Porsche 914 Technical Information
1.7 & 1.8 Liter Engines
| Technical Data - 1.7 and 1.8 Liter Engines (Data for 1974 Model 1.8 I Engines in Brackets) | |
| Type | Air cooled, 4-stroke fuel injected engine forming one unit with transmission and final drive; rear mounted |
| Code | W, EA, EB, (EC) |
| Number of cylinders | 4 |
| Cylinder arrangement | Horizontally opposed, 2 cylinders each bank |
| Bore | 90 mm dia. (93 mm dia.) |
| Stroke | 66mm |
| Total displacement | 1679 cc (1795 cc) |
| Compression ratio | 8.2 EB: 7.3 (EC: 7.3) |
| Max. output DIN/SAE net | 80 HP at 4900 rpm/76 at 4900 (EC: 76/72 at 4800) EB: 72/69 at 5000 |
| Max. torque DIN/SAE net | 13.50 mkg at 2700 rpm/99,5 at 3500 (EC: 13/91,0 at 3400) EB: 12.4/87.0 at 2700 10.8 in/sec. at 4900 rpm |
| Mean piston speed | 10.8 m/sec. at 4900 rpm |
| Octane rating | 98 RON, EB: 91 RON (EC: 91 RON) |
| Total weight, dry | approx. 126 kg/277 lb |
| Ignition | Battery ignition |
| Ignition timing | 27° btdc at 3500 rpm (vacuum hose disconnected) (7.5° btdc at 800-900 rpm/ vacuum hoses disconnected) |
| Firing order | 1-4-3-2 |
| Ignition control | Centrifugal and vacuum |
| Dwell angle | 44-50 |
| Spark plugs | M 14x 1.25x 19 |
| Electrode gap | 0.6 mm/0.024 in. |
| Cooling System | Air cooled by radial fan on crankshaft |
| Delivery rate | Approx. 800 L/sec. at 4600 rpm |
| Lubrication | Forced oil lubrication by gear-type pump |
| Oil cooling | Oil cooler in fan air stream |
| Oil filter | Full flow filter |
| Oil pressure gauge | Indicator lamp |
| Oil filling capacities | 3.5 L/3.7 U.S.. gt with filter replacement 3.0 L/3.2 U.S. gt without filter replacement |
| Oil consumption | 0.5-1.0 L/1000 km (0.5-1.0 U.S. gt/620 ml.) |
| Cylinder head | One for each 2 cylinders with cast cooling ribs; aluminum alloy |
| Valve seats | Press fit, sintered steel |
| Valve guides | Press fit, special brass |
| Spark plug threads | Tapped in cylinder head |
| Valve timing | 1 camshaft underneath crankshaft, cam followers, push rods and rocker arms. |
| Valves | 1 intake and 1 exhaust valve per cylinder |
| Exhaust valve | |
| Arrangement | |
| Tappet clearance, intake | 0.15 mm/0.006 in. engine cold |
| Tappet clearance, exhaust | 0.15 mm/0.006 in. engine cold |
| Valve springs | 1 spring per valve |
| Valve timing with 1 mm valve clearance | |
| Intake opens | 12° btdc |
| Intake closes | 42° abdc |
| Exhaust opens | 43° bbdc |
| Exhaust closes | 4° atdc |
| Cylinders | Individual cylinders, special gray cast iron with cooling ribs |
| Distance between centers | 124.5 mm |
| Pistons | Alloy with special inserts |
| Piston pins | Floating, snap rings |
| Piston rings | 2 compression rings 1 oil scraper ring |
| Crankcase | 2-piece divided vertically through crankshaft and camshaft bearings; aluminum alloy |
| Camshaft | Gray cast iron, 3 bearings |
| Camshaft bearings | Thin wall steel shell halves with babbitt bearing surface |
| Camshaft drive | Helical gears |
| Crankshaft | Forged steel, 4 plain bearings |
| Main bearings, 1,3 and 4 | Aluminum shells, lead coated |
| Main bearing | 2 Shells, triple alloy |
| Main bearing journals 1,3 and 4 | 60 mm dia. |
| Main bearing journal 2 | 40 mm dia. |
| Connecting rod bearing journals | 55 mm dia. |
| Flywheel | Forged, one-piece, with starter gear ring |
| Connecting rods | Forged, with I-shaped shank section |
| Connecting rod bearings | Thin wall shell halves, triple alloy |
| Piston pin bushings | Press fit steel bushings with lead/bronze bearing surface |
| Clutch | Diaphragm spring clutch |
| Type | Single disc, dry clutch |
| Total lining surface | 375 cm2 |
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