Humber Super Snipe Mark Iv (1953-57)
The Car
Coming soon
The Specs
Below are the technical specifications and any performance numbers we could get.
Engine
| Bore & Stroke | 88.9mm x 111mm |
| Displacement |
4139cc
|
| Firing order | 1,5,3,6,2,4 |
| Oil pressure (hot) |
45 – 50 lb./sq. in. at 30-45 mph
|
Fuel Supply
| Carburetor | Stromberg DBVA42 |
| Venturi | 1¼ |
| Main | L2080 |
| Metering | 0.065 |
| By-pass | 0.056 |
| Idle tube | 64 x 75 |
| H/S bleed | 52 |
| Pump | 68 |
Valving
| Intake tappet clearance |
0.010″ (cold)
|
| Exhaust tappet clearance |
0.012″ (cold)
|
| Valve-timing indication | Marks on timing gears |
| Intake valve opens |
15° BTDC
|
Ignition
| Breaker gap | 0.016″ |
| Plug gap | 0.028″ – 0.032″ |
| Ignition timing indication |
Fan pulley and timing cover
|
| Ignition timing |
5° – 7° BTDC (premium)
|
Clutch
| Clutch type | Borg & Beck Hydraulic Operation |
| Clutch linings |
Borglite
|
Brakes
| Brake type |
Lockheed Hydraulic
|
| Brake linings |
Mintex M11
|
Wheel Alignment
| Toe-In | 1⁄8” (Note: Toe-in and steering angles with car laden to gap gauges) |
| Camber | +0° 45′ |
| Caster angle | 1° 5′ |
| King pin angle |
5° 15′
|
