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S13 (1989-1993 Silvia, 180SX, 200SX) brakes can be modified for use on Datsun 1200 struts. They are large-diameter vented discs, so good for street and track use both. The 250 mm rotor fits under 14" wheels, while the 280 mm rotor requires 15" wheels. Alternatively the 257 mm rotor is a great alternative and also available from many Nissan vehicles besides the S13.
Contents |
Overview
The reason to use S13 instead of S14 is that S13 is four-stud rotors. Some S14 have five-bolt rotors on the turbo models, yet the brakes are not any bigger.
KB110 Brakes: * tiny single-pot twin-piston caliper * tiny non-ventilated disc
S13 Brakes: * large single-pot caliper * large ventilated disc
S13 came 4-bolt with various rotor sizes:
FRONT 250mm diameter Front 251mm diameter Front USA Non-ABS 257mm diameter Front EUROPE late + USA ABS 280mm diameter 1991-1992 Turbo
REAR 258mm diameter Rear
S13 brakes onto b110 struts discussion in Main Forum
once again the s13 disk conversion Discussion
Rim Size
14" wheels fit the 250mm and 257mm brakes. The 280mm brakes use 15" or 16" wheels.
Certain 13" rims will fit 250mm brakes, but most will not.
13" alloy rim over 250mm brakes
Machining
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 of rotor from 68 mm to 70 mm
- Machine outer diameter of hub down to clear the inside of rotor
- Buy or fabricate caliper adapter bracket
1200 Drum Hubs
You can also use early 1200 (B110) drum hubs which require no machining. The downside is the have a 5mm difference in offset, so either use custom brackets or a 5mm spacer.
Longer Wheel Studs
Since the S13 rotor floats over the 1200 hub, it will require longer wheel studs. Swap the S13 studs to the 1200 hubs, or swap in any compatible Wheel Studs.
Caliper Adapter Bracket
The calipers for 250mm & 280mm rotor use the same bolt spacing (reportedly 100mm or 103mm), so either caliper will work with an appropriate bracket adapter (obviously the spacing will need to vary). The hubs and spindles are the same regardless of brake size. The caliper bracket is much taller on the 280mm brakes -- and wider too to accomodate the wider brake pads.
S13 Brakes on 120Y Disc-brake Struts
NOTE: 120Y is A12-powered B210. It uses different struts than A14-powered B210. 120Y uses the same strut as B110.
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?
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 also 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 Brakes 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
Rotor
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 [250 mm] 40206-35F01 SR20DE.2WS+CA18DE+CA18DET 8805-9310 <> 40206-35F02 [280 mm] 40206-55F01 2WS.KS+4WS 9308- <> 40206-55F03,40206-7J101,40206-73L01,40206-73L02
S13 EUROPE 200SX 0988-1293 (CA18DET) [257 mm] 40206-71E01/40206-71E02 0988-0991 [280 mm] 40206-55F01/40206-55F03 0991-1293
S13 USA 240SX 0788-0993 [251 mm (9.9 inch), non-ABS] 40206-40F01 0788-0891, 40206-40F02 0891-0993 [257 mm (10.1 inch), ABS] 40206-71E01 1188-0993 OPTION F/ANTI SKID CONT-4WH <> 40206-71E02,40206-71E05,40206-71E06,40206-71E07
Caliper
JAPAN caliper [f/250mm rotor] 41001-35F00,41001-35F01 [f/280mm rotor] 41001-73L01
EUROPE caliper [f/257mm rotor] 41001-44F00,41001-44F01 -0991 [f/280mm rotor] 41001-73L01 0991-
USA caliper [f/251mm rotor] 41001-40F00,41001-40F01 (non-ABS) [f/257mm rotor] 41001-44F00,41001-44F01 (ABS)
Interchange
S13 vs S14
JAPAN S13 used 250 or 280 mm rotors S14 used 251 or 275 mm rotors on base SR20DE 2WS models. 5-lug on others. * 251mm 40206-40F03 9310-9606 40206-40F02 * 257mm 40206-71E07 9606-9812 40206-71E06 EUROPE S13 used 257 or 280 mm rotors S14 used 5-lug rotors
USA S13 used 251 or 257 mm rotors S14 used same for STD models. SE models used 5-lug rotors
250 mm
40206-35F01, 40206-35F02 ROTOR
JAPAN S13 Silvia RS13 180SX
250mm pads are same as * SUZUKI SWIFT Hatchback (EA, MA) 8903-0312 Sedan (AH, AJ) 8903-0105
251 mm
40206-40F01/40206-40F02
JAPAN * A31 RB20E * C33 CA18I + RB20E + RD28 * R32 CA18I
USA * S13 non-ABS * S14 4-lug 0294-0796
257 mm
40206-71E01,40206-71E02,40206-71E05,40206-71E06,40206-71E07
JAPAN S14 9606- 2WS.SR20DE M11 Prairie 8809-9508 C22 Vanette 8809-9403 C33 Laurel 8812-9212 C34 Laurel 9301-9705 P10/W10 Primera 9002-9611 WP11 9709-0011 R32 Skyline 8905-9411 A31 Cefiro 8809-9406 U12 Bluebird 8709-9108 U13 Bluebird 9109-9511 U14 Bluebird 9601-
USA S13 240SX 1188-0993 with ABS S14 240SX 0796-0698 STD (except SE) M11 Axxess 0189-0394 U12 Stanza 0789-0692
280 mm
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
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 inside diameter (over hub): 144 Caliper: Akebono
280 mm Height: 49 mm Thickness: 22 mm nominal Hub Reg: 68 mm Bolt Circle: 4x114.3 mm inside diameter (over hub): 143.75 Caliper: Sumitomo
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
[for 250 mm rotor]
AY040-NS926, AY040-NS825, AY040-NS009
Sangsin SP1183
[for 280mm rotor]
AY040-NS929
Bosch 0986493450
[for 251 mm rotor]
41060-40F90,41060-40F91,41060-40F92,41060-40F92,D106M-40F90,D106M-40F94,D106M-40F25
Centric 102.04220
[for 257 mm rotor]
41060-G8190,D106M-G8190
Centric 301.07000
USA S13 251 mm rotor (non-ABS) * caliper: 54mm bore (2.122") * pads: 121x50.4 41060-G8190 D422 257 mm rotor (ABS) * caliper: 57mm bore (2.25") * pads: 137x54.3 41060-40F90 D449,D462,D469,D485,D700,D747,DD887 REAR 258 mm rotor * caliper: 33mm bore (1-5/16") * pads: 85.3x42.9 D230,D231,D232,D272 Use with wheels: 6JJx15 +40 4Tx15 +40 4Tx16 +35
JAPAN SILVIA 250 mm rotor * Caliper: 48mm bore * pad: 115x47.6 AY040-NS926 * 5Jx14 wheel 280 mm rotor * Caliper: 54mm bore * pad: 137.2x53 AY040-NS929 * 6JJx15 +40 wheel
EUROPE 200SX 257 mm rotor to 09/1991 * caliper: 54mm bore * pad: 137x54.6 280 mm rotor from 10/1991 * caliper: 54mm bore * pad: 137.2x53
S13 brakes on 1200 Drum Strut
Chassis_slappin_1200 brake conversion
1st try: Bolt-on S13 250mm rotors
2nd try: Slip-on S13 rotor
