Armstrong Siddeley Sapphire 346 (1952-58)
The Car
Coming soon
The Specs
Below are the technical specifications and any performance numbers we could get.
Engine
| Bore & Stroke | 90mm x 90mm |
| Displacement |
3435.3cc
|
| Firing order | 1,5,3,6,2,4 |
| Oil pressure (hot) | 40 lb./sq. in. |
Fuel Supply
| Carburetor | Stromberg DI 36 |
| Choke Venturi |
13⁄16“
|
| Metering | 0.060″ Note:Twin carbs, setting as single except as single except metering jet, 0.058″ When oil bath air cleaner is fitted to single-carb, cars, metering jet is 0.057″ |
| Main Dis. Jet L | 2111 |
| Idle Dis. Top | 0.060 |
| Idle Dis. Bottom | 0.068 |
| High-speed bleed | 0.068 |
| Idle tube bottom | 0.068 |
| Idle tube top | 0.075 |
| Pump Dis. Jet | 0.070 |
Valving
| Intake tappet clearance |
0.006″ (hot)
|
| Exhaust tappet clearance |
0.006″ (hot)
|
| Valve-timing indication | Camshaft and crankshaft chain sprockets |
| Intake valve opens | 8° BTDC Rockers at 0.016″ (cold) |
Ignition
| Breaker gap | 0.014″ – 0.016″ |
| Plug gap | 0.028″ – 0.033″ |
| Ignition timing indication | Marks on flywheel and fan pulley |
| Ignition timing |
5°BTDC
|
Clutch
| Clutch type | Single Dry Plate (Automatic gearbox, fluid coupling) |
| Clutch linings |
Brakes
| Brake type |
Girling hydraulic
(With Vac-Hydro unit after chassis 343751) |
| Brake linings |
2LS (front)
|
Wheel Alignment
| Toe-In | 3⁄16“ |
| Camber | 2° straight ahead |
| Caster angle | Laden 1° straight ahead |
| King pin angle | 5.5° straight ahead |
