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 |
Keyword: Armstrong Siddeley Sapphire 346 (1952-58)