technology. As much as I liked it, I wanted more out of life, so I got involved in automotive engineering, but decided to complete both a BS and MBA. Today, I'm in management at a blue chip company. I still wrench on cars all the time though... Thanks for taking an interest in my background.

Lets stick to the topic of brakes. No need to try and instigate more arguments. You're very transparent.