Austin-Healey 100-Six (BN4) (1956-57)
The Car
Coming soon
The Specs
Below are the technical specifications and any performance numbers we could get.
Engine
Bore & Stroke | 79.4mm x 88.9mm |
Displacement | 2639cc |
Firing order | 1,5,3,6,2,4 |
Oil pressure (hot) | 55 – 60 lb./sq. in |
Fuel Supply
Carburetor | Twin SU H4 |
Choke | 1½ |
Main Jet | 0.090″ |
Needles | AJ |
Valving
Intake tappet clearance |
0.012″ (hot)
|
Exhaust tappet clearance |
0.012″ (hot)
|
Valve-timing indication |
Marked gear teeth
|
Intake valve opens | 5° BTDC (Timing clearance 0.0234″) |
Ignition
Breaker gap | 0.014″ – 0.016″ |
Plug gap | 0.024″ – 0.026″ |
Ignition timing indication | Pulley and pointer |
Ignition timing | 6° BTDC |
Clutch
Clutch type | Borg & Beck 9″ dia |
Clutch linings | Friction area 36.3 x 2 sq. in |
Brakes
Brake type | Girling |
Brake linings | 2½ x 20.4 x (0.167″ – 0.174)” |
Wheel Alignment
Toe-In | 1⁄16″ to 1⁄8″ |
Camber | 1° |
Caster angle | 2° |
King pin angle | 6½° |