Home » Racing Engines » Porsche 369/506
Specifications
Porsche B4 1100 type 369, 1300 type 506
Introduced in 1948 as 1100 and in 1951 as 1300
Dimensions
Cylinders arrangement: Boxer 'flat' 4 cylinders, or V4 with 180ยบ included angle, and opposed pistons
Strokes: 4
Fuel: petrol
| Type | Bore x Stroke | Capacity |
|---|---|---|
| 369 | 73.5 mm x 64.0 mm, 2.89" x 2.52" | 1086 cc, 66.1 ci |
| 506 | 80.0 mm x 64.0 mm, 3.15" x 2.52" | 1286 cc, 78.6ci |
Construction materials
magnesium crankcase, aluminium finned cylinders with nicasil coatings, aluminium alloy finned cylinderhead
Steel crankshaft with 3 main bearings
Steel connecting rod, 136 mm distance center to center, 50 mm big end hole diameter, 19.75mm big end width, 22 mm small end hole diameter, 21mm small end width
JE forged aluminium high dome Pistons, cast iron rings
Cylinder-head
side camshaft with overhead valves (OHV), gear driven
2 valves per cylinder - 8 valves total
Aspiration
2 x Solex 32 PBI Carburetors
Ignition
Firing order 1 - 4 - 3- 2battery, 6V, 84 Ah, 1953: 75 Ah
Source
Cooling and lubrication
air cooled
Wet sump with oil cooler, 3.5 lt oil capacity
Models used and Output
| Year | Model | Induction | Compression ratio | Power | Torque |
|---|---|---|---|---|---|
| 1948 | Porsche 356 Type 369 |
2 x Solex 32 PBI Carbs | 7.0:1 | 40 bhp / 29.5 kW @ 4000 rpm | 71.6 Nm / 53 ft lbs @ 3300 rpm |
| 1951 | Porsche 356 SL Type 369 |
2 x Solex 32 PBI Carbs | 7.0:1 | 46 bhp / 34 kW | |
| 1951 | Porsche 356 1300 Type 506 |
2 x Solex 32 PBI Carbs | 6.5:1 | 44 bhp / 32.5 kW @ 4200 rpm | 81.4 Nm / 60 ft lbs @ 2500 rpm |
| 1953 | Porsche 356 1300 Type 506 |
2 x Solex 32 PBI Carbs | 6.5:1 | 44 bhp / 32.5 kW @ 4400 rpm | 83.4 Nm / 62 ft lbs @ 2500 rpm |