The GT-Four Brake Upgrade, ST205 Brake Upgrade for 5x100 & 5x114 PCB Options

[Tigawoods]

This is a GUIDE not a HOW TO and is a thread in progress. Its going to take me a bit to properly organize this load info into a visually pleasing manor.

If anyone has any input from their own experience post or PM me and I will add the info in! There is alot of info in here and I am sure it will get very convoluted


**Be aware that the ST205 Brake upgrade will require at least a 16" wheels and possibly spacers to adjust the offset and avoid contact between the face of the caliper and the backside of the rim face. **



Torque Specs
Caliper halve bolts (four bolts that hold the caliper halves together)
14-17 ft/lbs *Have an even torque value on each bolt (add a dab of red loctite to the bolts thread ends)

Caliper Seal Part Numbers:

Stephen at GT-FourPlay UK sells a rebuild kit. You can still get the kit lsited below from rock auto but Stephens kit is alot more straight forward and youd be supporting Local (UK) business!
https://www.gt4-play.co.uk/shop/brake-calip...ce-kit?___SID=U

Caliper Re-seal Kits (Centric Brand From Rock Auto)
Front Seals X4 #14344031 (kits are used for the small crossover seals for all 4 calipers/the piston seals in this kit are too large so the rest is unused)
Rear Seals X2 #14342021 (Each Single kit services 2 calipers. These piston seals are used for the front too)
(I need to re-confirm that the rear piston seals fit the front pistons)
This will cover the crossover seals/piston seals/piston boots/piston retaining rings

Caliper Hardware Part Numbers
(Need to add the Pad Pin retaining wire #'s & toyota diagram)

Front pin clips: #04947-14010
Front pad pins: #90240-06019
Front shims: #04945-14110 (EBC pads come with stick on shims)

Rear pin clips: #04948-14010
Rear pad pins: #90240-06017
Rear shims: #04946-14030 (EBC pads come with stick on shims)




Front Hub/Caliper Preparation:
(These part#'s correspond to the McMaster-Carr Catalog. I highly recommend ordering hardware from them: www.mcmaster.com as they have VERY fast shipping and exceptional products)

Caliper Prep:
For the rotor to sit center in the caliper, the mounting tabs on the caliper will need to be shaved a slight bit.
Use a DREMEL and shave 7-8mm off of the mounting tabs. START OFF SMALL and shave say 5mm and check clearances, it is quite possible that with whatever spec rotor you use or just slight differences in hub thicknesses may not require a 7-8mm shave

(keep in mind that if you plan on powdercoating the calipers, that will add 1mm or so on top of the mounting tabs, unless you leave them uncoated.)

Use a Micrometer to make sure that the mounting tab is an even #mm across the entire area you shaved.




Hub Prep:
_____________________________________________

The stock hubs are thread-less and will need to be threaded. Below are the specs I prepped my hubs to but also a small description of what Culpable did with his hub. The way I did it requires a bit more drilling, and it is possible to just re-tap the thread-less hub holes rather than drill them out and re-tap. If you drill the hubs you will possibly need to drill out the caliper holes to match. The tap information is listed below.


CULPABLES THREAD (link at bottom of this post):
take the knuckle off the car and thread tap them thread taps are available anywhere, buy matching bolts for the thread you are tapping ( grade 8 bolts please ) use a 1/2 x 20 tap or finer thread. ( the one used on the pictures is 9/16 x 20 but no need to go that big as that will require to drill the hole to make it a little bigger)
______________________________________________

Carbon Steel Hand Tap, 9/16"-18, 4 Flute (I will add the kind of tap wrench that is best for tapping the hubs)
#26035A216


Drill for Tap
33/64
http://www.mcmaster.com/#catalog/119/2432/=oglxb8
8947A217 - 118 Degree Point High-Speed-Steel Short-Length Drill Bit, Black Oxide, 33/64", 3-7/8" Length Overall - $18.92
(CALIPER HOLES WILL ALSO NEED TO BE RE-DRILLED IF USING THIS SIZE, MAKE SURE TO DRILL TO MATCH THE DIAMETER OF THE BOLT YOU ARE USING TO MOUNT THE CALIPERS, THIS DRILL BIT WILL BE TOO SMALL)

Grade 8 Alloy Steel Hex Head Cap Screw, Zinc Yellow Pltd,9/16"-18 Thrd, 1-1/4"l,fully Thrd
#92620A779


(Large washers are used in between the Front Caliper bolts and Hub and one washer has to be trimmed per axle, I will add their sizes later)

The Brake dust shield will fit and no modification is needed other than pushing it back a bit to avoid contact with the rotor (WITH 300mm Rotor).


Rear Hub Preparation:

I was fortunate enough to get the oem caliper bolts with the calipers in the kit from Culpable. I will get their specs since those are the bolts you will need to mount the caliper, the oem ST204 bolts are too short.

The rear dust shield will need a good amount of trimming (use a small dremel) for the caliper to fit. Its hard to really explain where it will need to be cut exactly, but just hold up the ST205 caliper to its mounting mount and you will be able to judge where it will make contact with the dust shield. Both around the top and bottom mount holes on the hubs will need to be trimmed. (If you plan on powdercoating your calipers make sure to do this before, I scratched my newly powder coated calipers holding them up trying to judge how much more I needed to trim)

When mounting the Rear Calipers, there needs to be a 6mm spacer washer between the caliper holes and mounting bracket.
This will correct and center the caliper to match the lower rotor height of the ST205 disk (The ST205 disk is 6mm smaller than the GT disk). As a temporary solution I used 2 washers (2.5mm thick) per hole that when stacked added up to about 6mm. Washers usually have a thickness tolerance of +/- .3mm so I had to sort through a whole bunch to finally find a combination that added up to the right spec. Anywhere between 5-6mm will work fine but the closer to 6mm the better

The better solution, as discussed with ricochet1490, would be to get a custom made 6mm thick washer.

McMaster sells extra thick high strength steel washers, I am ordering a few to test them out, supposedly the thicknesses of the washers arent consistent but we will see



Rotors:

OEM Celica Dimension Specs


Front:

Be aware of the hub diameters. The OE Celia hub diameter is 54.1. Most of our options for the front will be larger than that.
I personally like to have hubcentric rotors but you can run them lug centric if you dont feel like making a shim, I would advise against that though.

Subaru BRZ/Impreza Rotor
Part Number: Centric 121.47021
PCB - 5x100
Hub Dia - 58
Dia - 292mm
Centric Brand Part Number: 121.47021

(additional info on aftermarket solutions will be added soon thanks playr158 for the find!)

93-99 Toyota Supra NON-Turbo
PCB - 5x114.3 (Must Be Re-Drilled)
Hub Dia-60.1
Dia-296mm / 11.811"

****Most OEM and OEM replacement Supra Non-Turbo rotors have service holes on the face of the hat preventing them from being re-drilled to 5x100, Most aftermarket 2-Piece Rotors do not have these service holes allowing the hats to be re-drilled. Always check before purchasing. THIS MAY NO LONGER BE A VIABLE OPTION****




5x114.3 Conversion Front Rotors
93-99 Toyota Supra NON-Turbo
Supra Hub Dia-60.1
Dia-296mm / 11.811"

Rear:

ST205 Rear Rotors
Hub Dia-54.1
Dia-315mm

I highly recommend EBC Brand through this site
http://www.ebcbrakesdirect.com/ (Fast Int'l Shipping with Tracking code!)
Here you have the option of OEM/SlottedDimpled/Slotted

ENDLESS also makes a Slotted and Blank Rear Disk
Blank Rotor (Single) $176
Slotted Rotor (Single) $225
ENDLESS Rotor PDF

5x114.3 Conversion Rear Rotor
***TBD****

Brake Pads:

Supra MK4 Turbo Pads
I recommend EBC brand pads as they come with black 3M rubberized stick on shims. Do Not use both the stick on rubber shim and the metal Toyota/Other brand shim.
Part#
Front
DP31004C
Rear
DP31005C

Some other brands that have both streetable performance and race performance pads that will fit are

-HAWK Pads
-Carbotech Pads
-Endless Pads

I have only ever used EBC pads so I have never needed Shims from Toyota. I am not sure if other brand pads come with some sort of shim. If they don't you will need to order a set of shims

3M Stick on Shims




Brake Lines:

ST205 Lines

ST204 (GT) Lines

Custom Lines (recommended)


Bleeder Fittings

Speed Bleeder #SB1010
Buy them. They work wonders


Caliper High Temp CELICA Stickers
http://www.ebay.com/usr/uber9
Since the sale is re-listed weekly I cannot provide a direct link. Sreach for "celica" and the results will show up. Be sure to message the seller to specify it is for the ST205 Calipers


Brake Bias Controller
One thing that will be immediately apparent with this swap is a different brake bias than what the GT/ST provided.
The bias wont be the same for every car this swap is done for. There are alot of factors that will effect the ration ever so slightly. Worst case scenario your rear bias will be too much to the point of locking up way before the fronts get a chance too. For DD emergency situations, this may be undesirable.
Combat this will installing a Brake BIAS Controller.
I recommend Tilton as the brand to buy but there are other more budget friendly brands.



Brake Proportioning Info
http://stoptech.com/technical-support/tech...rtioning-valves

Additional Links/Reference Links:
ST205 Brake Upgrade Completed (Culpable04)
ST205 Brakes on a ST (Culpable04)
ST205 Brake Upgrade Completed (Batman722)
Toyota Supra Specifications


End Goal?


This post has been edited by Tigawoods: Dec 6, 2018 - 9:58 AM

[yellowchinaman]

That is really useful.
Im doodling on the idea of adapting a set of Audi Q7 Sline calipers to my faff.

[playr158]

Thanks TIGA. I was going to do the same with the information you gave me.
I'll probably photograph the whole thing to add to this thread.

Since the supra rotors are 5x114 I'm also thinking about doing the complete 5.x114 hub conversion at the same time..


agian thanks for putting this together!

[njccmd2002]

but then you have to redrill the gt4 rears... u have to redrill some rotors...

[playr158]

I believe there might be some bolt on rotors but need to see

[Fate]

*subscribed.

[Tigawoods]

Thanks TIGA. I was going to do the same with the information you gave me.
I'll probably photograph the whole thing to add to this thread.

Thatd be helpful. I did not take a single picture of anything when I was going through it

I believe there might be some bolt on rotors but need to see

There are definitely some out there, itd be nice to get a list. And it would be great if they where the right size specs and 5x100! If not then at least we would have some alternatives to the Supra rotors since as noberto found out the hard way...they cant be redrilled, the OEM ones atleast

[playr158]

Well if we use

FRONT: GEN 1 RAV4 front hubs + MKIV NA Supra rotors + GT4 front calipers = bolt on

REAR: 91-96 Camry rear HUB/Bearing assembly + Camry rotors = bolt on.
The question is here is what larger rotor is needed for the rear GT4 caliper. I thought I had a potential option written down somewhere so now I have to go find it. This might honestly be as simple as contacting adams rotors and having them make a larger diameter rotor based off the camry oem rotor....which would be easy and cheap I thinks.

[njccmd2002]

well how big are the rear supra rotors?

[Tigawoods]

300mm I believe

[njccmd2002]

duh, how thick are the rear supra rotors. thats what i meant sorry...


OH and for those of you that want to buy OEM supra rotors, dont, they have 10 holes.... (arg)

[Tigawoods]

15mm methinks. Either that or 17mm

[Tigawoods]

added a couple more things.

I will add the links on how to swap to 5x114 in the OP

Also maybe some tips as to how to remove the pistons from the calipers if you plan on powder coating and/or replacing the piston seals

[playr158]

Wanted to Toss this in there

http://www.mcmaster.com/#catalog/119/2432/=oglxb8
8947A217 - 118 Degree Point High-Speed-Steel Short-Length Drill Bit, Black Oxide, 33/64", 3-7/8" Length Overall - $18.92

[Tigawoods]

thanks man!

[njccmd2002]

Bringing this back from dead. Called adamsrotors, and the guy who was an asshole, pretty much told me not to wast his time all the questions are in his website. They don't do custom rotors, in a sense of different hub pattern, but in a sense of pretty colors and bs. Which leaves me stranded, here in this miserable town, nobody wants to do or even knows how to redrill rotors to 5x100. Lol.

[Fate]

Bringing this back from dead. Called adamsrotors, and the guy who was an asshole, pretty much told me not to wast his time all the questions are in his website. They don't do custom rotors, in a sense of different hub pattern, but in a sense of pretty colors and bs. Which leaves me stranded, here in this miserable town, nobody wants to do or even knows how to redrill rotors to 5x100. Lol.

Sounds very similar to my email conversation with him roughly 2 months ago.

I have a local place trimming my front st205 rotors to 300mm as my temporary solution for now. The same place I recently found out also does re-drills.

[Tigawoods]

I will have to update the OP!

[njccmd2002]

we have to find a source of rotors that will meet our needs, so far, i have only seen racing rotors in the ups of 300+ per rotor, lol.

the problem i have, no one, absolutely no one wants to touch and redrill a rotor here. they are afraid.

[njccmd2002]

ok, classic example why i need to get my own tools, its stupid, in this town, no one wants to help. Jackson TN. How bad could it be, just need a jig, and a drill press. right?

ive got the jig already.

[playr158]

That's actually really smart......wheel spacer with proper bore and a drill press. Technically you could get away with a standard drill but press makes life way better.

I'll have a picture step by step of this conversion in about two weeks

[njccmd2002]

yeah man, im tired of trying to get someone to do this. i have been dying to have a reason to buy a drill press, and this might be it...

[njccmd2002]

just found this

subaru impreza sti

326 x 30 mm

hub 58

height 52.7

its 5 x 100. so its 2 mm shy of 32. but when we resurface gt4 rotors, thats prolly where they end up at...

[Fate]

ok, classic example why i need to get my own tools, its stupid, in this town, no one wants to help. Jackson TN. How bad could it be, just need a jig, and a drill press. right?

ive got the jig already.

i like!

[Tigawoods]

I'll have a picture step by step of this conversion in about two weeks

we can combine to make....the ULTIMATE conversion thread!

[njccmd2002]

Tiga, do you have a set of brake lines that already dont recommend. I know the slot is empty, i may start to look around, but wanted to see what u have tried.

I bought a wrx sti rotor today, for giggles. ill get it on the third. since no one here wants to redrill, i figure ill work my way with a bracket, if it even works, lol

[playr158]

326? isn't that too big for the GT4 setup?
I thought we were looking for 300mm?


I just got my Tap and drill bit today, standard from mcmastercarr is overnight for me
Picking up everything else for my project at fastenal tomorrow am.

[njccmd2002]

yes i know, but it will be easier to get the rotor reduced in size than redrill to 5x100 in this damn town.

[Tigawoods]

300mm MAX.

Let me throw that brake line info in, but ST205 lines will work if you can find them, or SS GT lines will fit (I used the rears in the front and the fronts in the rear since the fronts were getting close to stretching when at full lock, when switched they operate just fine)

[njccmd2002]

Cool, I'll keep looking for those lines. Once I get the rotor in ill post the experience, lol this is the fifth rotor. After 2 supras I can't drill and 2 gt4 I don't want to use spacers on.

[Trodai]

300mm MAX.

Let me throw that brake line info in, but ST205 lines will work if you can find them, or SS GT lines will fit (I used the rears in the front and the fronts in the rear since the fronts were getting close to stretching when at full lock, when switched they operate just fine)

302mm will work also that what i have on my car well its act slightly larger but 302mm works well in mine..(mine are reduced st205 discs) , I would be wary of the pads you choose to use also as some have the braking material located differently on the backing plate and this can have you braking surface of the pad coming out over the top of the disc. have you looked into Vw discs they easily available to you over there? some of those are 300mm, Subaru seem to be the most common for this conversion

I can post pictures of my conversion of the Gt-four brakes on the st202 hubs if you like?

This post has been edited by Trodai: Nov 27, 2013 - 4:13 PM

[bnr32celica]

300mm MAX.

Let me throw that brake line info in, but ST205 lines will work if you can find them, or SS GT lines will fit (I used the rears in the front and the fronts in the rear since the fronts were getting close to stretching when at full lock, when switched they operate just fine)

302mm will work also that what i have on my car well its act slightly larger but 302mm works well in mine..(mine are reduced st205 discs) , I would be wary of the pads you choose to use also as some have the braking material located differently on the backing plate and this can have you braking surface of the pad coming out over the top of the disc. have you looked into Vw discs they easily available to you over there? some of those are 300mm, Subaru seem to be the most common for this conversion

I can post pictures of my conversion of the Gt-four brakes on the st202 hubs if you like?

VW makes a disc that's 288mm or 312mm. More than likely, Subaru would be likely to have an 11.9" (300mm) rotor that would fit.

[Malek]

300mm MAX.

Let me throw that brake line info in, but ST205 lines will work if you can find them, or SS GT lines will fit (I used the rears in the front and the fronts in the rear since the fronts were getting close to stretching when at full lock, when switched they operate just fine)

302mm will work also that what i have on my car well its act slightly larger but 302mm works well in mine..(mine are reduced st205 discs) , I would be wary of the pads you choose to use also as some have the braking material located differently on the backing plate and this can have you braking surface of the pad coming out over the top of the disc. have you looked into Vw discs they easily available to you over there? some of those are 300mm, Subaru seem to be the most common for this conversion

I can post pictures of my conversion of the Gt-four brakes on the st202 hubs if you like?

Yes, please post pics haha

What size disc spacers did you use for the front?

[Trodai]

my conversion (copied from my build trend in another form)
st202 wishbone with Polish bushes
st202 drop links.. (after working on a carlos a while back wondering will the st185 drop link fit? and same dimensions? i need to check this out)Updatewill be fitting Polish drop links when due replacig
st202 balljoint the size of the casting seems to differ in manufacters so some will be tighter than others some just wont fit with the full sized disc in oem fitting position
St202 front strut casing with koni inserts and st202 shock top and st182 spring rubbers( Springs will be changed back to St205 Oem or st205 trd
St205 caliper with mounting point machined to help mounting surface contact and allow disc clearance inside of caliper
1mm spacer made up to fit inside disc to help clear balljoint
st202 hub with the brackets threaded and custom grade 11 bolts(iirc they are same grade as oem anyway) made up so there is a shank that fits inside the st205 caliper hole so it has a good snug fit..., the st202 hub uses the same wheel bearing as the st205 so was happy with that.. i am also using st202 abs sensors,
st205 subframe
st202 ARB with Polish Arb bushings
st205 steering rack with modified st205 inner and outer tie rods
st205 disc reduced to 304mm diameter (would suggest going 1mm or 2mm smaller at this was slightly rubbing the retaining clip fro brake pad pins.
here are the pics

I have more if needed the bolts are grade m14x1.25mm grade 11

here is a picture of 2 different brand of brake pads as you can see one has less material that the other and is also lower placed on the backing plate

are the subaru discs not 295mm and 297mm? i will probably replace mine again with machined st205 discs but if i wasn't i am looking at Volvo discs 302mm diameter and 26mm thickness? even 296 supra discs?, Volkswagen Caravelle models have a 300mm vented disc

[99gt3sge]

just found this

subaru impreza sti

326 x 30 mm

hub 58

height 52.7

its 5 x 100. so its 2 mm shy of 32. but when we resurface gt4 rotors, thats prolly where they end up at...

yeah that's what i was researching too, the 04 sti is really close to the gt specs but just larger in diameter, i was going to trim it down with my brake lathe. let me know how it works out. i still need to buy a set of calipers before i buy the rotor to play with.

[playr158]

Just a thought....BRZ rotors are approximately 295x25.5 mm AND 5x100

This post has been edited by playr158: Dec 24, 2013 - 1:45 PM

[BonzaiCelica]

if you see newcelica.org there is a guy who bolted(without modification) on avensis caliper and 295mm rotor onto his 7th gen celica.

i don't know the thickness of the rotor though

[jeffrosie]

Only 26mm thick.

[playr158]

Honestly the 4mm or whatever is not going to make a difference. Thickness is really a marginal issue as it will be compensated for by the pads.

This post has been edited by playr158: Jan 14, 2014 - 2:30 PM

[njccmd2002]

ok, so the STI rotor sits awesome on the car, but the extra offset of 5 mm that clears the ball joint is so bad that makes the caliper seat not centered.

[playr158]

More english prease?!

The rotor sits perfect and does not hit the ball joint. But is off center to the caliper is what i'm gathering.

Does it sit too much towards the inside of the car or does it sit more towards the outside?

and your previous post said it was 326mm diameter...isn't it 26mm too large for the caliper as well?

This post has been edited by playr158: Jan 12, 2014 - 9:38 PM

[njccmd2002]

found this on ebay, bought the last set, what are the chances...

http://www.ebay.com/itm/SET-OF-4-ALUMINUM-...04e&vxp=mtr

[Tigawoods]

make sure they dont sit higher than the rotor face!!

[njccmd2002]

More english prease?!

The rotor sits perfect and does not hit the ball joint. But is off center to the caliper is what i'm gathering.

Does it sit too much towards the inside of the car or does it sit more towards the outside?

and your previous post said it was 326mm diameter...isn't it 26mm too large for the caliper as well?

the rotor sits perfect, and the brake surface is excellent.

however i would either have to grind up to 5 mm from the caliper bracket area to even have it centered. i cannot even measure how much that rotor has to be resized, however i will post a pic in a couple of hours.

the rotor sits too much towards the outside, if we could find a caliper for this rotor, it woud be awesome....

[njccmd2002]

pics...







but.... to keep caliper centered....

lots of grinding..



even trying to bolt caliper outside.. using a 20 mm spacer..

so just keep it simple, and get the supras, if you are able to find some that can be drilled and someone to do it...

or you want this rotor, you need to find another caliper.



lots of grinding....



that puts the rotor and wheel to far away from the center of rotation, and thats a no no...

[playr158]

Honestly, We could easily have an adaptor bracket made for this. (IE small block of aluminum cut and drilled) So that the caliper sits in the correct place and we have a bolt on rotor.

It looks like the caliper mounting holes are sitting right on top of the knuckle holes. This would be a pretty easy adaptor to fab up.

Then I could get these:
.

[njccmd2002]

well actually no, because the caliper is not all the way sitting down and grasping the rotor... it still needs to be pushed down at least 10 mm, and still the holes do not align.

i was looking also at a camry spindle, looks alot like our celicas, with the difference of the mounts spaced further, giving chance of a bracket, but then again, too much trouble when u can just drill supra rotors.

[playr158]

Gotcha.
Well like all you other nuts, I picked up a "X" rotor today. We'll see how she fits and i'll report back, it should fit minus a 7mm offset.
Which is an easy $25 spacer and that's it, much easier than drilling.

PS njccmd2002 I saw your thread about brake rotors and the Subaru. I assume this was your research for the STI rotor.

To add information

CELICA GT OEM ROTOR
_____________________
Outer Dia:.....275mm
Height:.........49.3mm
Nom Thick:....28mm
Min Thick:......26mm
Hub Reg:.......55mm
Bolt Size:.......14.5mm
Weight:.........15lb

This post has been edited by playr158: Jan 16, 2014 - 2:11 PM

[njccmd2002]

yup sti rotor

[playr158]

sooooooo.........BOLT ON

Rotor:
Part Number: Centric 121.47021
292MM FRONT DISC

*I do believe there is a 295mm disc as well*






(NOTE: This is with worn ST205 OEM pads, and unconnected calipers)

[Tigawoods]

[njccmd2002]

Subaru rotor? Thats good. Looks like regular impreza. Hmmm that is awesome. Maybe 2 mm shim spacers each side and perfect!!!!!

[playr158]

Yup BRZ, Legacy, Impreza wrx and a few others share this rotor.

I'm getting DBA 5000 two piece

[Tigawoods]

Info added! Thanks Dan!

I will be adding more info over the next few days as to our new found added options!

This post has been edited by Tigawoods: Jan 17, 2014 - 11:31 AM

[Syaoran]

That's a nice find. Two questions:

You removed the dust shield for the rotors right?

How did you compensate for the difference in height?

[playr158]

I never had dust shields on this setup with the brz rotors.

There is no compensation, put everything on normally.

[Syaoran]

So an update to this thread would be

Front: ST205 calipers bolted on and WRX front rotors bolted on

Rear: ST205 Calipers shimmed 5mm away from the bracket towards thr rotor and ST205 rotors?

Now we need to find an ST205 rotor replacement since I'm guessing they're gonna get hard to find and more expensive as time goes on.


The only thing I dont like about the setup is that the front brake rotors are smaller than the rears, 20mm smaller, too.

[Tigawoods]

So an update to this thread would be

Front: ST205 calipers bolted on and WRX front rotors bolted on

Rear: ST205 Calipers shimmed 5mm away from the bracket towards thr rotor and ST205 rotors?

Now we need to find an ST205 rotor replacement since I'm guessing they're gonna get hard to find and more expensive as time goes on.


The only thing I dont like about the setup is that the front brake rotors are smaller than the rears, 20mm smaller, too.

that stuff had been added to the OP already.

St205 rotor replacement for what the rears? If so I have a site from the UK that sells EBC oem replacements. I doubt they will discontinue them for a while.

My personal experience with the larger rear rotors is that the brake bias feels ALOT more even. Braking isnt as nose heavy and the car doesnt dive forward at all during heavy braking, which I find VERY helpful when I race.

[Syaoran]

So an update to this thread would be

Front: ST205 calipers bolted on and WRX front rotors bolted on

Rear: ST205 Calipers shimmed 5mm away from the bracket towards thr rotor and ST205 rotors?

Now we need to find an ST205 rotor replacement since I'm guessing they're gonna get hard to find and more expensive as time goes on.


The only thing I dont like about the setup is that the front brake rotors are smaller than the rears, 20mm smaller, too.

that stuff had been added to the OP already.

St205 rotor replacement for what the rears? If so I have a site from the UK that sells EBC oem replacements. I doubt they will discontinue them for a while.

My personal experience with the larger rear rotors is that the brake bias feels ALOT more even. Braking isnt as nose heavy and the car doesnt dive forward at all during heavy braking, which I find VERY helpful when I race.

That's interesting...

Yeah I was suggesting a replacement for the rears that perhaps we could find local to us.

[Tigawoods]

That's interesting...

Yeah I was suggesting a replacement for the rears that perhaps we could find local to us.

Ah gotchya. I think the 205 rears are out best bet.
The only downsides of that rotor are the spacing of the caliper and the ebrake shoe only has half contact on the inner drum.

Those arent really terrible downsides in my eyes.

the company in the UK that I have listed in the OP ships super fast with tracking too

I will keep my eyes open for any rotors that look like a match to the 205 rears

This post has been edited by Tigawoods: Mar 27, 2014 - 1:19 PM

[playr158]

Can a mod sticky this thread alreaddy?!

[Tigawoods]

yeah! sticky!

still looking at rotor options since thats the main concern I believe

this is the centric rotor specs for a 2005 Subaru Impreza
specs are basically the same as the brz, but this one is a few lbs. lighter



I am searching around for big brake upgrade rotors for the wrx and brz.

Stoptech (centric) has a BBk for the WRX but the rotors are too large (328mmx28mm)

well actually it seems like alot of the BBK kits for the wrx and brz are 328mm.

Id also like to merge a bit of the info from the 5x114 conversion into this thread so that it can show some info for people that would like to switch hubs when converting, Ill also have to add the possible rotors for that too. Rico will be a good source of info for that.

AP racing has a 2 piece rotor with pretty good dimensions but the thickness may be 1mm too much



also here is a list of cars with a 5x100 bolt pattern. maybe we can find another option out of the list (for some reason out cars were omitted from this list, i grabbed it from vwvortex) The best possible options will probably come from turbocharged compacts. Non-turbod compacts dont seem to have much over 270mm

2000-2006 Audi TT (4 cyl.)
2000-2006 Audi TT (4 cyl.) Quattro
2000-2006 Audi TT (V6) 1980-1998 Buick Skylark
1989-1996 Chevrolet Beretta
1982-2005 Chevrolet Cavalier
1989-1996 Chevrolet Corsica
1995-2001 Chrysler Cirrus
1988-1993 Chrysler Fifth Avenue (FWD)
1988-1993 Chrysler New Yorker
2001-2010 Chrysler PT Cruiser
1996-2006 Chrysler Sebring Convertible
2001-2006 Chrysler Sebring Sedan
1986-2000 Dodge Caravan
1990-1995 Dodge Caravan (AWD)
1984-1993 Dodge Daytona
1988-1993 Dodge Dynasty
1996-2000 Dodge Grand Caravan
1994-2006 Dodge Neon
2003-2006 Dodge Neon SRT 4
1980-1994 Dodge Omni GLH
1980-1994 Dodge Shadow
1980-1994 Dodge Spirit
1995-2007 Dodge Stratus Sedan
2001-2007 Dodge Stratus R/T Sedan
1990-1991 Lexus ES 250
1992-1997 Oldsmobile Achieva
1992-1997 Oldsmobile Achieva S
1992-1997 Oldsmobile Achieva SC
1992-1997 Oldsmobile Achieva SL
1982-1991 Oldsmobile Calais
1982-1991 Oldsmobile Ciera
1982-1991 Oldsmobile Cutlass
1982-1988 Oldsmobile Firenza
1980-1985 Oldsmobile Omega
1984-1988 Pontiac Fiero
1984-1988 Pontiac Fiero GT
1986-1998 Pontiac Grand Am
1985-1994 Pontiac Sunbird
1995-2005 Pontiac Sunfire
2003-2008 Pontiac Vibe
2009 Pontiac Vibe 1.8
2005-2006 Saab 9-2X
2005-2010 Scion TC
2008-2011 Scion XD
2008-2009 Scion XD TRD
1997-2011 Subaru Forester
1993-2009 Subaru Impreza
2002-2009 Subaru Impreza WRX
2003-2004 Subaru Impreza STI
2010-2011 Subaru Impreza 2.5 2010 Subaru Impreza WRX
2003-2010 Toyota Corolla
2002-2009 Toyota Matrix 2009 Toyota Matrix S
2010 Toyota Matrix Base
2004-2011 Toyota Prius
2006-2009 Toyota Prius Touring
1998-2010 Volkswagen Beetle
1998-2009 Volkswagen Beetle turbo
1993 Volkswagen Corrado SLC (V6)
1993-1998 Volkswagen Golf III GTI
1993-1998 Volkswagen Golf III VR6
1993-1998 Volkswagen Golf VR6
1999-2005 Volkswagen Golf IV
1999-2005 Volkswagen Golf TDI
2004 Volkswagen Golf R32
1999-2005 Volkswagen GTI 1.8T
1999-2005 Volkswagen GTI VR6
1993-1998 Volkswagen Jetta III GLX
1995-1998 Volkswagen Jetta III VR6
1999-2005 Volkswagen Jetta IV (4 cyl.)
1999-2005 Volkswagen Jetta IV VR6
1992-1997 Volkswagen Passat VR6

This post has been edited by Tigawoods: Mar 28, 2014 - 1:51 PM

[richee3]

Can a mod sticky this thread alreaddy?!

Added to the stickies.

[njccmd2002]

with a 5x14 hub change, just use oem supra rotors...

[Syaoran]

That's interesting...

Yeah I was suggesting a replacement for the rears that perhaps we could find local to us.

Ah gotchya. I think the 205 rears are out best bet.
The only downsides of that rotor are the spacing of the caliper and the ebrake shoe only has half contact on the inner drum.

Those arent really terrible downsides in my eyes.

the company in the UK that I have listed in the OP ships super fast with tracking too

I will keep my eyes open for any rotors that look like a match to the 205 rears

Yeah you guys have it great. In my case, it's 320 just for shipping, which is 4x as much as shipping anywhere in the US.

This is stupid XD

[Tigawoods]

ship it to me on the east coast and then Ill ship it to you! It would probably be a heck of alot cheaper

with a 5x14 hub change, just use oem supra rotors...

BOOM.



Ill have to ask rico what he did for the rears again for his hub change

[playr158]

5x114 swap only works if you don't have AWD
I need to find 5x114 hubs / rotors that will work for AWD

oh and still no 2-piece for the supra rotors

This post has been edited by playr158: Mar 29, 2014 - 11:56 AM

[Syaoran]

ship it to me on the east coast and then Ill ship it to you! It would probably be a heck of alot cheaper

I'll keep that in mind. Thanks.

5x114 swap only works if you don't have AWD
I need to find 5x114 hubs / rotors that will work for AWD

oh and still no 2-piece for the supra rotors

Well, if you think about it, if it's already AWD it already has GT-Four brakes which would make this thread pointless for whoever's doing it.

BUT doing the 5x114.3 hub swap might just be a redrill deal..

[playr158]

Unless you have my car or a few others here who have/are doing AWD swaps and keeping McPherson suspension..

[Syaoran]

Unless you have my car or a few others here who have/are doing AWD swaps and keeping McPherson suspension..

But then what I said wouldn't apply, because it's not "already AWD". lol

[Fate]

Id also like to merge a bit of the info from the 5x114 conversion into this thread so that it can show some info for people that would like to switch hubs when converting, Ill also have to add the possible rotors for that too. Rico will be a good source of info for that.

Man oh man do I have a lot of information to add!

[Fate]

FACTORY SPECS:



FYI:

MODEL________YEAR_____BOLT PATTERN_________STUD SIZE______HUB/CENTER BORE_______OFFSET

CELICA_______86-96________5x100______________12x1.5____________54.1_______H
CAMRY_______92-UP________5x114.3_____________12x1.5____________60.1______H
CAMRY/solara__99-UP_______5x114.3_____________12x1.5_____________60.1______H
RAV4_________96-UP________5x114.3____________12x1.5_____________60.1______H
Rotor Options:

FRONT:

93-99 Toyota Supra NON-Turbo




REAR options:

93-99 Toyota Supra NON-Turbo



*Height too large at 67.35mm?
*Stock GT4 is 59, GT is 65

2003-2012 Infiniti fx35



* Hub size 6mm too big, bolt size 12.7, should be 14.5

2010-2013 Lexus RX350



*Nom Thick, should be 16 (6mm too small)


BEST OPTION (IMO), and what I will be running:

2002-2010 Lexus SC430/ 01-05 Lexus is300/ 95-05 gs300 / 98-00 gs400 / 01-05 GS430



*Nom thick, should be 16mm, 4mm off - Do not see this as an issue

*Hat height of 63.3 should allow for proper contact of GT E-Brake shoes. Stock GT4 hat height is 59 (reported issues of only 1/2 of E-Brake making contact) and standard GT hat height is 65.

[mkernz22]

5x114 swap only works if you don't have AWD
I need to find 5x114 hubs / rotors that will work for AWD

oh and still no 2-piece for the supra rotors

Wouldn't the mkiv supra hub work in the rear for the awd knuckle on the celica?..

[Tigawoods]

thanks rico!
Ill add that stuff tomorrow.

You've fit the rears on already right?
The smaller diameters of those options you listed compared to the 315mm GT4 rotors seems like it could be an issue. 6-9mm seems to be the range of difference from what you've listed. It isnt MUCH but its something.

[playr158]

Wouldn't the mkiv supra hub work in the rear for the awd knuckle on the celica?..

Honestly I don't know. It comes down to shape/splines/thickness and there aren't diagram/measurements on the internet like there are for rotors.
That and usually only the Dealer sells them and for not cheap.

2002-2010 Lexus SC430/ 01-05 Lexus is300/ 95-05 gs300 / 98-00 gs400 / 01-05 GS430

This looks like a pretty good option for rear rotors and a 5x114 GT4 rear brake conversion

[Tigawoods]

2002-2010 Lexus SC430/ 01-05 Lexus is300/ 95-05 gs300 / 98-00 gs400 / 01-05 GS430

This looks like a pretty good option for rear rotors and a 5x114 GT4 rear brake conversion

the 8mm difference from the ST205 315mm concerns me.
What do you think?

My setup with the 315mm ST205 rotors has the pads right at the edge of the rotor


the rotors are thinner than the ST205's because the 205rears are vented. just a remark.

This post has been edited by Tigawoods: Apr 2, 2014 - 11:22 AM

[njccmd2002]

Mr2 rear hubs is another option... For awd

[playr158]

^some how I completely missed the concept of an MR2 rear hub

[Tigawoods]

just thinking about this the other day and how that these smaller diameter rotors will change the braking bias of the car. I cant say for certain to what extent though. My F:300 and R:315 is a great balance. Its possible that a few MM's off the front might not make too much of a difference. Just thinking out loud

continue with your day.

[Fastbird]

I'll be ordering Rav4 Hubs, bearings, poopra rotors shortly for mine. Even though I'm selling. I have these big calipers and have been meaning to do this for a LONG time. Props to Tigawoods for the good info. I only last year discovered the Rav4 hub swap which totally changed the game for this. Fortunately, my Tenzo R DC5 wheels are a dual 5 x 100 and 5 x 114.3 bolt pattern.

[olilaroche]

The Centric C-TEK Drilled & Slotted Brake Rotors
from 2012 impreza wrx (227.47021R and 227.47021L) seems like a pretty good deal for the front.

from what I've found its 294mm.

What are you using as a 5x100 replacement for st205 front disc besides of impreza?

[felipeandrest205]

Im looking on Evo 6 brake discs.
Celica brake discs diameter is 315mm, Evo 6 is 320mm, with proper machine could decrease it to 315mm
Celica brake disc thickness is 32mm max and 30mm min, Evo 6 thickness is 32mm max and 29.8min, so its ok.
Well here comes the problem, hat height of the Celica brake disc is 59mm and the evo 6 is 43,5mm, so a spacer could fix the 11.5mm difference of the height, it should be ok?
Hub bore of the Celica brake disc is 55mm and Evo 6 is 69mm, just need to bored the hun hole to 55, it could be possible?

The best is that 2 front brake discs of evo 6 is just 85,49 on camskill

[Tigawoods]

Thanks to Fate for pointing it out to me, but I made an itsy bitsy large oversight in the swap details, and the step necessary step of shaving off some of the inside of the front caliper like such



Him and I will be looking into the exact thickness it will need to be shaved down to, but it looks like that amount may vary depending on the rotor thickness you will be using.

[Batman722]

about 2mm IIRC.
I would love to find out the exact.

reference
http://www.6gc.net/forums/index.php?showtopic=74140

This post has been edited by Batman722: Jan 22, 2015 - 5:24 PM

[Tigawoods]

about 2mm IIRC.
I would love to find out the exact.

reference
http://www.6gc.net/forums/index.php?showtopic=74140

I was wondering where that image came from, Fate just handed it to me haha. Im going to add the link to the FP

He was telling me that some have shaved of 5mm+/-

I am going to measure the thickness of mine next week and Fate is going to measure the thickness of the stock bracket so we can get some solid numbers

This post has been edited by Tigawoods: Jan 23, 2015 - 6:59 AM

[felipeandrest205]

For the rear brake rotors, I was looking at the WRX (G3) up to 2007, there are some difference from the height, but maybe can do something

DBA 2663 WRX
Specifications
Diameter 290
Height 64
Thickness 18
Min Thickness 16
C/Hole 58
Bolt holes 5 X 100 PCD

CELICA
Vent Vented
Diameter 315
Height 59
Thickness 16
Min Thickness 15
Centre Hole Dia 55
Bolt Holes 5

There are just 5mm of difference on the height and a minor difference on the thicknes. Anyone has tested this?

WRX from 2009 and up, rear brake rotors have a 64mm of height vs 59mm of the Celica ones, maybe there could be an option

[njccmd2002]

Ok. To add more fuel to drama. I have found rotors very close to spec. For the scion frs. I have been looking on phone so i may have missed some stuff.

http://www.fr-sforum.com/forums/targa-newf...920/topics/8058

Some pics to summariZe



It comes as a kit. Wonder if rotors can be sold



This is where i get lost.


It states 299 mm with 32 mm diameter and 5x100.

Wonder if sold separately and if they are centered for the gt4 caliper

[njccmd2002]

Found the disc....

http://counterspacegarage.com/ap-racing-cp...disc-right.html

[Fate]

http://counterspacegarage.com/products/bra...gt86-right.html

^Complete assembly

[Tigawoods]

ORLY??

[njccmd2002]

I l know its pricy investment initially however. More adapt for track...now the question if it fits!!! Lol

[MGCustoms325]

That's not a bad price. I spent a lot more on my TRD Front BBK. Wish this would've been around before I bought my set.

[mi645]

so? front gt4 calipers with those counterspace garage rotors and tapping thread on the factory hub and all bolt on?

[njccmd2002]

No,no, no. We dont know the offset specs of those rotors.

The hat looks too tall

[Culpable04]

I printed the image and while I could not get it to print at scale, I got it very close to, given that is not 100% scale ( yet ) I cant say it with certainty, but it does seem to fit,


but if my calculations were right back then, you should not consider any disc with a height of 55mm or higher, while it will clear everything up to 59 mm height ( I think ) and driving straight; under stress when cornering and high speed suspension flexing, the ball joints will come in contact with the disc. ( of course this will change from setup to set up, ride height suspension mods etc, but when I experienced the issue ( ball joints hitting disc ) I did some more calculations and came up with a safe and very conservative disc height to fix the issue. that's when I upgraded to the Supra NA disc.

This post has been edited by Culpable04: Mar 23, 2015 - 1:44 PM

[njccmd2002]

i have been looking at wilwood hats, and they dont measure in mm, they use hat offset.

the bolt pattern is 5x3.93 thats the closest to 5x100

hat offset i beleive is close would be 0.5 or less, the problem is that there are 2 different ones, with the rotor bolt circle of 8*7.0, and i dont know what the bolt pattern in this rotor is, or would it be compatible with wildwood hats..

looks like there are 8 bolts, but unsure...



http://www.wilwood.com/Hats/HatList.aspx

just search at 5x3.93

[olilaroche]

Does anyone have the part number for the rear st205 caliper bolts? Or the specs of the bolts so I can buy the right sized bolt?

[Tigawoods]

Does anyone have the part number for the rear st205 caliper bolts? Or the specs of the bolts so I can buy the right sized bolt?

I cant tell off the top of my head. They should be the same thread pitch as the stock bolts but a few MM longer

[olilaroche]

Would the supra turbo bolts would be the same? Since its basically the same caliper...

[presure2]

lots of cool info in here guys good work on all parts!
i know daniel added it to the sticky post, but since this is one of the most popular upgrades for the 6gc guys in general, i think it needs to be available right at the top of the forum, with less clicks..lol
facebook age and all..