Which drilled slotted rotors?

[luc]

With the advance in braking technology, the cross drilled rotor has Become obsolete from a performance perspective and has become a fashion statement

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[Martin Schacht]

Can't argue with Luc, he has 30 years at the track.

 

[EFI]

True but rotors are a replaceable item when tracking, the cracks are normally mild around the holes. Also these are the cars with race pads and r compound tires. A vast majority of people who track their BMWs and PCars don't have issues with the OEM drilled rotors. I know I was one of them, quite a few events at Willow and such and I never cracked my rotors. Although I did my runs on OEM Pirellis and just changed out the pads and fluid before and after each event.

Just because they are a wear item doesn't mean it's expected it to fail. It's one thing to replace a wear item because it's gone through its useful life and to replace a wear item because it failed.

Also if you're looking at OEM Porshe rotors I would assume there's a high quality of engineering and manufacturing there. You can't compare those to cheapo aftermarkert no name rotors.

 

[Martin Schacht]

ThigLife writes, "Just because they are a wear item doesn't mean it's expected it to fail. It's one thing to replace a wear item because it's gone through its useful life and to replace a wear item because it failed." Agree., I have never seen a failed brake rotor, that isn't an issue that I know of. Inter-hole linked cracks, that could make one feel uneasy.

He adds, "Also if you're looking at OEM Porsche rotors I would assume there's a high quality of engineering and manufacturing there. You can't compare those to cheapo aftermarkert no name rotors." SEBRO makes quality Porsche replacement rotors, about 2/3 the cost of OEM. Zimmerman makes rotors too, also cheaper than Factory, they may be the OEM supplier for Porsche, as rumor has it. Just buy the best rotors you can afford. $1,000 a set is pretty steep...

 

[Dave2013M3]

Just because they are a wear item doesn't mean it's expected it to fail. It's one thing to replace a wear item because it's gone through its useful life and to replace a wear item because it failed.

Also if you're looking at OEM Porshe rotors I would assume there's a high quality of engineering and manufacturing there. You can't compare those to cheapo aftermarkert no name rotors.

Stock rotors need replacing after extensive tracking...also since when is Baer Eradispeed cheap no name rotors. A complete set front and rear are over $1600. No where in my post do I advocate getting cheap no name rotors?

 

[Dave2013M3]

ThigLife writes, "Just because they are a wear item doesn't mean it's expected it to fail. It's one thing to replace a wear item because it's gone through its useful life and to replace a wear item because it failed." Agree., I have never seen a failed brake rotor, that isn't an issue that I know of. Inter-hole linked cracks, that could make one feel uneasy.

He adds, "Also if you're looking at OEM Porsche rotors I would assume there's a high quality of engineering and manufacturing there. You can't compare those to cheapo aftermarkert no name rotors." SEBRO makes quality Porsche replacement rotors, about 2/3 the cost of OEM. Zimmerman makes rotors too, also cheaper than Factory, they may be the OEM supplier for Porsche, as rumor has it. Just buy the best rotors you can afford. $1,000 a set is pretty steep...

Zimmerman makes the OEM rotors for BMW M cars, well they did up until the E92s. Don't know about now. What was funny they were identical to Genuine BWW but at almost at 1/3 more cost. They just didn't have the BMW logo on them.

 

[sigintel]

That reminds me, I need pads/rotors for 2018 X5M. They are monster but evidently challenged w extended backroads sessions...
i want a Ford version of X5M soooooo bad.
offered a Ford engineer my X5M as a test mule/benchmarking. Offered incoming Tesla truck as well....

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