Overview[]
The Porsche 550 was a racing sports car produced by Porsche from 1953 to 1956. In that time only 90 Porsche 550s were produced, but it quickly established dominance in the 1.1- and 1.5- liter classes. The Porsche 550 is a mid-engine car with an air-cooled four-cylinder engine, following the precedent of the 1948 Porsche 356/1 prototype designed by Ferry Porsche. The mid-engine racing design was further developed with Porsche's 718 model; its advantages led to it becoming the dominant design for top-level racing cars by the mid-1960s.
Source: Wikipedia
Specifications[]
| Engine | |
|---|---|
| Design: | Four cylinder air cooled, horizontal opposed, 4 overhead camshafts |
|
Power: |
Approximately 110 PS (81 kW) at 6200 rpm |
| Bore: | 3.35 in (85mm) |
| Stroke: | 2.59 in (66mm) |
| Piston Displacement: | 1,498 cc (91.4 cu in) |
| Compression ratio: | 9.5:1 |
| Crankcase: | Aluminium |
| Cylinders: | Aluminum hard chromed walls |
| Cylinder head: | Aluminium |
| Valves per cylinder: | 1 intake, 1 exhaust |
| Valve operation: | 4 camshafts driven by 2 vertical shafts. |
| Crankshaft: | Full roller bearing, built up |
| Pistons: | Aluminium |
| Air blower drive: | V-belt, crankshaft to generator shaft |
| Crankshaft-blower ratio: | 1:1 |
| Air volume: | 1100 ltr/sec at 6200 RPM |
| Engine lubrication: | Dry sump, with oil cooler and oil filter in main current |
| Firing Order: | 1-4-3-2 |
| Distributor Drive: | Camshaft |
| Spark Plugs : | Temperature valve 260 - 280 |
| Carburetors : | Solex 40 PJJ or Weber 40 DCM |
| Muffler | 2 mufflers leading into 1 exhaust pipe |
| Clutch : | Fichtel & Sachs, K 12 Porsche Special |
| Transmission : | 4 forward speeds, helical gears, synchronised, 1 reverse |