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Old 04-08-2013, 05:05 PM   #1
Big C CamaroSS

 
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DBA Two Piece 5000 series rotors

I know the Racing Brake two piece rotors are top 3 when it comes to Camaro rotors, but the DBA two piece 5000 series rotors are up there too, right? And for the rear.....the 4000 series 6x6 (slotted) rotors to match the front. Both have the "black hat" hub. I've read many, many good reviews on DBA rotors, but it would be nice to hear first hand experiences. Would I benefit from weight saving from both front & rear rotors? Thanks.

I'm looking at ordering from Maryland Speed....I hope they still have the rear rotors in stock
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Old 04-08-2013, 06:06 PM   #2
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Quote:
Originally Posted by Big C CamaroSS View Post
I know the Racing Brake two piece rotors are top 3 when it comes to Camaro rotors, but the DBA two piece 5000 series rotors are up there too, right? And for the rear.....the 4000 series 6x6 (slotted) rotors to match the front. Both have the "black hat" hub. I've read many, many good reviews on DBA rotors, but it would be nice to hear first hand experiences. Would I benefit from weight saving from both front & rear rotors? Thanks.

I'm looking at ordering from Maryland Speed....I hope they still have the rear rotors in stock
I'm not sure about the 5000 series, but the 4000 series actually weigh a little more than stock when I put them on my 2010. They work good, but unless the 5000 series weighs less, not sure I would get them over the Racing Brake rotors.
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Old 04-08-2013, 06:45 PM   #3
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Originally Posted by So Cal Camaro View Post
I'm not sure about the 5000 series, but the 4000 series actually weigh a little more than stock when I put them on my 2010. They work good, but unless the 5000 series weighs less, not sure I would get them over the Racing Brake rotors.
This is why Racing Brake rotors are so popular. They are stupid light compared to the OEM rotors.
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Old 04-09-2013, 12:14 PM   #4
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This is why Racing Brake rotors are so popular. They are stupid light compared to the OEM rotors.
Well for $2100 they should be !!

Thanks for the heads up on the rotor weights So Cal Camaro....I would be more likely to put the money towards new rims than rotors. Rotors will be a Christmas present this year
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Old 04-09-2013, 04:12 PM   #5
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Well for $2100 they should be !!

Thanks for the heads up on the rotor weights So Cal Camaro....I would be more likely to put the money towards new rims than rotors. Rotors will be a Christmas present this year
Reason they are worth the money to me (which btw they are only $1,850 from Apex Speed) is because they weight savings is 100% unsprung weight. Whereas any weight savings in wheels is split between rotational weight and unsprung weight.
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Old 04-09-2013, 05:32 PM   #6
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the dba's are a good choice if you are just interested in how they look.

if you want performance and looks there is a reason racing brake costs what they do. they are pretty and have pretty significant weight loss in a very crucial area as stieger described.

goodluck with what you choose.
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Old 04-10-2013, 02:35 AM   #7
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The DBA 5000s weigh a few pounds less than stock. I know on Docs build thread he put them on a scale to compare to stock. As far as function I had 5000s front and 4000s rear. Never had brake issues on any track or in the canyons. I did change to CTS-V 6 piston fronts and keeping the 4000s out back.
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Old 04-10-2013, 05:07 AM   #8
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Thanks everyone. I was up cleaning the gutters yesterday and we really need to move forward with a new roof this year so new rotors (Racing Brake maybe???) will need to be an over-the-winter buy. If I spend money on my camaro, it will be for new rims and tires.
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Old 06-04-2013, 09:53 PM   #9
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Quote:
Originally Posted by Inferno LS3 View Post
The DBA 5000s weigh a few pounds less than stock. I know on Docs build thread he put them on a scale to compare to stock. As far as function I had 5000s front and 4000s rear. Never had brake issues on any track or in the canyons. I did change to CTS-V 6 piston fronts and keeping the 4000s out back.
Are you still happy with your 5000's in the front and 4000's in the rear? Seems the 5000's would be about $800 for fronts and the 4000's would be about $500. Know any good places to purchase? I may go this route as well. Not sure I wanna shell out for the RB :/ I do want the RB's really bad though
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Old 06-05-2013, 01:01 AM   #10
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Are you still happy with your 5000's in the front and 4000's in the rear? Seems the 5000's would be about $800 for fronts and the 4000's would be about $500. Know any good places to purchase? I may go this route as well. Not sure I wanna shell out for the RB :/ I do want the RB's really bad though
I was happy with them when I had them. Did plenty of events as road course in Phoenix and lots of autoX events.
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Old 06-05-2013, 03:07 AM   #11
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The DBA 5000s weigh a few pounds less than stock. I know on Docs build thread he put them on a scale to compare to stock. As far as function I had 5000s front and 4000s rear. Never had brake issues on any track or in the canyons. I did change to CTS-V 6 piston fronts and keeping the 4000s out back.
wierd cuz Doc runs RB.
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Old 06-05-2013, 05:54 AM   #12
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wierd cuz Doc runs RB.
This
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Old 06-05-2013, 06:14 AM   #13
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Reason they are worth the money to me (which btw they are only $1,850 from Apex Speed) is because they weight savings is 100% unsprung weight. Whereas any weight savings in wheels is split between rotational weight and unsprung weight.
Quote:
Originally Posted by SPCBA View Post
the dba's are a good choice if you are just interested in how they look.

if you want performance and looks there is a reason racing brake costs what they do. they are pretty and have pretty significant weight loss in a very crucial area as stieger described.

goodluck with what you choose.
Both very good posts. Also keep in mind that RacingBrake also excels is heat dissipation. This is another area where other brands just do not compare. Like SPCBA said, not everyone needs that much rotor though.
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Old 06-05-2013, 06:20 AM   #14
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Both very good posts. Also keep in mind that RacingBrake also excels is heat dissipation. This is another area where other brands just do not compare. Like SPCBA said, not everyone needs that much rotor though.
True, for a non-track car RB is a bit of over kill.
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Old 06-05-2013, 07:18 AM   #15
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Reason they are worth the money to me (which btw they are only $1,850 from Apex Speed) is because they weight savings is 100% unsprung weight. Whereas any weight savings in wheels is split between rotational weight and unsprung weight.
I would have to disagree with you that the rotor does not also have a rotational weight impact. Even though it is a smaller diameter than the wheel itself it still has a rotational inertia that needs to be stopped. Afterall the brake rotor is rotating at the same RPM as the wheel. Just the rotors weight is more concentrated towards the center of the wheel so it's rotational inertia is a little easier to overcome (has less leverage) but it's still a rotational intertia that needs to be stopped by the brake pads.

This can be viewed as the same principle as a heavier flywheel vs a lighter flywheel on the engine. The heavier the flywheel the more rotational inertia it carries.
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Old 06-05-2013, 07:49 AM   #16
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I would have to disagree with you that the rotor does not also have a rotational weight impact. Even though it is a smaller diameter than the wheel itself it still has a rotational inertia that needs to be stopped. Afterall the brake rotor is rotating at the same RPM as the wheel. Just the rotors weight is more concentrated towards the center of the wheel so it's rotational inertia is a little easier to overcome (has less leverage) but it's still a rotational intertia that needs to be stopped by the brake pads.

This can be viewed as the same principle as a heavier flywheel vs a lighter flywheel on the engine. The heavier the flywheel the more rotational inertia it carries.
No you're absolutely right. Rotors are a combination of rotational and unsprung weight.
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Old 06-05-2013, 11:22 AM   #17
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The nice thing about RB's rotors is they genuinely improve things in 5 different areas as opposed to other rotors which may only improve things in one area at best.

Many rotor upgrades honestly only improve appearance, which for those who buy them is usually the main reason they bought them. They like the drilled and slotted look because they think that makes them look "cool" and "high performance" and that they'll run cooler as a result. The looks are nice but there's an issue with simply drilling holes in a cast, solid rotor, and that's rotational balance. Unless you're using an engineering program that's controlling a computer-controlled drilling setup that's PRECISELY drilling the holes at EXACTLY the right locations around the disc, you're almost guaranteed to throw off the overall spinning balance of the rotor.

Having an out-of-balance rotor does the same thing an out-of-balance wheel/tire does; it causes vibrations, stresses the bearings and can reduce performance as a result. Because the rotor is smaller it may not be so immediately obvious the way an out-of-balance wheel is but the effects are the same.

What's great about RB's rotors (and one of the reasons why they're worth the money) is the slotted/drilled rotors are factory balanced before they're shipped. That's not something most people think about with brake rotors but it's worth knowing and having.

In addition to being a superior brake rotor, RB rotors reduce unsprung rotational weight which improves acceleration, deceleration, cornering and suspension response (all of which has nothing to do with braking), and for actual braking, after hot laps on the track they'll run about 150į cooler than competing rotors which is a significant advantage in avoiding brake fade. And for those who are concerned about looks, they look seriously "cool"; just take an RB rotor out of the shipping box and you'll instantly see why they cost what they do. They make the stock factory rotors look like crude junk by comparison.

It's like losing weight; yes you look better but you're also healthier, feel better and can move faster. It's worth it to save up for RB rotors because they improve things in other areas besides just brakes. No I don't work for them; just a fan of quality products.

And since people have graciously referred to it, here's a link to my project thread which has more info and shows why I convinced Warren and RB to make these rotors available for our Camaros in the first place:

http://www.camaro5.com/forums/showthread.php?t=45165

I was familiar with RB's rotors through Mazda racing (I had a Mazda RX8) and I knew these would be great for the Camaro, and they are.
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Old 06-05-2013, 12:08 PM   #18
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I have DBA 5000 front 4000 rear and have no complaints.

The first year I had the car I warped the factory rotors. Then I added some very affordable, cool looking rotors that I warped in about six months. RBs were not in my price range for a daily driver and I got a good deal on the DBAs from Maryland Speed. They have been on the car now for well over a year with no issue.

I donít race, but Iím not a hypermiler either!!

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Old 06-06-2013, 12:32 AM   #19
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I have DBA 5000 front 4000 rear and have no complaints.

The first year I had the car I warped the factory rotors. Then I added some very affordable, cool looking rotors that I warped in about six months. RBs were not in my price range for a daily driver and I got a good deal on the DBAs from Maryland Speed. They have been on the car now for well over a year with no issue.

I donít race, but Iím not a hypermiler either!!

Pics? I would love to see.
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Old 06-06-2013, 12:36 AM   #20
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Quote:
Originally Posted by Doc View Post
The nice thing about RB's rotors is they genuinely improve things in 5 different areas as opposed to other rotors which may only improve things in one area at best.

Many rotor upgrades honestly only improve appearance, which for those who buy them is usually the main reason they bought them. They like the drilled and slotted look because they think that makes them look "cool" and "high performance" and that they'll run cooler as a result. The looks are nice but there's an issue with simply drilling holes in a cast, solid rotor, and that's rotational balance. Unless you're using an engineering program that's controlling a computer-controlled drilling setup that's PRECISELY drilling the holes at EXACTLY the right locations around the disc, you're almost guaranteed to throw off the overall spinning balance of the rotor.

Having an out-of-balance rotor does the same thing an out-of-balance wheel/tire does; it causes vibrations, stresses the bearings and can reduce performance as a result. Because the rotor is smaller it may not be so immediately obvious the way an out-of-balance wheel is but the effects are the same.

What's great about RB's rotors (and one of the reasons why they're worth the money) is the slotted/drilled rotors are factory balanced before they're shipped. That's not something most people think about with brake rotors but it's worth knowing and having.

In addition to being a superior brake rotor, RB rotors reduce unsprung rotational weight which improves acceleration, deceleration, cornering and suspension response (all of which has nothing to do with braking), and for actual braking, after hot laps on the track they'll run about 150į cooler than competing rotors which is a significant advantage in avoiding brake fade. And for those who are concerned about looks, they look seriously "cool"; just take an RB rotor out of the shipping box and you'll instantly see why they cost what they do. They make the stock factory rotors look like crude junk by comparison.

It's like losing weight; yes you look better but you're also healthier, feel better and can move faster. It's worth it to save up for RB rotors because they improve things in other areas besides just brakes. No I don't work for them; just a fan of quality products.

And since people have graciously referred to it, here's a link to my project thread which has more info and shows why I convinced Warren and RB to make these rotors available for our Camaros in the first place:

http://www.camaro5.com/forums/showthread.php?t=45165

I was familiar with RB's rotors through Mazda racing (I had a Mazda RX8) and I knew these would be great for the Camaro, and they are.
I am like you as well and appreciate quality products. That is why it is so difficult now having seen a relatively perfect product like the RB rotors to settle for anything less. I think that the DBA 5000 and 4000 rotors would probably do a good job for my vehicle, but I am a perfectionist type and much prefer the looks of the RB rotors, not to mention their other fine performance enhancing attributes you mentioned. Thanks for the nice write up
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Old 06-06-2013, 12:37 AM   #21
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I was happy with them when I had them. Did plenty of events as road course in Phoenix and lots of autoX events.
Remind me what rotors you are running with now?
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Old 06-06-2013, 10:54 AM   #22
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Pics? I would love to see.
I'll try to remember to snap a few pics tonight after work.
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Old 06-06-2013, 06:35 PM   #23
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Ignore the dirt. I live on a dirt road (Georgia red clay) and it has been raining every evening.

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Old 06-06-2013, 09:10 PM   #24
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Ignore the dirt. I live on a dirt road (Georgia red clay) and it has been raining every evening.

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Thanks for the pics!!! They look great. That's the old model of the DBAs but they still look very clean. Looks like they're holding up well.
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Old 06-06-2013, 10:29 PM   #25
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I'm not going get in to the what's better debate, but i wanted to post this article from DBA

If you want a deal on the DBA's pm me or email me



From DBA
This is a common topic that comes up in performance car discussions all the time. Unfortunately there isn’t a simple answer for all applications so we will cover some of the important details to allow you to make an educated decision.

For example ; 
A typical large sedan weighing 1690kg (3725 lbs) is traveling at 134km/h (80 mph) down a freeway and you have to brake quickly. Let’s say the average tires can handle a G-Force of 0.85 before they lose traction. We will decelerate at 0.81 G’s to avoid skidding down the road. This vehicle will come to a stop in approximately87m (285 feet) and generate approximately 1170 kW (1569hp or 1110 BTU/sec) of kinetic energy doing so. This energy has to be transferred through the braking system in order stop the vehicle. When you pump this much energy into the disc rotors in a matter of seconds (4.7s) it generates a lot of heat and the amount of mass or weight in the disc rotor is critical in order to cope with this load.

A typical front disc rotor on a large sedan is approximately 300mm (12in) in diameter and weighs around 9.5kg (21 lbs). We’ll focus on the front disc as it generally takes 70% of the braking load. A disc rotor consists of to main components, the mounting bell which attaches to the axle and the braking band (ring) to which the brake torque is applied via the caliper. The braking band or ring in this disc rotor weighs approximately 6kg . In the above mentioned brake application this 9.5kg disc will increase in temperature by approximately 125 deg C (257 F) in just less than 5 seconds.

Note; “ increase ” = In addition to the current temperature before braking .
If the same 300mm disc weighed 8.5kg (18.7 lbs) with a braking band of 5.5kg then the temperature increase would be closer to 137 deg C (279 F). 10% increase in temperature doesn’t sound all that much but unfortunately heat transfer isn’t all that simple. In a one off braking application an additional 10% probably wouldn’t make a noticeable difference. But what happens in performance driving on or off the track is a series of brake applications at regular intervals. The time between brake applications is rarely enough to allow the disc to recover to the optimal braking temperature so you end up with an accumulation of temperature build up over a period of time. 10% plus 10% plus 10% now becomes an issue!
The other side of the coin! Unsprung weight or rotating inertia!

All performance fanatics talk about reducing unsprung weight. Yes, a rotating disc does have a certain amount of rotating inertia or a flywheel effect which requires power to accelerate and to decelerate. It takes approximately 24 Nm (18 lbf-ft) of torque to get those 9.5kg disc spinning up to 134km/h (80 mph) and back down to zero when braking. The lighter 8.5kg disc requires approximately 20.5 Nm (15.1 lbf-ft) which is a little better than 10% saving in energy required to accelerate and decelerate the same vehicle. On a 6 liter Pontiac GTO with 542 Nm (400 lbf ft) of torque you probably won’t notice a 3.5Nm improvement in torque whereas on an ultra light small performance or race car you may.

Generally a car manufacturer will do all the math explained here and much more to determine the ideal disc mass (weight) for the vehicle and we can assure you it isn’t in their best interests to add weight to their vehicles or give away unnecessary kg’s of metal.

By thinking smarter DBA has developed opportunities to reduce weight without reducing performance by using higher quality disc rotor materials like DBA’s performance range or by replacing stock rotors with two piece designs such as DBA’s 5000 series discs which reduce weight from the mounting bell while maintaining the optimal weight on the braking band.
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