S13 Brakes

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S13 (1989-1993 Silvia, 180SX, 200SX) brakes can be modified for use on Datsun 1200 struts.

Overview

S13 came 4-bolt with various rotor sizes:

FRONT
250mm diameter Front 
251mm diameter Front Non-ABS USA
257mm diameter Front ABS USA
280mm diameter 1991-1992 Turbo

REAR 
258mm diameter Rear

S13 250mm rotor & caliper on 1200 disc brake struts requires some machining. But it gains ventilated rotors suitable for racing applications.

• Machine hub registration diameter from 70mm down to 68 mm
• Machine outer diameter of hub down to clear the inside of rotor
• Buy or fabricate caliper adapter bracket

Discussion in Main Forum

The calipers for 250mm & 280mm rotor use the same bolt spacing, so either will work with the caliper bracket adapter.

S13 Brakes on 120Y Disc-brake Struts

NOTE: 120Y is A12-powered B210. It uses different struts than A14-powered B210.

The Silvia S13, S14 centre bore is 68mm and the 1200 hub is 70mm at the disk seat. But the Silvia disk has a huge backspacing compared to the 1200 disk. Perhaps 2mm need to be machined off? custom adaptor plates for the caliper are also needed.

You need an adaptor plate for the the calipers.

You may need to swap the struts right-to-left and left-to-right to clear the steering arms. Also, mount the calipers INBOARD for better weight distribution.

'78 120y struts discs and calipers cos they're an aussie assembled PBR product. i aslo swapped the struts left to right to clear the steering arms once i put silvia rotors and calipers in place. low1000

Optional: use Hilux 4-pot calipers, which only involve the elongation of one bolt hole with a round file and then bolt straight up over 180SX discs. These are similar to MK63 calipers but are cast iron instead of alloy.

Wise words from Bundy351: I am running 120y struts in my 1200 ute. On these struts I have a Kev Rowley Brake adaptor plate (about $100 for the pair) Rotors, calipers, calliper bolts (2 per caliper) and wheel studs from a 1989 nissan silvia. You also need the flexi brake hose (mine came off a 1995 corolla cause thats all I could find). Very simple conversion.

• MACHINE THE OUTER DIAMETER OF THE HUBS DOWN SO THE ROTOR WILL SLIDE OVER IT (150mm FROM MEMORY BUT I HAVE HAD ALLOT OF RUM SINCE I DID CONVERSION) PREFERABLY USE A LATHE BUT YOU CAN USE A GRINDER.
• KNOCK OUT 120Y STUDS AND BANG IN SILVIA ONES
• CUT A 10mm SLOT IN THE HOSE MOUNT ON THE STRUT TUBE (LITTLE METAL TAB THE BRAKE HOSE SITS IN)
• BOLT BRACKETS TO STRUTS
• SLIDE ROTORS ON
• BOLT CALIPERS ON WITH PADS
• CONNECT HOSES
• BLEED
• RE-FIT WHEELS
• TEST DRIVE

WHERE TO CUT THE 10mm SLOT

WHAT THE BRACKET LOOKS LIKE

FINISHED PRODUCT

Part Numbers

RS13 Japan 180SX 8903-9812
[250 mm] 40206-35F01 8903-9101 CA18DET
[280 mm] 40206-55F03 9101-9812 SR20DE+SR20DET <> 40206-7J101,40206-73L01,40206-73L02

S13 Japan Silvia 8805-9310
40206-35F01 CA18DE+CA18DET 8805-9310 <> 40206-35F02 [250 mm]
40206-55F01 2WS.KS+4WS 9308- <> 40206-55F03,40206-7J101,40206-73L01,40206-73L02 [280 mm]

S13 USA 240SX 0788-0993
[251 mm (9.9 inch), non-ABS]
40206-40F01 0788-0891 KA24E+KA24DE
40206-40F02 0891-0993 KA24E+KA24DE 
[257 mm (10.1 inch), ABS]
40206-71E01 1188-0993 OPTION F/ANTI SKID CONT-4WH <> 40206-71E02,40206-71E05,40206-71E06,40206-71E07

280mm
40206-7J101
 JAPAN
  * B15 0004- SR16VE
  * P11 0004- SR20VE, 4WD.SR20DE.MT, SR20DE.AT.F4
  * U14 0004- SR20VE
  * WP11 0004- SR20DE.MT.FT + SR20DE.AT.F4
  * WP11 0004- SR20DE.AT.CVT + SR20VE
40206-55F03
 JAPAN
  * P11 SR20VE, OPTION SR20DE
  * RS13, S13 some
  * U14 SR20VE
  * WP11 some
  * A31 4WD.IRS.RB20DT, OPTION.2WD.IRS+2WD.HICAS.RB20DT.AT.FR, OPTION.RB20
  * C33 some
  * C34 some
  * R32 some
 USA
  * U13U 0692-0794 KA24DE.SE, OPTION.GXE, OPTION.AT
  * U13U 0794- KA24DE
 
251mm
40206-40F01/40206-40F02
 JAPAN
  * A31 RB20E
  * C33 CA18I + RB20E + RD28
  * R32 CA18I
 USA
  * S13

S13 Japan 
40206-35F01 ROTOR-DISC BRAKE, FRONT <> 40206-35F02,40206-35F03
  41001-35F00 CALIPER (RH) <> 41001-35F01 
  * 8805-9101 CA18DE+CA18DET
    AY040-NS926 PAD KIT <> AY040-NS825
  * 9101-9310 2WS.SR20DE
    AY040-NS926 PAD KIT <> AY040-NS009
40206-73L01 ROTOR-DISC BRAKE, FRONT <> 40206-73L02,40206-55F01,40206-55F03,40206-7J101
  41001-73L01 CALIPER (RH)
  * 9101-9310 2WS.KS+4WS
    AY040-NS929 PAD KIT
40206-71E01,40206-71E02,40206-71E05,40206-71E06,40206-71E07
* ABS/ANTI-SKID

Specifications

250 mm
Thickness: 18 mm nominal
Hub Reg: 68 mm
Bolt Circle: 4x114.3 mm

251 mm
Height: 49.2 mm
Thickness: 20 mm nominal
Hub Reg: 68 mm
Bolt Size 12.75 mm
Bolt Circle: 4x114.3 mm

257 mm
Height: 49 mm
Thickness: 22 mm nominal
Hub Reg: 68 mm
Bolt Size 12.6 mm
Bolt Circle: 4x114.3 mm

280 mm
Height: 49 mm
Thickness: 22 mm nominal
Hub Reg: 68 mm
Bolt Circle: 4x114.3 mm

258 mm REAR
Height: 46.5 mm
Thickness: 9 mm nominal
Hub Reg: 68 mm
Bolt Size 12.75 mm
Bolt Circle: 4x114.3 mm