: 2-pc rotors F + R



Naf
03-25-13, 04:26 PM
I am in the market for brake rotors, and would love to get the brembo rotors but the 10 bolt hats are hard to find. I need 355mm up front and 365mm in the rear, basically stock dia...

I have a custom set with 12 bolt hats and my slotted rotors have seen better days...

Ideas?

darkman
03-25-13, 06:43 PM
My front 2-piece rotors came from Luke at Lindsay. Mine are UUC, which I believe is discontinued but Luke had another supplier with a newer version awhile back. http://www.cadillacforums.com/forums/2004-2007-cadillac-cts-v-performance/263975-2-piece-front-rotors-04-07-a.html

My rear 2-piece rear rotors, with parking brake drums included, are from Racingbrake dot com.

AAIIIC
03-25-13, 10:50 PM
Check with Coleman Racing - they can pretty much do whatever you need for 2-piece rotors.

Naf
03-26-13, 02:55 AM
Darkman, i looked up the RB system, and may i say WOW on the price, its gonna be about $2000 plus shippin, I am currently in talks with Porterfield Enterprises, they are able to get me the brembo rotors i desire, i am just waitin on the billet hats. Brembo T3 or T5 grooves ROCK, and give great bite, i just have to swap out the pads more often, which is an expense i can swallow...

Darkman did you get the open slotted rotors or just plain slotted rotors?

Curious to hear how the open slotted perform...

Sent an email to Luke about the Giro Discs, they look promising...

darkman
03-26-13, 06:59 AM
I have the plain slotted rotors so I cannot report on the performance of the open slot option.

When I added UUC 2-piece rotors to the front the difference was immediately noticeable. The steering effort on turn-in was reduced and brake pad noise, which had been significant with the pads I run, went away.

When I added the Racing Brake 2-piece rotors to the rear the difference was not particularly noticeable. In theory, there was some reduction to rotating weight which never hurts, and the brake pads should work better, but the change in feel produced by the fronts was not there.

Naf
03-26-13, 08:28 AM
Hmm, more food for thought..

Dug up an old thread and maybe this just may be my answer,

http://www.cadillacforums.com/forums/2004-2007-cadillac-cts-v-performance/219790-v2-rotor-caliper-retrofit-v1-cars.html

I can get the 370 for the front and the 365 for the rear and call it a day. It will just be a matter of gettin the right rotors, i still think Luke will have the hook up, As he always does...

Not to mention later i can get brembo or AP racing rotor rings and not have to worry about discs for a while...

Now will the V2 system fit in my 18" wheels, thats the question

UnsafeAtAnySpd
03-26-13, 07:48 PM
What 18s? The OEM wheels? According to other threads, they work as well as the TD wheels. I'm working on going that route myself.

Naf
03-27-13, 01:30 AM
i have HRE C21 18" front wheels...I snuck my finger between the caliper and rim so i am good to go...

Will be ordering the Racebrake 370 front and 365 rear...I will also give my calipers a once over with a new coat of paint...

What are your all thoughts on G2 caliper paint?

AAIIIC
03-27-13, 07:50 AM
I've used the G2 stuff and two different types of Duplicolor caliper paint. The G2 is way, way more durable. I actually need to order some, as I've got some new rear brakes coming for my Mustang that I'll need to make pretty to match the Stoptechs up front. :)

Naf
03-27-13, 10:07 AM
just ordered their kits, gonna do yellow calipers with black logos, will stick out for most ppl here go with red calipers...Was gonna go with Pink, but i think thats a little over the top

My tahoe has black calipers and i love the incognito brake kit

FuzzyLogic
03-27-13, 10:10 AM
I've been toying with the idea of replacing my front rotors with 2-piece rotors for some time. What kind of weight reduction would I be looking at, and (if you know off-hand) at what cost?

Jeff James
03-27-13, 11:16 AM
Has anyone gone the Coleman 2-pc. route yet?Six lug for V-2 rotors?? How about the 2 pc. V-2 rotors vs. 1 pc. on V-1s? If so , Glen has the program for hats and can do rotors any size. I know , alot of questions in one post but Bring it ON!!

crankedupforit
03-27-13, 11:51 AM
I've been toying with the idea of replacing my front rotors with 2-piece rotors for some time. What kind of weight reduction would I be looking at, and (if you know off-hand) at what cost?

25.8 vs 19. 13.6 lbs total savings. The GiroDisc rotors are the UUCs.

FuzzyLogic
03-27-13, 12:11 PM
25.8 vs 19. 13.6 lbs total savings. The GiroDisc rotors are the UUCs.

That's a pretty significant difference. Do you remember how the car felt versus the stock rotors?

crankedupforit
03-27-13, 12:54 PM
That's a pretty significant difference. Do you remember how the car felt versus the stock rotors?

Turn in felt crisper and the unsprung weight advantage seems to settle the car better. You can feel a difference for certain.

Naf
03-27-13, 01:01 PM
Its like switchin from the stock clutch to the zo6, it was enough to keep u wantin more but not enough to satisfy u to leave it alone

AAIIIC
03-27-13, 02:15 PM
My ass dyno isn't that finely tuned - I can't say I notice any difference between my normal rotors and my 2-piece rotors.

crankedupforit
03-27-13, 03:11 PM
My ass dyno isn't that finely tuned - I can't say I notice any difference between my normal rotors and my 2-piece rotors.

Your ass needs a tune up then. ;) Most folks I heard from including fake racing experts concur that the steering felt lighter.

Jeff James
03-29-13, 10:25 PM
Apparently no-one has had Rotors/Hats done by Coleman yet. I know the most common V2 -V1 conversion has been with the OE 1 pc rotors. Has anyone played with the newer 2 pc OE units that are on the V2 and ZL1 Camaro? Betcha the hats could be copied cheap and sold at a reasonable price. Anyone??

AAIIIC
03-29-13, 10:54 PM
The 2-piece rotors on the V2 (and I'm assuming ZL1 are the same) are co-cast. There's no separate hat to be copied and used with a different ring.

crankedupforit
03-30-13, 08:49 AM
Apparently no-one has had Rotors/Hats done by Coleman yet. I know the most common V2 -V1 conversion has been with the OE 1 pc rotors. Has anyone played with the newer 2 pc OE units that are on the V2 and ZL1 Camaro? Betcha the hats could be copied cheap and sold at a reasonable price. Anyone??

I thought Yooper had some 2 piece protype Colemans (?) made for his V2 to V1 brake conversion. I remember borrowing him my Team Dynamic wheels to see how they would fit with the new set up at Road America. I have some pictures somewhere.

Junior1
03-30-13, 11:29 PM
I've got both the new Girodisc 2pc and the Coleman 2pc setup for the V1. The Coleman's are 2pc front and rear, whereas the Girodisc are only 2pc fronts. Currently have the Coleman's on...

https://lh3.googleusercontent.com/-jX3EQ_25Oh8/Tqr7b5M5HKI/AAAAAAAAArI/80CHjAJi2wc/s640/IMG-20111028-00159.jpghttps://lh4.googleusercontent.com/-XjsJFa6jSzI/Tqr77bsQHWI/AAAAAAAAArs/rIWiF-65mU8/s640/IMG-20111028-00162.jpghttps://lh6.googleusercontent.com/-6KVRPPHywgE/T_sQF6vbxJI/AAAAAAAABAw/ZiGeDki4kUw/s800/IMG-20120709-00084.jpghttps://lh3.googleusercontent.com/-yhEjNAW7o0I/UDrXDzrJkTI/AAAAAAAABGM/wFeCpXmbIdk/s800/IMG-20120826-00131.jpghttps://lh5.googleusercontent.com/-dqmCu8dV-uU/T7VYXfTOVvI/AAAAAAAAA7w/EauoQyxCxj8/s800/DSC00228.JPGhttps://lh6.googleusercontent.com/-0-oIlZ3PpEE/UDLlQrSRP3I/AAAAAAAABDs/DzzVAOFZKFE/s800/IMG-20120820-00109.jpg

FuzzyLogic
03-31-13, 12:10 AM
Notice anything? Are the hats a little shorter than usual?

Naf
03-31-13, 01:29 AM
I bought the racing brake V2 size for the V1. Its simple, its plug and play and i can buy brembo rotors later if need be...

UnsafeAtAnySpd
04-01-13, 10:27 PM
Are the Racing Brake the only V2 option other than redrilling right now? I have UUC hats I'd really like to reuse. Otherwise I'm about to pull the trigger on the calipers, etc.

Naf
04-02-13, 02:22 AM
From what i know Racing brake are the only ones offerin this option. Finally got notification that my order was shipped...

You can score V2 calipers for about 1500 unless you get the red ones, where you will be payin a shit load for a color..

full set in yellow about 1600$, each front caliper in red 1000$...I think GM doesnt want us to buy the red ones...

OneFast V
04-02-13, 12:29 PM
From what i know Racing brake are the only ones offerin this option. Finally got notification that my order was shipped...

You can score V2 calipers for about 1500 unless you get the red ones, where you will be payin a shit load for a color..

full set in yellow about 1600$, each front caliper in red 1000$...I think GM doesnt want us to buy the red ones...

You can buy V2 calipers for $750 new straight from rock auto or on ebay.. $750 for both fronts.

JDB
04-02-13, 05:01 PM
Prices of these 2 piece are absurd. What's the life expectancy? Driven daily 365 days for 8-10k miles and a handful of track days.... rings better make it a couple if years. Otherwise, i'll stick with stock or DRT slotted.

FuzzyLogic
04-02-13, 05:11 PM
Prices of these 2 piece are absurd. What's the life expectancy? Driven daily 365 days for 8-10k miles and a handful of track days.... rings better make it a couple if years. Otherwise, i'll stick with stock or DRT slotted.

I agree that the prices are absurd, but provided that you plan on eating a few sets of rotors, the cost is quickly absorbed over the lifetime of the car. It's also one of the only ways to reduce unsprung weight. DRT slotted rotors are awesome, btw.

Naf
04-03-13, 04:54 AM
i have had mine for a while, and just recently i had to change the ring part, the hats are good for yrs, but the rings should be replaced with hardware, rings arent very expensive...

JDB
04-03-13, 09:17 AM
i have had mine for a while, and just recently i had to change the ring part, the hats are good for yrs, but the rings should be replaced with hardware, rings arent very expensive...

My definition of aren't expensive is different than yours unless you're referring to other rings/sources ....because Racing Brake front 2-piece are $966.94 (pr) and replacement rings (pr) are $531.82 ...so 2 sets would be about $1500. DRT / Centric slotted rotors (1 piece) are $207.90 (pr). I could buy annual rotors for 7 years and buying the 8th set to finally break even.

I know, I know... unsprung weight savings of 5-6 lbs / corner.... but, come on, it's not even the same $ ballpark.

Would these 2-piece rings last 30-40k street miles and 10-12+ track events? That's about what I was getting out if Stoptech rings on my Audi A4 but that was also increased size of brakes going from stock calipers to 4 piston Stoptech calipers and 332mm rotors. Lots of brake on a sub 3200 lb car.

AAIIIC
04-03-13, 03:08 PM
For brake systems that have hats designed to use the dirt cheap circle track 12" and 13" rotors from Coleman or Pegasus Racing or whoever, I think you could make a case for 2-piece rotors being cheaper in the long run. In this application, though, there's no way it can be justified on the financial aspects. As you pointed out, JDB, the replacement rings are pretty damn expensive, so the whole "well, you only have to replace the rings, which don't cost that much" argument really doesn't fly. I bought them anyway, though, cuz that's how I roll. :)

For the V2 rotors on a V1 scenario, it works out a bit closer, since the OEM V2 rotors are pretty expensive to begin with, and then have to be re-drilled (which I did myself) and also have the hub opening enlarged (which I paid a machine shop to do). But even in that case, Centric is now making a V2 front rotor that's only $84 thru Rockauto.com - I don't think it's a 2-piece co-cast rotor like the factory part, but it shouldn't be all that much harder to re-drill and machine if it's got a cast iron center vice aluminum.

sssnake
04-04-13, 11:49 AM
I've got both the new Girodisc 2pc and the Coleman 2pc setup for the V1. The Coleman's are 2pc front and rear, whereas the Girodisc are only 2pc fronts. Currently have the Coleman's on...

https://lh3.googleusercontent.com/-jX3EQ_25Oh8/Tqr7b5M5HKI/AAAAAAAAArI/80CHjAJi2wc/s640/IMG-20111028-00159.jpghttps://lh4.googleusercontent.com/-XjsJFa6jSzI/Tqr77bsQHWI/AAAAAAAAArs/rIWiF-65mU8/s640/IMG-20111028-00162.jpghttps://lh6.googleusercontent.com/-6KVRPPHywgE/T_sQF6vbxJI/AAAAAAAABAw/ZiGeDki4kUw/s800/IMG-20120709-00084.jpghttps://lh3.googleusercontent.com/-yhEjNAW7o0I/UDrXDzrJkTI/AAAAAAAABGM/wFeCpXmbIdk/s800/IMG-20120826-00131.jpghttps://lh5.googleusercontent.com/-dqmCu8dV-uU/T7VYXfTOVvI/AAAAAAAAA7w/EauoQyxCxj8/s800/DSC00228.JPGhttps://lh6.googleusercontent.com/-0-oIlZ3PpEE/UDLlQrSRP3I/AAAAAAAABDs/DzzVAOFZKFE/s800/IMG-20120820-00109.jpg

do you have part numbers for the Coleman setup? Front rotors need replacing and I am considering dong this with the engine build.

Jeff James
04-06-13, 03:32 PM
If Coleman already has the 6 lug hats for the front (part numbers please!!)and offsets are the same(it seems like people have done V2 calipers on V1 rotors,so they must be OK) Coleman can do a slightly larger diameter rotor to match the v2 size. Someone chime in here. Yes, the initial cost is more than OE stuff but Coleman was always pretty reasonable price-wise and can do just about anything.

Junior1
04-06-13, 09:13 PM
Call Bob @ PerformanceAFX, 815.254.2631. Not really a Part number per se.
The hats were custom made to mate to an existing C5 Coleman Ring. The Coleman rings have the part number which is a standard Coleman item.
Since brakes are a consumable item, the standard C5 ring makes it a lot easier/cheaper than buying a one-off item each time...

sssnake
04-08-13, 11:39 AM
Thanks I'll give him a call

FuzzyLogic
09-23-13, 08:46 PM
Does anyone recall what the price and weight was for the Coleman 2-piece rear was? Were they full floating or not? I finally wound up buying the RacingBrake 355mm front rotors for $700 on Amazon (HUGE savings). Based on a tip from OneFastV, I called RacingBrake and they confirmed that the 370mm rings (D501-02-381) will fit both product. So in reality, I just got a set of 355 and 370mm rings for the cost of the 370mm kit.

http://i1345.photobucket.com/albums/p663/Fuzzylog1c/V2%20Brakes/DSC01501_zps2192cab7.jpg (http://s1345.photobucket.com/user/Fuzzylog1c/media/V2%20Brakes/DSC01501_zps2192cab7.jpg.html)

I also briefly talked to them about their brake line kit. All they would say is that it's "not re-branded from Goodridge," which makes me wonder if it's from Girodisc. Still up in the air about whether to buy ET500 or ET800 pads, but I'm stoked about these rotors.

jclayc
09-23-13, 09:37 PM
I've got the Coleman 2pc rears on my car. If I have time tomorrow I'll pull one and weigh it. I don't think it's a true floating design, but judge for yourself - they look like this pic: http://shop.performanceafx.com/images/100_2155.jpg

I think I paid $420 per hat/rotor. I can give part numbers for the fronts but don't have an invoice for the rears on file for some reason.

I need new rings for the rears and called Performance AFX last week and talked to them but Bob wasn't in and the brother wasn't familiar with the ring measurements I have. They have the front replacement rings on their site but the rears I have are bigger than any c6 rear. I need to call back...

FuzzyLogic
09-23-13, 09:41 PM
Any idea what the weight was on those? And the parking brake still works, right?

jclayc
09-23-13, 09:46 PM
Yes, parking brake still works - I'll pull one off the car tomorrow and will weigh it.

OneFast V
09-23-13, 11:30 PM
I also briefly talked to them about their brake line kit. All they would say is that it's "not re-branded from Goodridge," which makes me wonder if it's from Girodisc. Still up in the air about whether to buy ET500 or ET800 pads, but I'm stoked about these rotors.

I'd recommend the EBC yellowstuff, 1/2 the price of the racing brake pads and did extremely well for me on many tracks with no fade through out the session.

Naf
09-24-13, 02:55 PM
Dtc 60 for racing and hps for the street...

Hawk are more consistent, i had all sorts of pads and these worked out for me the best...

OneFast V
09-24-13, 05:57 PM
Dtc 60 for racing and hps for the street...

Hawk are more consistent, i had all sorts of pads and these worked out for me the best...

I have the HP+ now and i can say for the same relative price as the EBC yellowstuff the pad is about 15% smaller. As far as on track perfromance i believe the yellowstuff was a little better as the HP+ did get a little worse later in a hot day.