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

[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..