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Old 07-24-2010, 12:55 AM   #1
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Cross drilled rotors

So I've been looking for my next mod, and I would like to swap out my rotors for some cross drilled with stainless steel lines. So far I've really only been able to find Brembo's. I'm not against buying Brembo rotors, but I'm not a huge fan of the gold color.

So is anyone running different cross drilled rotors that they recommend? If so, where did you buy them?
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Old 07-24-2010, 02:44 AM   #2
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Stillen slotted\cross drilled here.
Hawk ceramics and SS lines.


In case you really wanna stop, like right freaking now
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Old 07-24-2010, 06:57 AM   #3
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Carbon fiber rotors for stopping right now!!!
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Old 07-24-2010, 10:31 AM   #4
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Stillen slotted\cross drilled here.
Hawk ceramics and SS lines.


In case you really wanna stop, like right freaking now
Nice... I completely forgot about Stillen! They use to mostly do import stuff I believe, but I know they make a quality product. Did you go with the slotted and cross drilled? Your setup is exactly what I think I want to go for. Did you go front and rear, or just front?
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Old 07-24-2010, 10:32 AM   #5
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Carbon fiber rotors for stopping right now!!!
Do you mean carbon ceramic? Those things are awesome... just a little too much for this guy to spend.
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Old 07-24-2010, 11:54 PM   #6
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I just put my Stillen rotors on today, slotted/cross drilled.
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Old 07-26-2010, 01:46 PM   #7
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Nice... I completely forgot about Stillen! They use to mostly do import stuff I believe, but I know they make a quality product.
A lot of people still think that. Stillen has been doing brake upgrades (among many other performance modifications) for GM vehicles since the early 90's.

http://www.motortrend.com/auto_news/...s/stillen.html

I could probably post images of the heavily modified Astro vans from back in the day, but I don't know if anyone just ate! Those were mostly shipped to Japan when the craze was in full swing.

The 5th Gen. is just the latest platform to receive some love. The Corvettes have been getting it since the C5 came out.

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Old 07-26-2010, 06:25 PM   #8
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I recently installed slotted rotors on my wifes TBSS. I paid a little extra to have them cryogenically treated as I have heard good things about this treatment. So far I'm happy. After proper pad wear in I have made a few hard stops and brakes feel good but I am also interested in rotor life which this treatment is supposed to help.
For pads I went with EBC as I run the on my Busa and love them.
I read on one of the threads JusticePete disagreed with running drilled or slotted rotors as this decreased the amount of rotor surface available for heat transfer and with newer pad technology drilled and/or slotted aren't necessary.

Last edited by busaboy; 07-27-2010 at 09:36 PM.
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Old 07-26-2010, 06:46 PM   #9
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I read on one of the threads JusticePete disagreed with running drilled or slotted rotors as this decreased the amount of rotor surface available for heat transfer and with newer pad technology drilled and/or slotted aren't necessary.
Slotted is good to allow any gas buildup a way to escape from between the pad and rotor. Drilled isn't the best if you do a lot of braking (like on a road course) as that removes mass (more mass is better for heat transfer/cooling).
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Old 07-26-2010, 06:49 PM   #10
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Originally Posted by busaboy View Post
I recently installed slotted rotors on my wifes TBSS. I paid a little extra to have them cryogenically treated as I have heard good things about this treatment. So far I'm happy. After proper pad wear in I have made a few hard stops and breaks feel good but I am also interested in rotor life which this treatment is supposed to help.
For pads I went with EBC as I run the on my Busa and love them.
I read on one of the threads JusticePete disagreed with running drilled or slotted rotors as this decreased the amount of rotor surface available for heat transfer and with newer pad technology drilled and/or slotted aren't necessary.
There is a lot of inaccurate information floating around regarding rotor metallurgy, heat/cryo treatment and machining techniques. Enough to write a paper. Actually, I'll be writing one pretty soon (as time permits!) and posting a link for anyone who needs a cure for insomnia.

Bottom line: Cross-drilling does provide extra pad bite, especially at higher speeds. The holes do provide some extra cooling, but only a little and only at higher temps. At lower temps, they actually help get the pad up to temperature by having less surface area in contact. Skilled drivers can tell the difference, while less experienced or less aggressive drivers may not be able to. Downside? A little more pad wear and a little more brake noise (groan, not squeal). And, they should not be used for heavy track use as they will crack sooner than non-drilled rotors will. Either way, buy only quality iron and life will be better.

Cryo? I've spoken to many metallurgists (and I'm a mechanical engineer) on this topic. Outside of those promoting the service, I haven't found one that believes cryo does a single thing to improve brake rotor performance or life. In fact, you can do microphotographs of material samples before and after and no difference can be found. They can't even tell if it has been done after you pay for it! I'm still open minded on the possibility as I know it works great for certain alloys with organized grain structures, but until I see concrete evidence it works on a random grain structure (like cast iron), I cannot recommend it in good conscience as an expenditure that promises a return.

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Old 07-26-2010, 07:58 PM   #11
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These look promising: http://brakeperformance.com/site/bra...FRkcswodWnyyjA
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Old 07-27-2010, 06:55 PM   #12
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I never said cryo was the answer it is a variable I am exploring. The extra cost was not that much and I have heard good things about it.
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Old 07-27-2010, 07:39 PM   #13
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Stillen

Great pkg deal also...
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Old 07-27-2010, 08:45 PM   #14
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Great pkg deal also...
Looks good! That's the exact setup I think I'm going to run. How much was the total cost (if you don't mind me asking)?
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Old 07-27-2010, 08:58 PM   #15
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How much for the whole set up with that Stillen package?
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Old 07-27-2010, 09:58 PM   #16
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If your looking for Rotors you should consider the DBA brand, a little Aussie engineered rotors for your Aussie engineered Camaro!
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Old 07-27-2010, 10:06 PM   #17
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definitely a future mod I would like to do.
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Old 07-31-2010, 07:49 AM   #18
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Quote:
Originally Posted by Spiffyguitar View Post
So I've been looking for my next mod, and I would like to swap out my rotors for some cross drilled with stainless steel lines. So far I've really only been able to find Brembo's. I'm not against buying Brembo rotors, but I'm not a huge fan of the gold color.

So is anyone running different cross drilled rotors that they recommend? If so, where did you buy them?
Why do you want to install cross drilled rotors?
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Old 07-31-2010, 09:46 AM   #19
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Quote:
Originally Posted by JusticePete View Post
Why do you want to install cross drilled rotors?
I'm guessing for cosmetics. I would want a set of drilled/slotted rotors!

What's the difference between 1-piece and 2-piece? Lighter and better cooling?
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Old 07-31-2010, 07:09 PM   #20
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Originally Posted by StlRomAniaN View Post
I'm guessing for cosmetics. I would want a set of drilled/slotted rotors!

What's the difference between 1-piece and 2-piece? Lighter and better cooling?
The primary benefit of a two piece is lighter weight so less rotating mass and improved braking. The slotted and cross drilled is a bit of a carry over from older pads that emitted gasses that reduced brake efficiency. Modern pad technology has eliminated that issue. The holes lighten the rotor and in theory improve cooling. Cross drilling can create a number of issues in cars that are driven hard on track. That is why I was asking what the the OP's goal was.
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Old 07-31-2010, 07:58 PM   #21
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Quote:
Originally Posted by JusticePete View Post
The primary benefit of a two piece is lighter weight so less rotating mass and improved braking. The slotted and cross drilled is a bit of a carry over from older pads that emitted gasses that reduced brake efficiency. Modern pad technology has eliminated that issue. The holes lighten the rotor and in theory improve cooling. Cross drilling can create a number of issues in cars that are driven hard on track. That is why I was asking what the the OP's goal was.
True, cross drilled rotors start to crack under hard driving conditions.
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Old 07-31-2010, 08:03 PM   #22
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agreed, but they do look cool!

Seriously though, the Slotted rotors are more durable than the drilled rotors, though the drilled may have cooling advantages over the slotted, i personally prefer durability over flash.
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Old 07-31-2010, 08:04 PM   #23
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Quote:
Originally Posted by JusticePete View Post
The primary benefit of a two piece is lighter weight so less rotating mass and improved braking. The slotted and cross drilled is a bit of a carry over from older pads that emitted gasses that reduced brake efficiency. Modern pad technology has eliminated that issue. The holes lighten the rotor and in theory improve cooling. Cross drilling can create a number of issues in cars that are driven hard on track. That is why I was asking what the the OP's goal was.
True, cross drilled rotors start to crack under hard driving conditions.
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Old 08-01-2010, 04:30 PM   #24
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True, cross drilled rotors start to crack under hard driving conditions.
Under hard track conditions, yes. For street driving (even fairly aggressive use) this is not a problem for good quality cross-drilled rotors.

If cracking is still a concern, wait until later this week when the new Stillen J-Hook rotors debut! They will have all the high-speed "bite" of cross-drilled rotors while negating concerns about cracking.

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Old 08-04-2010, 10:30 AM   #25
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In SSCA racing many classes prohibit the use of anything but an OE rotor. You'll see vette and Vipers tearing up the track with OE calipers, rotors and race compound pads. Cross drilled and slotted rotors are more of a fashion statement held over from the days when pads gassed so badly they reduced braking power. They do look really good.

If you car is going to see track duty, OE or plain faced rotors will do the job with a good race compound pad. I am a HUGE Cobalt Friction pad fan. I think they are the Gold Standard and all our Pedders track cars run on them. If you are never going to see the track slotted and cross drilled are fine. For the track my personal preference is plain face, but I certainly would not point and laugh at a slotted rotor for track use, but leave the cross drilled for the show circuit unless they are extremely high quality as you would find on a ZR1 or true exotic where the holes have been part of the original manufacturing process.
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