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    Thread: Two-Piece Rotors

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      05-07-2012 11:46 AM #26
      I've had this idea as well. Seems like there's enough interest that maybe we can get a group buy going? According to RB, it's the same rotors for the R32 and R, so maybe they'd want to get in on it too.

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      05-07-2012 11:59 AM #27
      Quote Originally Posted by Peteski View Post
      Some brake pads are not compatible with these rotors, and on top of it they are pricey.
      Quote Originally Posted by TLud View Post
      Thanks for the heads up about the pads. I'll be sure to confirm if I go this route.
      Here is a link with a lot more info on these rotors from an R32 owner. He apparently has had good experience with these rotors and the Carbotech 1521 pads I would like to use.
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      05-07-2012 12:03 PM #28
      Quote Originally Posted by ToeBall View Post
      I've had this idea as well. Seems like there's enough interest that maybe we can get a group buy going? According to RB, it's the same rotors for the R32 and R, so maybe they'd want to get in on it too.
      If interested, shoot me a PM. We can get these for a lot less than the list price. Thanks to Peteski for the hookup.
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    4. Member MasterNele03's Avatar
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      05-07-2012 12:08 PM #29
      Quote Originally Posted by TLud View Post
      If interested, shoot me a PM. We can get these for a lot less than the list price. Thanks to Peteski for the hookup.
      I'd be interested in a set for the GTI if they can do that or if it's a really sweet deal then I'll get the Golf R ones and go OEM BBK
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      05-07-2012 12:14 PM #30
      Quote Originally Posted by MasterNele03 View Post
      I'd be interested in a set for the GTI if they can do that or if it's a really sweet deal then I'll get the Golf R ones and go OEM BBK
      I'm almost positive they can do these for the GTI, but I'll check.
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    6. Member oldracer's Avatar
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      05-07-2012 12:54 PM #31
      Just a reminder - you guys have the MKV r32 brake setup, I'm not sure if your caliper mounts are the same so check that out, but rotors are the same.
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      05-07-2012 01:07 PM #32
      Quote Originally Posted by MasterNele03 View Post
      I'd be interested in a set for the GTI if they can do that or if it's a really sweet deal then I'll get the Golf R ones and go OEM BBK
      Quote Originally Posted by TLud View Post
      I'm almost positive they can do these for the GTI, but I'll check.
      Just confirmed. They do offer these for the GTI.
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      05-07-2012 01:08 PM #33
      Quote Originally Posted by oldracer View Post
      Just a reminder - you guys have the MKV r32 brake setup, I'm not sure if your caliper mounts are the same so check that out, but rotors are the same.
      Correct. Thanks for the clarification on the rotors.
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    9. Member Lamfalus's Avatar
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      05-07-2012 01:33 PM #34
      Quote Originally Posted by oldracer View Post
      Just a reminder - you guys have the MKV r32 brake setup, I'm not sure if your caliper mounts are the same so check that out, but rotors are the same.
      The calipers are different so we don't have the MkV "setup" per se, though the rotors may very well be the same.

      So just to confirm, Front discs - 345 mm diameter, Rear discs - 310 mm diameter?
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      05-07-2012 01:48 PM #35
      Quote Originally Posted by Lamfalus View Post
      The calipers are different so we don't have the MkV "setup" per se, though the rotors may very well be the same.

      So just to confirm, Front discs - 345 mm diameter, Rear discs - 310 mm diameter?
      315mm rears

    11. Member Lamfalus's Avatar
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      05-07-2012 01:55 PM #36
      Quote Originally Posted by ToeBall View Post
      315mm rears
      Hmmmm, VW.com says:

      "Power assisted, dual circuit, vented 345 x 30mm front discs and 310 x 22mm rear discs "
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      05-07-2012 01:56 PM #37
      Quote Originally Posted by ToeBall View Post
      315mm rears
      No, it's 310 mm for the rear.
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      05-07-2012 10:31 PM #38
      Spoke with the folks at Racing Brake a few weeks back and they are also working on matching calipers to go with the 345 rotors. These will be designed with the R in mind for piston sizing and brake balance. Soon you will be able to start with a rotor upgrade, and then add on the light weight calipers later if you "feel the need for speed" at the track. This will make for a nice staging on the upgrade pathway. Some additional info on this setup below, which is apparently even closer to being a reality.

      http://forums.racingbrake.com/showthread.php?t=849
      http://www.racingbrake.com/v/images/vw/RB_MK5_R32.jpg
      http://www.racingbrake.com/v/images/vw/_MG_4909.JPG

      IMHO I would not go with expensive rear rotors that don't take much of the braking load and save my coin for the front axle. Racing Brake even has a 330 mm BBK kit for as low as $1655 on the internet. It is said to lower the unsprung weight by a whopping 22 lbs per corner for a total of 44 lbs per axle. That is some serious weight reduction! With lighter wheels and tires, you are down over 30lbs per corner or 60 lbs for the front axle. There is a review out there from some one who did this and was very happy with the results, but I can't remember where I saw it. I can't quite confirm these numbers yet either. When the rotors get a little smaller though, they of course get even lighter and have less rotational inertia. This also helps acceleration as well. At any rate, food for thought on this subject.

    14. Member MasterNele03's Avatar
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      05-07-2012 10:47 PM #39
      Quote Originally Posted by TLud View Post
      Just confirmed. They do offer these for the GTI.
      Yea I know they have then for the GTI, I'm curious if they'll put those in the group buy or start another group buy for us aswell.
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      05-07-2012 10:49 PM #40
      Found that other post with a full review of the Racing Brake 330 mm BBK kit on an R32.

      http://forums.vwvortex.com/showthrea...ew-impressions

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      05-09-2012 09:18 AM #41
      Quote Originally Posted by takmanR View Post
      Spoke with the folks at Racing Brake a few weeks back and they are also working on matching calipers to go with the 345 rotors. These will be designed with the R in mind for piston sizing and brake balance. Soon you will be able to start with a rotor upgrade, and then add on the light weight calipers later if you "feel the need for speed" at the track. This will make for a nice staging on the upgrade pathway. Some additional info on this setup below, which is apparently even closer to being a reality.

      http://forums.racingbrake.com/showthread.php?t=849
      http://www.racingbrake.com/v/images/vw/RB_MK5_R32.jpg
      http://www.racingbrake.com/v/images/vw/_MG_4909.JPG

      IMHO I would not go with expensive rear rotors that don't take much of the braking load and save my coin for the front axle. Racing Brake even has a 330 mm BBK kit for as low as $1655 on the internet. It is said to lower the unsprung weight by a whopping 22 lbs per corner for a total of 44 lbs per axle. That is some serious weight reduction! With lighter wheels and tires, you are down over 30lbs per corner or 60 lbs for the front axle. There is a review out there from some one who did this and was very happy with the results, but I can't remember where I saw it. I can't quite confirm these numbers yet either. When the rotors get a little smaller though, they of course get even lighter and have less rotational inertia. This also helps acceleration as well. At any rate, food for thought on this subject.
      Can't wait to see what we end up with. I want to see what a stock R caliper weighs. I'm getting it in my head that I want to remove as much weight as possible from my car.

      Short list:
      wheels - 6lbs x 4 = -24
      Passat hubs = -12 total for hubs and LCA
      Passat lower control arms (above)
      rotors = maybe 5 lbs each up front and 3 rear? I'll estimate -16 total
      battery (not relo, lightweight Li-Po replacement) -30lbs
      calipers = -5 lbs total?

      That's -87lbs, maybe conservative on some of that. Would be great to say I cut 100lbs of weight from my car w/o going crazy (other than $$$$ of course )
      Past - 2001 GTI 1.8T, 1997 Jetta GLX VR6
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      05-09-2012 09:26 AM #42
      Quote Originally Posted by Lamfalus View Post
      Can't wait to see what we end up with. I want to see what a stock R caliper weighs. I'm getting it in my head that I want to remove as much weight as possible from my car.

      Short list:
      wheels - 6lbs x 4 = -24
      Passat hubs = -12 total for hubs and LCA
      Passat lower control arms (above)
      rotors = maybe 5 lbs each up front and 3 rear? I'll estimate -16 total
      battery (not relo, lightweight Li-Po replacement) -30lbs
      calipers = -5 lbs total?

      That's -87lbs, maybe conservative on some of that. Would be great to say I cut 100lbs of weight from my car w/o going crazy (other than $$$$ of course )
      And apart from the battery, all of what you listed is unsprung weight, the majority of which is rotating mass.

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      05-09-2012 09:27 AM #43
      Quote Originally Posted by Lamfalus View Post
      Can't wait to see what we end up with. I want to see what a stock R caliper weighs. I'm getting it in my head that I want to remove as much weight as possible from my car.

      Short list:
      wheels - 6lbs x 4 = -24
      Passat hubs = -12 total for hubs and LCA
      Passat lower control arms (above)
      rotors = maybe 5 lbs each up front and 3 rear? I'll estimate -16 total
      battery (not relo, lightweight Li-Po replacement) -30lbs
      calipers = -5 lbs total?

      That's -87lbs, maybe conservative on some of that. Would be great to say I cut 100lbs of weight from my car w/o going crazy (other than $$$$ of course )
      I'm thinking of doing the same thing. I might get some really lightweight wheels and save 10lbs per corner. There is an easy 60lbs+ to shave with wheels and rotors. The only thing I will not do again is get a lightweight battery. It sucks in the winter time when it comes to being consistent in starting the car.

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      05-09-2012 10:36 AM #44
      Quote Originally Posted by Lamfalus View Post
      Can't wait to see what we end up with. I want to see what a stock R caliper weighs. I'm getting it in my head that I want to remove as much weight as possible from my car.

      Short list:
      wheels - 6lbs x 4 = -24
      Passat hubs = -12 total for hubs and LCA
      Passat lower control arms (above)
      rotors = maybe 5 lbs each up front and 3 rear? I'll estimate -16 total
      battery (not relo, lightweight Li-Po replacement) -30lbs
      calipers = -5 lbs total?

      That's -87lbs, maybe conservative on some of that. Would be great to say I cut 100lbs of weight from my car w/o going crazy (other than $$$$ of course )
      Yes! I want to be in the lightweight club too!!!

      My plans are similar to yours, but I probably won't change the hubs/LCAs.

      My goal is -100 lbs through wheels, rotors, maybe calipers, battery, carbon fiber hood (painted to match), and the removal of some unnecessary things.
      Parting out KW Coilovers, Competition Haldex, VWR Shortshifter, HPA Dogbone Mount: http://forums.vwvortex.com/showthrea...7#post88047307

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      05-09-2012 11:09 AM #45
      Quote Originally Posted by takmanR View Post
      Spoke with the folks at Racing Brake a few weeks back and they are also working on matching calipers to go with the 345 rotors. These will be designed with the R in mind for piston sizing and brake balance. Soon you will be able to start with a rotor upgrade, and then add on the light weight calipers later if you "feel the need for speed" at the track. This will make for a nice staging on the upgrade pathway. Some additional info on this setup below, which is apparently even closer to being a reality.

      http://forums.racingbrake.com/showthread.php?t=849
      http://www.racingbrake.com/v/images/vw/RB_MK5_R32.jpg
      http://www.racingbrake.com/v/images/vw/_MG_4909.JPG

      IMHO I would not go with expensive rear rotors that don't take much of the braking load and save my coin for the front axle. Racing Brake even has a 330 mm BBK kit for as low as $1655 on the internet. It is said to lower the unsprung weight by a whopping 22 lbs per corner for a total of 44 lbs per axle. That is some serious weight reduction! With lighter wheels and tires, you are down over 30lbs per corner or 60 lbs for the front axle. There is a review out there from some one who did this and was very happy with the results, but I can't remember where I saw it. I can't quite confirm these numbers yet either. When the rotors get a little smaller though, they of course get even lighter and have less rotational inertia. This also helps acceleration as well. At any rate, food for thought on this subject.
      The 330 mm SBK piqued my interest as well, and I agree with you that the best bang for the buck is in the front. That said, I'm going to upgrade to the standard size RB rotors and possibly do the front caliper upgrade when they finish it.

      Quote Originally Posted by sh{}e View Post
      I'm thinking of doing the same thing. I might get some really lightweight wheels and save 10lbs per corner. There is an easy 60lbs+ to shave with wheels and rotors. The only thing I will not do again is get a lightweight battery. It sucks in the winter time when it comes to being consistent in starting the car.
      Exactly. I saved 8 pounds of rotating mass per corner with wheels and tires. Saving an additional 8 pounds of rotating per corner in front and 3 pounds per corner in rear would give me a total savings of 54 pounds of rotating mass, which is huge.
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      05-09-2012 11:13 AM #46
      Great, now you guys are telling me there's calipers on the way as well? You're spending too much of my monies!

    22. Member Lamfalus's Avatar
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      05-09-2012 12:33 PM #47
      Quote Originally Posted by ToeBall View Post
      And apart from the battery, all of what you listed is unsprung weight, the majority of which is rotating mass.
      I know!
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    23. Member Lamfalus's Avatar
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      05-09-2012 12:34 PM #48
      Quote Originally Posted by sh{}e View Post
      I'm thinking of doing the same thing. I might get some really lightweight wheels and save 10lbs per corner. There is an easy 60lbs+ to shave with wheels and rotors. The only thing I will not do again is get a lightweight battery. It sucks in the winter time when it comes to being consistent in starting the car.
      Bay Area California so not much winter to speak of.
      Past - 2001 GTI 1.8T, 1997 Jetta GLX VR6
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      05-09-2012 03:55 PM #49
      Quote Originally Posted by TLud View Post
      The 330 mm SBK piqued my interest as well, and I agree with you that the best bang for the buck is in the front. That said, I'm going to upgrade to the standard size RB rotors and possibly do the front caliper upgrade when they finish it.
      Put any thought in to the VWR BBK? Looks like a 7-8lb savings per corner with big meaty 352x32 rotors. The cost compared to the RB kit in development looks to be very close.

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      05-09-2012 04:32 PM #50
      Quote Originally Posted by webcrawlr View Post
      Put any thought in to the VWR BBK? Looks like a 7-8lb savings per corner with big meaty 352x32 rotors. The cost compared to the RB kit in development looks to be very close.
      It looks like a great kit also, but like I said earlier, the stock brakes perform just fine for my purposes. Unless I win the lottery and my schedule miraculously opens up, the amount of time my car will spend on a high speed track will most likely not justify getting a BBK. At this point, I just want lower dusting street pads with good modulation and lighter two-piece slotted rotors (also saves 8 pounds per corner in front). Odds are, I won't ever touch the calipers.

      My only concern with the VWR BBK (and possibly the RB BBK) would be for those guys who want to run 17" wheels on the track, which won't work. That's where that 330 mm kit becomes an interesting option.
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