Riley 4/sixty-eight (1959)
The Car
Coming soon
The Specs
Below are the technical specifications and any performance numbers we could get.
Engine
| Bore & Stroke | 73.025mm x 88.9mm |
| Displacement |
2639cc
|
| Firing order |
1489
|
| Oil pressure (hot) |
75 lb./sq. in.
|
Fuel Supply
| Carburetor |
Twin SU HD4
|
| Choke |
1½
|
| Main |
0.090″
|
| Standard needle |
FU
|
Valving
| Intake tappet clearance |
0.014″ – 0.015″ (hot)
|
| Exhaust tappet clearance |
0.014″ – 0.015″ (hot)
|
| Valve-timing indication | Timing wheels |
| Intake valve opens | 5° BTDC (TDC at 0.021″ clearance) |
Ignition
| Breaker gap | 0.014″ – 0.016″ |
| Plug gap | 0.024″ – 0.026″ |
| Ignition timing indication |
Pointer and pulley
|
| Ignition timing |
8° BTDC
|
Clutch
| Clutch type | Borg & Beck 8″ dia. |
| Clutch linings | Wound yarn |
Brakes
| Brake type |
Girling drum 2LS (front); single (rear)
|
| Brake linings |
Mintex M14
|
Wheel Alignment
| Toe-In | 1⁄16” to 1⁄8“ |
| Camber | ¾° to 1° |
| Caster angle | 1½° |
| King pin angle | 6½° |
