Porsche Type 901 (1964)
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Home » Racing Engines » Porshce Type 901

Specifications

Porsche Type 901
Introduced in 1964
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Click here for registry numbers

Dimensions

Cylinders arrangement: flat boxer 6 cyl with 180º included angle
Strokes: 4
Bore x Stroke: 80.0 mm x 66.0 mm, 3.150" x 2.598"
Capacity: 1991 cc, 121.5 ci

Construction materials

silumin alloy crank case. Magnesium alloy crank case for 901/20, 901/21 and 901/22. 124.5mm 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 and 901/22

Cylinder-head

2 x 1 overhead camshafts (SOHC), chain driven
2 valves/cyl. - 12 valves total.
1964-1968: 39mm inlet valve diameter, 35mm exhaust valve diameter.
1969+: 42mm inlet valve diameter, 38mm exhaust valve diameter.
901/20, 901/21 and 901/22: Hollow, sodium-filled exhaust valve

Aspiration

Engine code, aspiration
901/01: 6 x Solex 40 PI carbs
901/05: 2 x Weber 40 IDS 3C-1 carbs
901/09: Bosch Kugelfisher mechanical multipoin fuel injection
901/20: 2 x Weber 46 IDA 3C carbs (parts list)
901/21: Bosch "pulsed injection" D-Jetronic mechanical Fuel Injection system using Kugelfischer PL Injection pump. Click here
901/22: 2 x Weber 46 IDA 3C carbs (parts list)
901/30: 2 x Weber 40 IDS 3C-1 carbs

Ignition

electronic single spark, Bosch coils and Bendix fuel pumps
Magnetti Marelli twin plugs/cylinder for 901/20, 901/21 and 901/22
firing order 1-6-2-4-3-5
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Cooling and lubrication

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

Models used and Output

Year Model, Engine Induction Compression ratio Valves Power Torque
1964 Porsche 911 Type O, 901/01 6 x Solex 40 PI carbs 9.0:1 I39, E35 130 HP (96 kW) @ 6100 rpm 173 Nm (128 ft lbs) @ 4200 rpm
1966 Porsche 911 Type O, 901/05-06 2 x Weber 40 IDS 3C-1 carbs 9.0:1 I39, E35 130 HP (96 kW) @ 6100 rpm 173 Nm (128 ft lbs) @ 4200 rpm
1966 Porsche 911 S type O, 901/02 2 x Weber 40 IDS 3C-1 carbs 9.8:1 I42, E38 158 bhp (118 kW) @ 6600 rpm 179 Nm (132 ft lbs) @ 5200 rpm
1967 Porsche 911 S type A, 901/02-08 2 x Weber 40 IDS 3C-1 carbs 9.8:1 I42, E38 158 bhp (118 kW) @ 6600 rpm 179 Nm (132 ft lbs) @ 5200 rpm
1967 Porsche 911 T type A, 901/03 2 x Weber 40 IDT 3C carbs 8.6:1 I42, E38 110 bhp (81 kW) @ 5800 rpm 157 Nm (116 ft lbs) @ 4200 rpm
1968 Porsche 911 L type A Targa, 901/06 2 x Weber 40 IDS 3C-1 carbs 9.0:1 I39, E35 130 HP (96 kW) @ 6100 rpm 173 Nm (128 ft lbs) @ 4200 rpm
1968 Porsche 911 S type A Targa, 901/08 2 x Weber 40 IDS 3C-1 carbs 9.8:1 I42, E38 158 bhp (118 kW) @ 6600 rpm 179 Nm (132 ft lbs) @ 5200 rpm
1969 Porsche 911 E type B, 901/09 or 901/11 Bosch Kugelfisher MFI 9.1:1 I42, E38 140 bhp (104 kW) @ 6500 rpm 176 Nm (130 ft·lb) @ 4500 rpm
1969 Porsche 911 S type B, 901/10 Bosch Kugelfisher MFI 9.9:1 I45, E39 170 bhp (127 kW) @ 6800 rpm 183 Nm / 135 ft·lb @ 5500 rpm
Racing engines
1964 Porsche 904, 901/20 2 x Weber 46 IDA 3C carbs 10.3:1 I42, E38 200 bhp / 149 KW @ 8000 rpm 190 Nm / 140 ft lbs @ 6000 rpm
1966 Porsche 906, 901/20 2 x Weber 46 IDA 3C carbs 10.3:1 I42, E38 210 bhp / 157 KW @ 8000 rpm 196 Nm / 145 ft lbs @ 6000 rpm
1966 Porsche 906E, 901/21 Bosch Kugelfisher MFI 10.3:1 I42, E38 220 bhp / 164 KW @ 8100 rpm 206 Nm / 152 ft lbs @ 6400 rpm
1966 Porsche 910, 901/21 Bosch Kugelfisher MFI 10.3:1 I42, E38 220 bhp / 164 KW @ 8100 rpm 206 Nm / 152 ft lbs @ 6400 rpm
1967 Porsche 907, 901/21 Bosch Kugelfisher MFI 10.3:1 I42, E38 220 bhp / 164 KW @ 8100 rpm 206 Nm / 152 ft lbs @ 6400 rpm
1967 Porsche 911R, 901/22 2 x Weber 46 IDA 3C carbs 10.3:1 I42, E38 210 bhp / 157 KW @ 8000 rpm 206 Nm / 152 ft lbs @ 6200 rpm
1967 Porsche 911 S, 901/30 2 x Weber 40 IDS 3C-1 carbs 9.9:1 I42, E38 170 HP / 127 kw @ 6800 rpm 195 nm / 144.0 ft lbs @ 5200 rpm
1968 Porsche 911, 901/30 2 x Weber 40 IDS 3C-1 carbs 9.9:1 I42, E38 150 HP / 112 kw @ 6500 rpm
1968 Porsche 911 T/ Porsche 911 S, 901/30 2 x Weber 46 IDA 3C carbs 9.9:1 I42, E38 180 HP / 134 kw @ 6800 rpm 195 nm / 144.0 ft lbs @ 5200 rpm
1970 Porsche 911, 901/30 2 x Weber 46 IDA 3C carbs 9.9:1 I42, E38 180 HP / 134 kw @ 6800 rpm 195 nm / 144.0 ft lbs @ 5200 rpm
1970 Porsche 914/6, 901/22 2 x Weber 46 IDA 3C carbs 10.3:1 I42, E38 210 bhp / 157 KW @ 8000 rpm 206 Nm / 152 ft lbs @ 6200 rpm
1970 Porsche 914/6, 901/30 2 x Weber 46 IDA 3C carbs 10.3:1 I42, E38 200 HP / 8000 rpm 206 Nm / 152 ft lbs @ 6200 rpm
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901/22 engine
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Aluminium block part number 901.101.101.0R
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Magnesium block part number 901.101.102.1R for engine 901/11
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Weber 40 IDS 3C carburetors
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WEBER 46 IDA 3C carburetors

Drawings

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Weber 40 IDS 3C
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Weber 40 IDA 3C
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Solex 40 PI-1
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Injection pump for D-jetronic mechanical pulse injection
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