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Old Nov 5, 2014 | 07:17 AM
  #76  
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Originally Posted by Spawne32
I'm well aware that performance ceramic rotors are completely different, that isnt what we are talking about. High carbon alloy rotors that are drilled for track use have been around for decades, brembo and wilwood have been selling kits for years specifically designed for that purpose.

Thats a floating rotor, much better cooling. Also please link some high quality ones available for the cobalt's brembos besides what John Powell offers with his floating rotor set up.
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Old Nov 5, 2014 | 09:32 AM
  #77  
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Originally Posted by ECaulk
Thats a floating rotor, much better cooling. Also please link some high quality ones available for the cobalt's brembos besides what John Powell offers with his floating rotor set up.
Only ones I know of are ZZP's and SSBC 2 piston 12.2" kit. Why does it have to be exclusively for the cobalt? The ones I posted are for a mustang, doesnt change the fact that they are what they are.
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Old Nov 5, 2014 | 10:30 AM
  #78  
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Originally Posted by Spawne32
Only ones I know of are ZZP's and SSBC 2 piston 12.2" kit. Why does it have to be exclusively for the cobalt? The ones I posted are for a mustang, doesnt change the fact that they are what they are.
Its a cobalt forum, and a discussion about cobalt brakes. zzps crack, wangspeed broke them
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Old Nov 5, 2014 | 10:37 AM
  #79  
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Originally Posted by Spawne32
Only ones I know of are ZZP's and SSBC 2 piston 12.2" kit. Why does it have to be exclusively for the cobalt? The ones I posted are for a mustang, doesnt change the fact that they are what they are.
I found some nice Carbon Ceramic brakes for the Mustang. 5,900 for just the Front.
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Old Nov 5, 2014 | 12:55 PM
  #80  
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Originally Posted by ECaulk
Also please link some high quality ones available for the cobalt's brembos besides what John Powell offers with his floating rotor set up.
That is the point. Nobody makes high quality rotors for the Cobalt, meaning that the stockers are about as good as it gets.

As for track abuse, I hit 130s and up to 140 at my local track on the straights. With upgraded power the most you can do to upgrade your brake system is pads and brake fluid. I run Prospeed 683 brake fluid and Hawk DTC-70 race pads at the track, with stock rotors. Rotors are cheaper to replace than pads; A set of front DTC-70's run 260 bucks. Like Spawne32 said, pay to play, count on spending a lot of money on brakes and tires if you seriously track any car.

And also: Hawk HPS are a serious downgrade from the stock Ferrodo pads. I have no experience with EBC pads.
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Old Nov 5, 2014 | 01:01 PM
  #81  
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Originally Posted by ECaulk
You need to get an EGT Adrian, to make sure you don't have high EGTs causing higher coolant temps and to protect watch your engine at the track. Although it might be worth having Trent install it (have to drop the turbo and drill the mani if you want a really good idea of the temp or we could just drop the elbow and drill that to get an idea of the temp changes) I'm sure Term would like to have this data also.

We can also do some air damn like John said off the control arm to try to help direct additional air that direction as long as your not tracking your car in the rain
Yeah the EGT sounds like a good idea. I've been researching brake cooling already and have found some DIY instructions using hoses routed from the front of the car to the brakes. Something to install for tracking only, obviously.
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Old Nov 5, 2014 | 01:37 PM
  #82  
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Originally Posted by ECaulk
Its a cobalt forum, and a discussion about cobalt brakes. zzps crack, wangspeed broke them
It doesnt surprise me that ZZP's crack, there is a post on here about their rotors not fitting their kit, they have MADE IN CHINA stamped right on them. However high performance rotors are definitely available for the cobalt. Rockauto sells no less then a dozen high performance rotors for the brembo equipped cars and even more for LSJ brakes. Stoptech/Centric and Powerstop all listed. DBA sells high performance rotors for the LSJ brakes as well. You go with cheap rotors, they are going to crack, regardless of being blanks, drilled, slotted, or drilled and slotted, and every rotor has its limits, how high those limits are depends on the rotor and the quality. To isolate drilled rotors as being terrible for everything is foolish, because they are just as high performance as slotted, and serve their own function.
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Old Nov 5, 2014 | 03:45 PM
  #83  
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Originally Posted by Spawne32
It doesnt surprise me that ZZP's crack, there is a post on here about their rotors not fitting their kit, they have MADE IN CHINA stamped right on them. However high performance rotors are definitely available for the cobalt. Rockauto sells no less then a dozen high performance rotors for the brembo equipped cars and even more for LSJ brakes. Stoptech/Centric and Powerstop all listed. DBA sells high performance rotors for the LSJ brakes as well. You go with cheap rotors, they are going to crack, regardless of being blanks, drilled, slotted, or drilled and slotted, and every rotor has its limits, how high those limits are depends on the rotor and the quality. To isolate drilled rotors as being terrible for everything is foolish, because they are just as high performance as slotted, and serve their own function.
I said **** ZZP a long time ago...

Who would give there money to a company who doesn't answer the phones. On a side note i'm glad to see everyone got off powells dick
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Old Nov 5, 2014 | 05:58 PM
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Originally Posted by 26gen4
I said **** ZZP a long time ago...

Who would give there money to a company who doesn't answer the phones. On a side note i'm glad to see everyone got off powells dick
This is the only forum Ive ever seen people ride ZZP so hard, most of the stuff I have purchased from them was because I was forced to because they are typically the only supplier of certain eco parts. I dont know a single person that has had a good experience with them, and most of the GM guys I know personally hate them.
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Old Nov 5, 2014 | 06:14 PM
  #85  
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Originally Posted by Spawne32
This is the only forum Ive ever seen people ride ZZP so hard, most of the stuff I have purchased from them was because I was forced to because they are typically the only supplier of certain eco parts. I dont know a single person that has had a good experience with them, and most of the GM guys I know personally hate them.
I'm the same. I had to buy a couple things only because they were the only ones that sold it. I've had terrible customer service from them.
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Old Nov 5, 2014 | 06:24 PM
  #86  
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Stock pads and rotors on mine are completely fine. Seen multiple pulls and track time and heavy abuse. After 35k miles of the original ones I said eff it why not put the original ones back on. Work amazing. IMHO.
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Old Nov 5, 2014 | 08:04 PM
  #87  
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Not sure where all the lack of respect in this thread comes from. Gets tiresome.
Spawne32 to validate my point of view, I have spent most of my life at the race track. I have done extensive brake development work for GM particularly on Corvette over a twenty year period. I have seen many broken and cracked drilled rotors and unhappy customers . I have seen broken and cracked blank and slotted rotors but way less. Hardly any. Heat checked? for sure. Especially when folks over brake their cars on the track.

So. That out of the way, what will work? The first thing is, as I have done the track to street and racing carryover to street more than most folks here are some things that are best for braking in racing, that are not always going to work on the street.

brake cooling ducts. hoses get ripped off and replaced . In a 24 hour race complete brake hub caliper cooling assemblies are replaced in a pit stop these days. Not practical for the street. Brake ducsts are bad for winter snow build up and trash etc. Decent red silicone 3 inch brake duct hose is 12 bux a foot.

Floating rotors. I love them. the Coleman rotors I use are brilliant. Very good material and well machined in Menommee, Michigan . The hardware I have used , like the PFC bridge stuff , well, not so much. In racing the rotor assemblies and the bobbin hardware get replaced every sprint race or in pitstops in enduro racing. On the street, the brake dust and corrosion even in summer causes the bobbins to seize , and the rotors dont float properly and the brake pulsation is horrible. After a very short use time. There are 24 bolts nuts and washers on each of my PFC bobbins per rotor and it takes about three hours to remove, strip, clean and reassemble the rotors and replace on the car. I may go to the simpler Brembo style bobbins but they get replaced often and they cost 125 a set. Is this practical for the street?

Blank rotors. The really good Brembo rotors for Cobalt dont have curved vanes or even really decent sized vanes but the material is very good. That said, the pad to disc deposition is an issue. I slot my Brembo rotors; the rotors last longer and the wet weather performance is better, with more immediate brake apply. I did straight slots like we do in racing. They are noisy as heck on a quiet car; I hear it on my SAAB, on my Redline i just hear the exhaust on my Redline. I machined curved slots and fixed the noise. Interesting. IN racing no one cares about brake noise.

Brake Pads. Pagid ceramic race pads are my favorite; Andreas Boehm the German Pagid brake engineer in USA is super responsive, always at the track and good with advice. I dont actively race in USA anymore, but Andreas always has time to answer my email questions and I use his stuff on Corvettes and the like for the customer track cars. $1200 a set for the RS 19 pads for the Brembo 6 piston calipers. PAGID dont do pads for the Cobalt for sale. What they made for our team they made for us.

The Ferodo HP1000 LNF pad is a very good pad, and the stock LSJ pad is very good as well for the track and street. For more track oriented stuff you need a better ceramic material. I use HP1000 for street and track and I use el cheapo Bendix Metal masters for the winter. 40 dollars a set on amazon some days, works awesome at minus 30 degrees, where HP 1000 do not.

But back on topic to rotors. Most folks dont know that the material is what makes the rotor good, and you cant buy good cheaply.

I suggest folks down load and read this. Its current and its correct and its from the SAE, Good stuff
http://www.sae.org/events/bce/tutorial-ihm.pdf

So once you know you need at least G4000 grey iron rotors can you order them by material? I doubt it. So you are back to relying on what most folks have found on here for street and track work: For the LSJ bone stock OEM rotors are best. For the LNF bone stock Brembo rotors are the best.

thats all I got for now.

Last edited by Powell Race Parts; Nov 5, 2014 at 08:09 PM.
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Old Nov 5, 2014 | 09:45 PM
  #88  
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Originally Posted by Spawne32
It doesnt surprise me that ZZP's crack, there is a post on here about their rotors not fitting their kit, they have MADE IN CHINA stamped right on them. However high performance rotors are definitely available for the cobalt. Rockauto sells no less then a dozen high performance rotors for the brembo equipped cars and even more for LSJ brakes. Stoptech/Centric and Powerstop all listed. DBA sells high performance rotors for the LSJ brakes as well. You go with cheap rotors, they are going to crack, regardless of being blanks, drilled, slotted, or drilled and slotted, and every rotor has its limits, how high those limits are depends on the rotor and the quality. To isolate drilled rotors as being terrible for everything is foolish, because they are just as high performance as slotted, and serve their own function.
ya those were mine, they sent the 3800 rotors instead of the cobalt ones, owell **** happens

and ya the rotors are made in china which is to be expected in a $600 brake kit, can easily buy different rotors and have them redrilled. ill be swapping out the rotors before i do any road courses
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Old Nov 6, 2014 | 06:12 AM
  #89  
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Originally Posted by Powell Race Parts
Not sure where all the lack of respect in this thread comes from. Gets tiresome.
Spawne32 to validate my point of view, I have spent most of my life at the race track. I have done extensive brake development work for GM particularly on Corvette over a twenty year period. I have seen many broken and cracked drilled rotors and unhappy customers . I have seen broken and cracked blank and slotted rotors but way less. Hardly any. Heat checked? for sure. Especially when folks over brake their cars on the track.

So. That out of the way, what will work? The first thing is, as I have done the track to street and racing carryover to street more than most folks here are some things that are best for braking in racing, that are not always going to work on the street.

brake cooling ducts. hoses get ripped off and replaced . In a 24 hour race complete brake hub caliper cooling assemblies are replaced in a pit stop these days. Not practical for the street. Brake ducsts are bad for winter snow build up and trash etc. Decent red silicone 3 inch brake duct hose is 12 bux a foot.

Floating rotors. I love them. the Coleman rotors I use are brilliant. Very good material and well machined in Menommee, Michigan . The hardware I have used , like the PFC bridge stuff , well, not so much. In racing the rotor assemblies and the bobbin hardware get replaced every sprint race or in pitstops in enduro racing. On the street, the brake dust and corrosion even in summer causes the bobbins to seize , and the rotors dont float properly and the brake pulsation is horrible. After a very short use time. There are 24 bolts nuts and washers on each of my PFC bobbins per rotor and it takes about three hours to remove, strip, clean and reassemble the rotors and replace on the car. I may go to the simpler Brembo style bobbins but they get replaced often and they cost 125 a set. Is this practical for the street?

Blank rotors. The really good Brembo rotors for Cobalt dont have curved vanes or even really decent sized vanes but the material is very good. That said, the pad to disc deposition is an issue. I slot my Brembo rotors; the rotors last longer and the wet weather performance is better, with more immediate brake apply. I did straight slots like we do in racing. They are noisy as heck on a quiet car; I hear it on my SAAB, on my Redline i just hear the exhaust on my Redline. I machined curved slots and fixed the noise. Interesting. IN racing no one cares about brake noise.

Brake Pads. Pagid ceramic race pads are my favorite; Andreas Boehm the German Pagid brake engineer in USA is super responsive, always at the track and good with advice. I dont actively race in USA anymore, but Andreas always has time to answer my email questions and I use his stuff on Corvettes and the like for the customer track cars. $1200 a set for the RS 19 pads for the Brembo 6 piston calipers. PAGID dont do pads for the Cobalt for sale. What they made for our team they made for us.

The Ferodo HP1000 LNF pad is a very good pad, and the stock LSJ pad is very good as well for the track and street. For more track oriented stuff you need a better ceramic material. I use HP1000 for street and track and I use el cheapo Bendix Metal masters for the winter. 40 dollars a set on amazon some days, works awesome at minus 30 degrees, where HP 1000 do not.

But back on topic to rotors. Most folks dont know that the material is what makes the rotor good, and you cant buy good cheaply.

I suggest folks down load and read this. Its current and its correct and its from the SAE, Good stuff
http://www.sae.org/events/bce/tutorial-ihm.pdf

So once you know you need at least G4000 grey iron rotors can you order them by material? I doubt it. So you are back to relying on what most folks have found on here for street and track work: For the LSJ bone stock OEM rotors are best. For the LNF bone stock Brembo rotors are the best.

thats all I got for now.
awesome post! Hit the nail on the head. I'd like to address the comment about the lack of respect on this forum for a sec. You see a total and belligerent lack of respect on this forum because this is a cheap car. Cheap cars attract cheap people and cheap people usually have a douche bag outlook. Not saying all owners are cheap or douches. Just majority. Like the civic crowd. People get but hurt when someone tells them like it is and the disrespect soon follows. It's like an STD here. Just spreads and spreads. Things need to change but I don't see it happening. As for the rotors.. John has it all down correct. And nobody is using high grade iron on the cobalt because it's a waste of money. A huge waste. If the car was 5k more at purchase price I bet over half the owners here would have bought a civic or Kia forte instead. Grotesque. I can't believe the hate in here.
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Old Nov 6, 2014 | 03:19 PM
  #90  
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Originally Posted by Powell Race Parts
Not sure where all the lack of respect in this thread comes from. Gets tiresome.
Spawne32 to validate my point of view, I have spent most of my life at the race track. I have done extensive brake development work for GM particularly on Corvette over a twenty year period. I have seen many broken and cracked drilled rotors and unhappy customers . I have seen broken and cracked blank and slotted rotors but way less. Hardly any. Heat checked? for sure. Especially when folks over brake their cars on the track.

So. That out of the way, what will work? The first thing is, as I have done the track to street and racing carryover to street more than most folks here are some things that are best for braking in racing, that are not always going to work on the street.

brake cooling ducts. hoses get ripped off and replaced . In a 24 hour race complete brake hub caliper cooling assemblies are replaced in a pit stop these days. Not practical for the street. Brake ducsts are bad for winter snow build up and trash etc. Decent red silicone 3 inch brake duct hose is 12 bux a foot.

Floating rotors. I love them. the Coleman rotors I use are brilliant. Very good material and well machined in Menommee, Michigan . The hardware I have used , like the PFC bridge stuff , well, not so much. In racing the rotor assemblies and the bobbin hardware get replaced every sprint race or in pitstops in enduro racing. On the street, the brake dust and corrosion even in summer causes the bobbins to seize , and the rotors dont float properly and the brake pulsation is horrible. After a very short use time. There are 24 bolts nuts and washers on each of my PFC bobbins per rotor and it takes about three hours to remove, strip, clean and reassemble the rotors and replace on the car. I may go to the simpler Brembo style bobbins but they get replaced often and they cost 125 a set. Is this practical for the street?

Blank rotors. The really good Brembo rotors for Cobalt dont have curved vanes or even really decent sized vanes but the material is very good. That said, the pad to disc deposition is an issue. I slot my Brembo rotors; the rotors last longer and the wet weather performance is better, with more immediate brake apply. I did straight slots like we do in racing. They are noisy as heck on a quiet car; I hear it on my SAAB, on my Redline i just hear the exhaust on my Redline. I machined curved slots and fixed the noise. Interesting. IN racing no one cares about brake noise.

Brake Pads. Pagid ceramic race pads are my favorite; Andreas Boehm the German Pagid brake engineer in USA is super responsive, always at the track and good with advice. I dont actively race in USA anymore, but Andreas always has time to answer my email questions and I use his stuff on Corvettes and the like for the customer track cars. $1200 a set for the RS 19 pads for the Brembo 6 piston calipers. PAGID dont do pads for the Cobalt for sale. What they made for our team they made for us.

The Ferodo HP1000 LNF pad is a very good pad, and the stock LSJ pad is very good as well for the track and street. For more track oriented stuff you need a better ceramic material. I use HP1000 for street and track and I use el cheapo Bendix Metal masters for the winter. 40 dollars a set on amazon some days, works awesome at minus 30 degrees, where HP 1000 do not.

But back on topic to rotors. Most folks dont know that the material is what makes the rotor good, and you cant buy good cheaply.

I suggest folks down load and read this. Its current and its correct and its from the SAE, Good stuff
http://www.sae.org/events/bce/tutorial-ihm.pdf

So once you know you need at least G4000 grey iron rotors can you order them by material? I doubt it. So you are back to relying on what most folks have found on here for street and track work: For the LSJ bone stock OEM rotors are best. For the LNF bone stock Brembo rotors are the best.

thats all I got for now.
I know who you are, you have a reputation on and off the forum for your years of track experience so I know what you say is legitimate. But like you say, they all crack, especially on car's that are overbraked or under equipped. Cracks find their way through the path of least resistance, and drilled rotors offer that much easier then slotted do, but it doesn't mean that drilled dont have their purpose on and off the track.

As you said in the second part, brake rotor metallurgy is key to all of this. Cheap cast rotors are going to crack much easier then a higher quality counterpart. Regardless of its design.
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Old Jan 19, 2015 | 07:04 PM
  #91  
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Update:

Yesterday, at the road track, my other R1Concepts rotor died on me. I don't think it is a coincidence that this has happened to both front R1C rotors now and my two front stock rotors don't even show any sign of hair cracks in them. So I rest my case. R1C's look great, but under that nice machined surface and those nice powder coated edges hides a very cheap Chinese made piece of metal that is just a very poor quality. It may work fine for most that drive their car on the street, but it is not fit for competitive driving on a road course.

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