These are notes that I’ve taken for the big brake kit (BBK) setup on my 2015 Scion FR-S. I took these notes to help future-Guyon when some component inevitably needs replacing.
RR-Racing Development Thread on FT86Club
Calipers
| |
Front |
Rear |
| Make |
Wilwood |
Wilwood |
| Model |
Forged Superlite 6 Radial Mount |
Powerlite Radial Mount |
| Part # |
120-13236 (left), 120-13235 (right) |
120-8728 (both sides) |
| Finish |
Black anodized |
Black anodized |
| Material |
Forged Aluminum |
Forged Aluminum |
| Weight (lbs) |
5.4 |
2.8 |
| Piston # |
6 |
4 |
| Piston Type |
Stainless |
Stainless |
| Piston 1 Bore (in) |
1.62 |
1.25 |
| Piston 2 Bore (in) |
1.12 |
1.25 |
| Piston 3 Bore (in) |
1.12 |
|
| Total Piston Area (in²) |
4.04 |
2.46 |
| Dust Boot |
No |
No |
| Rotor Width (in) |
1.25 |
.86 |
| Maximum Rotor Width (in) |
1.35 |
.86 |
| Minimum Rotor Width (in) |
1.15 |
.79 |
| Maximum Rotor Diameter (in) |
14.00 |
11.00 |
| Minimum Rotor Diameter (in) |
11.75 |
9.45 |
| Mount Type |
Radial |
Radial |
| Mount Center (in) |
5.98 |
5.08 |
| Mount Hole Size (in) |
0.39 |
0.40 |
| Mount Height (in) |
1.63 |
1.56 |
| Inlet Thread Size |
1.8/27-NPT |
1.8/27-NPT |
| UPC |
889545003116 (left), 889545003109 (right) |
889545006346 |
Pads
| |
Front |
Rear |
| Pattern |
7420 |
7912 (must be modified - cut on top) |
| Pad used |
EBC Yellowstuff DP4037/2R |
EBC Yellowstuff DP4057R |
| Pad Area (in²) |
8.2 |
5 |
| Pad Volume (in³) |
4.9 |
1.8 |
| Pad Depth (in, mm) |
.80, 20.3 |
.49, 12.4 |
| Pad Width (in, mm) |
4.74, 120.4 |
3.13, 79.5 |
| Pad Height (in, mm) |
2.43, 61.7 |
2.31, 58.6 |
Rotors
These are the details of the rotors that came with the kits from RR-Racing.
| |
Front |
Rear |
| Diameter |
326mm (12.8”) |
315mm (12.4”) |
| Thickness |
30mm (1.20”) |
20.8mm (0.82”) |
| Material |
Cast Iron, high carbon |
Cast Iron, high carbon |
| Coating |
Hat Coating E-Coating – black high temperature coating |
Corrosion resistant electroplating |
| Bracket Material |
Aerospace Grade Billet Aluminum |
Aerospace Grade Billet Aluminum |
| Compatability |
2004 WRX STI OR a 2017+ 86/BRZ with the performance package. Both have 5x100 lug pattern. |
2017+ 86/BRZ with the performance package (Part #26700CA000) but are not from a 2004 STI - they are too wide. The correct rotors are from a 2008-2017 STI. However, if you purchase regular brand 08-17 STI rotors the bolt pattern will be wrong (5x114.3). DBA dual drills those rotors for 5x100 applications. DBA Part# 42656S-10. |
