[Zach.K]

Warped rotors are a myth. Plain and simple.
It's just pads that where not properly bedded.

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[Zach.K]

Yes all the time. Unless you have a track truck.

Nope

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[Zach.K]

Hey who is the engineer you're quoting? I can only find it as some Max at 3si.org (3000gt forum). Would be nice to finish that read.

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[Zach.K]

If you go up a page from extreme import, it states that write up was taken from 3si.org. so the extreme link is not where it originated. I'm curious to see where that write up came from.

-This is something important that everyone should know and understand.
It is a post made by a very knowledgeable user on 3si.org about
cross-drilled rotors
Cross-Drilled Rotors Myth

Knowledgeable user does not necessarily equal engineer.
Now I appreciate this write up but so far it is just a well written piece with little documentation. I can appreciate you have a friend who works in the field but I find opinions on brakes vary to greatly to be satisfied by one well written article that has only circulated the net with no substantiation.

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[Zach.K]

With lack of substantiation though. You're just telling me a buddy of yours(unnamed, no credentials) states this to be fact. Sorry but however a great read it's nothing more then that without documentation.

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[Zach.K]

Great read GN, thanks for that. **** had me smiling and highlighting the whole time until the bottom of page 24 where he states NO GOOD for Daily driver. .... **** lol.

However I would like to add the following table from his summary that supports Slotted rotors.

However I am not convinced a truly attentive driver such as some of us, would be in a higher risk category due to the fact that we pay attention to our vehicles we look for things that are wrong and out of place. Cracked rotors to myself and others would stand out.

His biggest reason for them being bad for daily or spirited driving is due to lack of inspection and attention to the rotors. He also notes no added benefits in daily driving seeing as we won't see the braking situations like racing.(Not your once a month track day) but in most of the studies he provided braking was better, cooling was better and performance was better on the cross drilled and slotted rotors.

Also of note is as rotor technology goes away from Iron and towards carbon ceramics and other materials the worry of rotors cracking and failing due to the drilled and slotted will be gone.

So I take away from this, if you are going to run Drilled and Slotted, inspect your rotors if you do any serious heavy braking, such as coming down a mountain driving like, well I do.

Thank you again GN for posting that. I advise all to really read that investigation.

Zach

 

[Zach.K]

If the slots are not machined correctly or if the rotor material is ****, you're going to have problems.

This is assuming that there is no QC\QA. I have a little faith in the better brands out there, like stoptech, Adams Rotors, and EBC, Hawks etch... to market quality parts.

What your state above can and does apply to even regular blank rotors, pads, plugs etc...
You just cannot bias your rotors due to that if your dont bias everything else you buy.

Those are actually pretty fair prices you listed.

I bring with me to Cruzetalk a Motto from the Audi forum I am on.

""""Buy Nice or Buy Twice"

keep that in mind on any purchase.

 

[Zach.K]

Well put Danny

 

[Zach.K]

So you're going to pay a lot more for looks - might as well add a fart can and stickers to your car. Good luck with drilled rotors and I hope they don't crack for you when you need them most.

And derail it back to trash talk. This discussion was actually going pretty good too.
Nice

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[Zach.K]

That mountain must not have been like the two my Wife goes over every day to work, and back home. I've had both of our Cruze's shaking badly going down either side. This is with both stock brakes, and EBC blank rotors with Hawk HPS pads that were bedded to the letter of Hawk's instructions.

I start at roughly 30-40 mph at the top, and by the bottom you have to use the brakes a lot because these cars just will not hold themselves back. When you get behind someone it's even worse. You can let them get ahead of you at the top, but by the middle to bottom of the mountain you have to be all over the brakes because they're poking along at 25, and the Cruze acts like a run away train because there's no compression braking.

For me personally I see no con's to the slotted rotors. I've had them before with no problems as far as brake shake compared to blank rotors. Now if I lived out where it's flat I definitely believe that blank rotors would suit me just fine.



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So as far as the shaking goes with the pad deposits, did you Rebed afterwards to remove the deposits?

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[Zach.K]

No sir, was not aware that doing that would fix anything? Too late now to try it again?

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That's what I have always experienced is that bedding the rotors after a trip like that gets deposit build up gets you a *clean* rotor. Basically removes the built up pad deposit and smooths it back out.

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[Zach.K]

So after all is said so far... is there any reason cross drilled/slotted would be a problem on a daily highway driver? Not concerned with cracking a rotor as they'll NEVER see that kind of trauma in the first place. Mostly concerned with stopping distance. I could also careless about pad replacements. Those are cheap and easy to do. Can someone answer this question directly without a loaded answer?

No problem, you just will not see the benefit. So if your comparing cost vs functionality then it's not worth it if you want them for looks and don't mind the extra cost ( I assume you won't buy ebay cheapos) then go for it

Delivered from my pigeon