Specifications

Porsche Type 911/01, 911/02, 911/03 engines
Porsche Type 911/20, 911/21, 911/22 and 911/73 racing engines
Introduced in 1970
Click here
Click here for registry numbers

Dimensions

Cylinders arrangement: Boxer 'flat' 6 cylinders, or V6 with 180º included angle, and opposed pistons arrangement
Strokes: 4
Fuel: petrol

Basic version

All engines codes 911/01, 911/02, 911/03
Bore x Stroke: 84.0 mm x 66.0 mm, 3.307" x 2.598"
Capacity: 2194.53 cc, 134 ci
Torque settings

Racing versions

Engine Code	Bore x Stroke	Capacity
911/20	85.0 mm x 66.0 mm, 3.346" x 2.598"	2247 cc, 137.1 ci
911/21	87.5 mm x 66.0 mm, 3.445" x 2.598"	2380 cc, 145.2 ci
911/22	85.0 mm x 66.0 mm, 3.346" x 2.598"	2247 cc, 137.1 ci
911/73	89.0 mm x 66.0 mm, 3.504" x 2.598"	2464 cc, 150.4 ci

Construction materials

silumin alloy crank case. Magnesium alloy crank case for 911/20, 911/21, 911/22 and 911/73. 118mm bore spacing, with cast iron cylinder liners coated with fins for air cooling
Aluminium alloy head with hemi combustion chamber
forged steel crankshaft with 8 plain main bearings 57mm diameter, big end journal diameter 57mm
steel connecting rods, 130mm distance center to center, 61mm big end bearing diameter
titanium connecting rods for 901/20, 901/21, 911/22 and 911/73

Cylinder-head

2 x 1 overhead camshafts (SOHC), chain driven
2 valves/cyl. - 12 valves total. 46mm inlet valve diameter, 40mm exhaust valve diameter.
901/20, 901/21, 911/22 and 911/73: Hollow, sodium-filled exhaust valve

Typ 906 camshaft, center oiling, three bearing:
906 Lift I/E: 11.73/10.24; Duration I/E (deg crank) 281/251; Lobe Center (deg camshaft) 95; Intake Valve Overlap 6.7*-6.9*

Aspiration

Bosch "pulsed injection" D-Jetronic mechanical Fuel Injection system using Kugelfischer PL Injection pump. Click here. Injection pump Calibration sheets
2 x Weber 40 IDT 3C carbs
2 x Weber 46 IDA 3C carbs (parts list)

Ignition

BHKZ Bosch electonic ignition
single Bosch X 270 P 21 spark plug, Bosch coils and Bendix fuel pumps
850 W alternator
Magnetti Marelli twin plugs/cylinder for 911/20, 911/21, 911/22 and 911/73
firing order 1-6-2-4-3-5

Source

Cooling and lubrication

aircooled
Dry sump with 1 oil cooler. 11 lt oil capacity

Models used and Output

Year	Model, Engine	Induction	Compression ratio	Power	Torque
1970	Porsche 911 E type D, 911/01	Bosch Kugelfisher MFI	9.1:1	153 bhp (114 kW) @ 6200 rpm	191 Nm (141 ft·lb) @ 4500 rpm
1970	Porsche 911 S Type C/D, 911/02	Bosch Kugelfisher MFI	9.8:1	177 BHP (130 KW) @ 6500 RPM	199 Nm (147 Ft-Lbs) @ 5200 rpm
1970	Porsche 911 T Type D, 911/03	2 x Weber 40 IDT 3C carbs	8.6:1	123 bhp (92 kW) @ 5800 rpm	176 Nm (130 ft·lb) @ 4200 rpm
Racing engines
1970	Porsche 911 S/T, 911/20	Bosch Kugelfisher MFI	10.3:1	230 hp @ 7800 rpm	170 lb/ft @ 6200 rpm
1970	Porsche 911 S/T, 911/22	2 x Weber 46 IDA 3C carbs	10.3:1	230 hp @ 7800 rpm	170 lb/ft @ 6200 rpm
1971	Porsche 911 S/T, 911/21	Bosch Kugelfisher MFI	10.3:1	250 hp @ 7800 rpm	186 lb/ft @ 6200 rpm
1972	Porsche 911 S/T, 911/73	Bosch Kugelfisher MFI	10.3:1	275hp @ 8000 rpm	192 lb/ft @ 5300 rpm