Armstrong Siddeley STar Sapphire (1959)
The Car
Coming soon
The Specs
Below are the technical specifications and any performance numbers we could get.
Engine
| Bore & Stroke | 97mm x 90mm |
| Displacement |
3990cc
|
| Firing order | 1,5,3,6,2,4 |
| Oil pressure (hot) | 60 lb./sq. in. |
Fuel Supply
| Carburetor | Twin Stromberg DIV 42 (alt. Zenith 42WIA) |
| Choke |
1¼” (alt. Zenith=32mm)
|
| Main |
0.065″ (alt. Zenith=157)
|
| By-Pass |
0.060″ (alt. Zenith=120)
|
| Main Discharge |
L1808 (alt. Zenith=N/A)
|
| High-speed bleed |
0.065″ (alt. Zenith=N/A)
|
| Pump |
0.070″ (alt. Zenith=N/A)
|
Valving
| Intake tappet clearance |
0.008″ (hot)
|
| Exhaust tappet clearance |
0.008″(hot
|
| Valve-timing indication | Timing wheels |
| Intake valve opens | 8° BTDC at 0.008″ clearance |
Ignition
| Breaker gap | 0.015″ |
| Plug gap | 0.028″ |
| Ignition timing indication | Peg and hole in flywheel |
| Ignition timing |
3°BTDC
|
Clutch
| Clutch type | Hydraulic torque converter |
| Clutch linings |
Brakes
| Brake type |
Girling disc (front), drum (rear) with Vac-hydro
|
| Brake linings |
Ferodo DS5 (front); MSI (rear)
|
Wheel Alignment
| Toe-In | 0″ to 1⁄16“ |
| Camber | 1° ± ¼° unladen |
| Caster angle | ½° ± ¼° unladen’ |
| King pin angle | 5.5° unladen |
