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Fit disc brakes to your Datsun 1000.
Contents |
Overview
Datsun B10 stub axle is same dimensions as Datsun B110, so the 1200 hub can be bolted on. That means any disc rotors that work with 1200 can be fitted to the 1000. (Datsun calls the it the "knuckle spindle").
The key to a successful swap is in the caliper choice and mounting. Since there are no caliper mounts on a 1000, an adapter bracket must be used. A custom bracket can be fabricated or a Sigma GE bracket can be adapted.
For safety, a tandem (dual circuit) master cylinder is a must, such as a 1200 brake master cylinder
Sigma Swap
Requires 13" wheels
Swap pioneered by asunny and D, photos by LAGWAGON
* B110 disc hub (newer 1200 hubs differ) * Mitsubishi/Chrysler rotor 229mm * PBR caliper * Sigma GE bracket * strongly recommend a dual-system master cylinder B110 or 120Y (non-boosted) master cylinder * Rear wheel cylinders swapped for 11/16" units
Weld the holes in the bracket, and drill new holes to suit the 1000.
ROTOR sizes * Mitsu: 229 mm * Late 120Y: 220 mm * 1200: 212 mm
Bolt modified Sigma bracket to 1000 axle
B110 hub * 1970-1973 1200 w/disc brakes * 1974-1975 120Y w/disc brakes (1976-1978 120Y differs)
early Sigma caliper machined to fit 1200 disc hub (inner circumference lathed by 3mm)
- disc centres machined out to suit the 1200 disc hubs
- 3 holes redrilled on the caliper bracket
- Finish a little of the corner of the new pads for clearance
- Use the standard flexible brake line from the 1000 wagon
PBR CALIPER * CHRYSLER Sigma GE PBR Front Disc 1978-1980 * NISSAN 120Y Sedan P.B.R Front Disc 1977-1979
DISC ROTOR 229 mm RDA 210 RAYBESTOS 9094R $22 Amazon.com * 1971-1980 Dodge Colt USA (with 229mm rotors) * 1976-1980 Plymouth Arrow USA * 1978-1980 Sigma GE (Chrysler Australia) * Mitsubishi Galant GC, GD 1974-1977 * Mitsubishi Lancer LA, LB, LC 1974-1981 Outside Diameter: 229 mm (9.005") Overall Height: 30mm (1.18") Number of Bolts/Holes: 4 Bolt Circle: 86mm (1200 disc hub is 87 mm) Discard Thickness: 11.4mm (0.449") Solid (non-vented)
jempson used 120Y rotors with the sigma calipers.
257mm Brakes
Requires 14" rims
1200 hubs with U12 Pintara 257 x 22 mm vented rotors with Commodore VK Girlock calipers (same as Skyline R31 calipers but without the external fins which limit rim selection).
257mm ROTOR * U12 Pintara * U12 Bluebird 8709-9108 * S13 USA * and more
Photo is of Datsun 1000 suspension with B110 disc brake hubs. A custom steel bracket is fabricated for the caliper mounting.
- use the instructions at S13 Brakes in the 257 mm section
- If you use B110 drum hubs, no machining is needed, and track is not increased.
- If you use B110 disc hubs, the hub must be machined and track is increased.
U12 rotors
CALIPER Commodore VK six-cylinder
- cut a new caliper bracket from 10 or 12mm steel. needs four holes to bolt to the upright and two more holes to mount the caliper
- wheel stud length. the U12 disk slip over the wheel studs before the wheel goes on
259mm Brakes
Use R31 Pintara (rear) 259mm non-vented rotors with matching caliper & factory bracket. Lighter than the 257 vented discs. Slips over the 1000 hub. Reportedly the Pintara caliper is too small for great performance, but the discs are solid.
1986-1990 AUS Pintara wagon & sedan * Nissan 43206-J7000 * DBA 616 (DBA lists them as 260mm) * TRW DF7104 SPECS * Diameter: 259 mm * Thickness: 10.5 mm * Type: solid (non-vented) * Height: 60 mm * Centre hole diameter: 68 mm
Laser Swap
Requires 13" wheels. Requires custom hub.
238 mm ROTOR 1985-1989 Ford Laser KC (Mazda 323 clone) 1988-1989 Mercury Tracer USA/Canada
dattoman_1000 developed this swap
The custom hub
Rotor Height Laser: 31 mm Sigma: 30 mm 1200: 35.6 mm
- For proper balance, change rear wheel cylinder to 1200 rear wheel cylinder (for disc brake 1200)
- recommend 13/16" B310 unit master cylinder, but a 1000/1200 tandem unit can be used for easier braking effort but with more pedal travel
- The bracket is lasercut from 10mm thick steel plate. Drilled and tapped for the 2 caliper bolt mounting holes (10x1.25) and drilled the other holes 4 holes to mount to the spindle. The centre hole is 60mm for the stub axle to pass thru.
- The disc needs to be drilled out to 1/2" diameter mounting holes
- The hubs are machined to keep offset identical to original and accept the standard wheel bearings.
The caliper bracket
238 mm ROTOR x 18 vented $10 Rockauto.com * DBA 930 * PBR DR930 * KELSEY-HAYES JBR317 * ACDELCO 18A306 {#18027906} * BECK/ARNLEY 0802191 * CENTRIC 12145018 * PRONTO BR3146 Discard Thickness 16.002" Nominal Thickness 18.034" Height 31 mm Diameter 238 mm Pattern 94 mm Type Vented
Rotor
CALIPER $20 rockauto.com * Ford Laser KC * Mazda 323 BF non-turbo 1985-1989 cast 18V on cradle and 15 on caliper body
Caliper (right & left differ)
HOSES PBR H1507 with 10x1 banjo bolts and copper washers
PADS: DB406
Bolts (2) 10x1.25 x 80mm long (2) 10x1.25 x 90mm long (4) 10x1.25 x 70mm long +Nylock nuts to suit (4) 10x1.25 x 35mm long (8) 12x1.50 x 25mm long + spring washers
Maddat
Maddat Product No - FBK1000 Datsun 1000 Front Brake Kit
256mm disc, reconditioned Caliper, new rubber lines, mounting brackets and everything you need to bolt this straight on. Will fit under most 14" wheels. $995
5-lug rotors & hubs
4-lug rotors and VN Calipers
Kiwi
Sentra rotors with Wilwood calipers
Hamilton
Gary Hamilton managed to squeeze RX7 4-spots on his 1000 sport sedan which uses 13" wheels, but don't ask me how!
Gary Hamiltons 1000 Coupe
