Big Brake Mod (Brembo, StopTech, Wilwood) 13"/14" Front Discs

Did you lay them ontop of eachother face-to-face? You can't really see 5mm of crosssectional difference like that. The size difference plays too many games with my eyes. If I have some downtime at work this evening, I'll take a picture or two of the difference.

that picture is not mine. I ordered one it should be here tomarrow . Its funny since the 12" f-body rotors and 12 " impala rotors ( share our bolt pattern) have the same part #.

oldsman105 wrote:

that picture is not mine. I ordered one it should be here tomarrow . Its funny since the 12" f-body rotors and 12 " impala rotors ( share our bolt pattern) have the same part #.

That's true. I tried to check it out today but I didn't have any of the rotors that are said to fit the vettes or cts's in stock. I don't like how many different part numbers there are depending on the year and car... Oldsman, do you have the pads for those calipers or no?

Yes they have new pads in them.

-bookmarks topic-

That's a 5x120 vette rotor sitting on our stock 5x115 hub. It don't fit.



There's the part numbers for reference. That rotor is what lists for a C5 and it seems to have directional vents, therefore two part numbers. I measured it with a tape measure and it's exactly 13".

I ordered a gxp rotor to check out. That should fit our hub. The caddy CTS lists a bunch of different part numbers for rotors

BD126023 : 07 CTS non-V
BD126021 : 06-07 CTS w sport sus.
BD126187 : 06-07 CTS JE5
BD126193 : 04-07 CTS J56

I believe the only rotors that go with these -V calipers are the J56 rotors but I thought I read somewhere that the CTS-Vs have 6 lugs??

Cts-v has 6 lugs. I have the 14" C6 rotor I didn't have a chance to pull my wheel off.


Oh well I guess I will throw these back on ebay.

Which model GXP rotor did you order?

Tiss is life.



oh well.

How hard would it be to have a machinist pop out a 5x115 hole pattern on one of these? I was just thinking that you see the "universal" rims done the same way with 5x120 and 5x115 hole's all the time. I wouldn't imagine it costing more than $25-$50 at max. I had 8 lbs of flywheel removed and a resurface for $50. It couldn't be that hard... What am I missing??

I mentioned this to my mechanic today, and he said it's possible to have custom rotors made. I'm googling around trying to find one. Maybe here

In case the F-Body brake mod just won't do, here is a big brake kit now available that is supposed to fit '97-99 Rivieras. Supplied by Precision Brakes Company for HorsePowerFreaks.com - if they fit, this would be the next step up in the search for ultimate braking performance (suitable for road course racing, ie. repeated stops from 120+ mph). If you aren't planning to take the car to the track, the main reason to buy such a kit would be for looks. Imo, they do look pretty cool.

Rotors are 13" dia x 1.1" thick, 2-piece w/ alum hats, available drilled, slotted, drilled & slotted, or plain.
Calipers are 4-piston 'Forged Superlight' (FSL) from Wilwood, various powder coating colors available.

Kits include necessary brackets and hardware, stainless steel brake lines, and brake pads (likely are Wilwood BP10, a high performance street pad).

Probably not the exact set, but close:



Price for fronts: $1,649.34

Order from: HorsePowerFreaks.com

I've read the sets are made to order, so may take a while to get these. Not a bad price for what you get. I would bet lots of money this 'kit' is not designed specifically for Riviera, so it probably not balanced as well as stock. May need some testing/tuning to get things dialed in for safe high speed operation.

More info found here: http://www.stangnet.com/mustang-forums/576316-precision-brakes-company.html

A rear set is also available, link: https://rivperformance.editboard.com/t4381p60-12-rear-disc-brake-mod#80300

OOO, those look nice. I just wish i could put 12" rotors on my '96 without changing the whole setup. Nice find though.

Thats a lot of dough, However Wilwood is worth the cost. Id love to see how these mount up and if they do in fact fit the Rivi.

it looks like they have for the 95 too. they specify 92 to 99. i wonder?

Rears only for '95. That makes sense. But '97-99 for fronts. Looks like they did their homework. Really, any big brake kit for previous gen Camaro should work on '97-up Riviera. Just need the right brackets and should bolt up. Rotors are the same 12" stock, would need larger wheels for 13" size.

when you say "previous generation camaro" what years are you talking about?

^^^^^ F-Body/LS1(98-02)

Here's a front kit from StopTech that is designed for F-body Camaro. Should fit our cars with F-Body brake mod and 17" wheels or bigger (see Autoanything's wheel fitment guide for more info):

StopTech part#: 83.183.4600.71 - $2195.95 shipped from www.autoanything.com

I wonder how likely it is to find one of these in a pick-n-pull on a wrecked Camaro/Firebird.

Probably have to get there right when they put the thing on blox.

Albertj

Proabably not likely. If it were my Camaro, I'd yank them off after wrecking the car.
If it were my pick-n-pull yard, I'd yank them off as soon as they arrived on the wrecker.

AA wrote:

Proabably not likely. If it were my Camaro, I'd yank them off after wrecking the car.
If it were my pick-n-pull yard, I'd yank them off as soon as they arrived on the wrecker.

Back when I was buying a few sets of F-Body caliper sets to re-build, I received a set of PBR calipers by mistake that were almost brand new, if not darn close to new.
Unfortunately they did not have the correct F-Body brackets and the pistons were smaller than the other F-body stuff I received so I had to ship them back for a swap and received GM F-Body calipers and brackets in return.
My point being is that the high end stuff had already been removed from the car and still looked new where the others appeared to have been sitting in the yard a little longer and required bead blasting and overhaul to make new. The condition of the PBR's were such that I would have bolted them on my car the way they were if they were correct for my car.
Most likely the junk yard pulled them as soon as receiving the car, yet a worker there shipped them to me by mistake and was verified it was a mistake after talking to the owner about them.
Some high end stuff may slip through the cracks but not much.

I know this topic's been hibernating for a while, but I found a similar topic at LS1Tech where the F-Body guys found a way to make the CTS-V calipers work with 14" rotors. I have to think, if we can swap to F-Body, and they've made it work, then this can happen on a Riv. It's a lengthy read, but seems realistic:

http://ls1tech.com/forums/suspension-brakes/1117381-super-cheap-big-brake-kit-info.html

Does anyone know, were the CTS-V calipers ever sold?

Interesting...
It looks as thought the pads for the CTSV calipers are much smaller than the Fbody pads. However, 14" rotors should make a huge improvement regardless.
Guess i need to see if i have the 1"+ of clearance with my 18's.

UPDATE: I've done some researching - if you look around, pairs of used big brake calipers come up for sale from time to time on other automotive boards. One of the popular choices for calipers that will fit our cars is the forged 4-piston StopTech ST-40 (Standard) and STR-40 (Trophy Racing). The standard ST-40s are the calipers included with the 83.183.4600.71 kit posted above. Actually, these calipers will fit many different cars, depending on the brackets included. For our (F-Body) application, they are meant to be used with 13.1" x 1.25" (332mm x 32mm) rotors. Here are some pictures of the units:

ST-40 (also available in blue yellow, or gold):


STR-40 are ultra lightweight, and feature silicone dust boots (only in grey):


Specs (click for larger image):


Because these calipers are used on many cars, including: Honda, Ford, Audi, Porsche, Mitsu and BMW, look for sales postings for used ST-40 / STR-40 calipers in forums for these cars, in addition to F-body and LS1 forums (Camaro, Firebird, GTO, Corvette). The reason these calipers get sold is because their owners often upgrade to the ST-60 6-piston calipers. Stoptech products are track-proven, quality products designed to last, and are rebuildable.

A few links to used calipers that sold for reasonable prices:

http://forums.evolutionm.net/vendor-used-parts-classifieds/585134-stoptech-st60-st40-brake-calipers-cheap.html ($400)

http://nasaforums.com/viewtopic.php?t=26415&p=187311 ($450)

http://www.twinturbo.net/nissan/300zx/forums/classified/view/150925/Stoptech-ST40-calipers-t-top-shades-intercooler-pipes-etc.html ($450)

http://forums.triplezoom.com/showthread.php?3190353-FS-2x-Stoptech-4-Piston-ST-40-Calipers-and-brackets-650-shipping. ($650)

http://forums.clubrsx.com/showthread.php?t=803139 ($800)

http://www.mycarforum.com/index.php?autocom=classified&req=showprod&product=10956 ($800)

I'm sure these used calipers don't come up for sale often, and when they do, there are buyers willing to pay, so if you find a pair, might want to snatch them up quickly! Please post any links to this thread if you come across any good deals.

Re: CTS-V Calipers:

Info on 14" rotors w/ 5x115 pattern:
http://www.cadillacforums.com/forums/cadillac-cts-first-generation-forum-2003/60652-cts-big-brake-14-rotors-5x115.html

Info that may be helpful for matching CTS-V and other calipers to our cars: http://lukeskaff.com/?page_id=333
^^^ read through Luke Skaff's following pages to see how real brake modifications are done!

Another good big brake reference from LS1tech: http://ls1tech.com/forums/3228097-post1.html

If anyone wants to try finishing what Oldsman started, GMparts direct apparently offers the CTS-V/Brembo calipers for about $270/pair: Link - IF THIS IS LEGIT, THAT'S NOT A BAD PRICE!

Also here are a set of front/rear for ~$350 on eBay. I have no idea if the rears can be made to fit.

http://www.ebay.com/itm/04-07-Cadillac-CTS-V-Brembo-Calipers-Brake-Upgrade-Front-Rear-/320825277258?pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr&hash=item4ab2ad3b4a

Another set starting at $306+freight, from Cleveland Pick-A-Part (where I bought my F-Bodies):

http://www.ebay.com/itm/04-07-Cadillac-CTS-V-OEM-BREMBO-Brake-UPGRADE-Front-Rear-Calipers-/310369952505?pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr&hash=item48437da2f9

And check these out: http://shop.zzperformance.com/store/p/963-Brembo-Front-Caliper-Upgrade.aspx

From an '08 Cobalt SS, listed in the 3800 section. ZZP: "front calipers with brackets. They will bolt right on a LSJ car." I think they may have listed them wrong. LSJ means Ecotech, right?

sooooo.... has anyone figured out anything about getting a 14" rotor in 5 x 115 bolt pattern?

I know oldsman104 recently finished the cts-v upgrade on his GTP. But I'm not sure what got used for rotors.

I'm seriously looking at going right to the cts-v calipers when I go to coilovers this winter. If the only hang-up is 14" rotors, I can always poke a 5 x 115 pattern into a Z06 rotor. One of the mills at the shop can plot hole patterns, so its not too hard.