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Subaru EA engine

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Subaru EA engine
Overview
ManufacturerSubaru
Production1966–94
Layout
Configurationflat-4 petrol engine
ValvetrainOHV/SOHC
Combustion
Fuel typePetrol/gasoline
Cooling systemwater
Chronology
SuccessorSubaru EJ engine

The Subaru EA engine is a series of automobile internal combustion engines manufactured by Subaru, a division of Fuji Heavy Industries. All EA series engines are of a flat-4 design, and have always been water cooled.

The EA series engines have aluminum heads with aluminum blocks. Each cylinder has two valves, one for exhaust and one for intake. They came in either an OHV pushrod or SOHC configuration.

Subaru produced the EA series from 1966 to 1994, and were found in the Subaru FF-1 and the Subaru Leone.

EA-52

The Subaru EA-52 engine was produced from 1966 until 1970.

Specifications

  • Displacement: 977.2 cc
  • Bore: 72 mm
  • Stroke: 60 mm
  • Compression Ratio: 9.0:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 55 bhp (41 kW; 56 PS) at 6,000 rpm
  • Torque: 57 lb⋅ft (77 N⋅m) at 3,200 rpm
Found on

EA-53

The Subaru EA-53 was used in the 1967 Subaru 1000 Sports Sedan, sold in Japan. It used twin carburetors. This engine was used in the September 1968 Japan Alpine Rally which the car won in the 1000cc engine class.

Specifications

  • Displacement: 977.2 cc
  • Bore: 72 mm
  • Stroke: 60 mm
  • Compression Ratio: 10:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 67 PS (49 kW; 66 bhp) at 6,600 rpm
  • Torque: 8.2 kg⋅m (80 N⋅m; 59 lb⋅ft) at 4,600 rpm

EA-61

Subaru EA61 1.1L

The Subaru EA-61 engine was produced from 1969 to 1972. The Japanese-spec Subaru FF-1 Sport Sedan and the FF-1 Super Touring sedan used twin carburetors, with the engine designation EA-61S. It was sold in the United States only for the 1971 model year.[1]

Specifications

  • Displacement: 1,088 cc
  • Bore: 76 mm
  • Stroke: 60 mm
  • Compression Ratio: 8.5:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 61 bhp (45 kW; 62 PS) at 5,600 rpm
  • Torque: 65 lb⋅ft (88 N⋅m) at 4,000 rpm
Found on

EA-62

The Subaru EA-62 engine was produced from 1971 to 1972. It is the only EA- engine with rear-facing exhaust ports.

Specifications

  • Displacement: 1267.5 cc
  • Bore: 82 mm
  • Stroke: 60 mm
  • Compression Ratio: 9.0:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 80 bhp (60 kW; 81 PS) at 6,400 rpm
  • Torque: 73 lb⋅ft (99 N⋅m) at 4,000 rpm
Found on

EA-62S

This engine used twin carburetors from Zenith-Stromberg.

  • Displacement: 1267.5 cc
  • Bore: 82 mm
  • Stroke: 60 mm
  • Compression Ratio: 10.0:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 93 PS (68 kW; 92 bhp) at 7,000 rpm
  • Torque: 10.5 kg⋅m (103 N⋅m; 76 lb⋅ft) at 5,000 rpm
Found on

EA-63

The Subaru EA-63 engine was produced from 1973 to 1979, although it stopped being used in US-market cars in 1976.

Specifications

  • Displacement: 1,361 cc
  • Bore: 85 mm
  • Stroke: 60 mm
  • Compression Ratio: 8.5:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 58 bhp (43 kW; 59 PS) at 5,200 rpm
72 PS (53 kW) at 6,000 rpm (JDM, emissions cleaned)[2]
78 PS (57 kW) at 6,000 rpm (JDM, no emissions equipment)[2]
  • Torque: 68 lb⋅ft (92 N⋅m) at 2,400 rpm
10.2 kg⋅m (100 N⋅m; 74 lb⋅ft) at 3,600 rpm (JDM, emissions cleaned)[2]
10.5 kg⋅m (103 N⋅m; 76 lb⋅ft) at 4,000 rpm (JDM, no emissions equipment)[2]
Found on

EA-64

The Subaru EA-64 engine was produced from 1973 to 1979. The engine disappeared from the sedan catalogs in September 1975, as the new emissions regulations would simply make the car too slow. As commercial vehicles didn't have to meet the new stricter regulations, it continued to be available in the Van 1200 Standard until the end of production of the first generation Leone in 1979.

Specifications

  • Displacement: 1,176 cc
  • Bore: 79 mm
  • Stroke: 60 mm
  • Compression Ratio: 9.0:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 68 PS (50 kW) [2]
  • Torque: 9.5 kg⋅m (93 N⋅m; 69 lb⋅ft) at 3,600 rpm
Found on

EA-65

The Subaru EA-65 engine was produced from 1979 to 1994.

Specifications

  • Displacement: 1,298 cc
  • Bore: 83 mm
  • Stroke: 60 mm
  • Compression Ratio: 9.0:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 65 bhp (48 kW; 66 PS) at 5,600 rpm
  • Torque: 85 lb⋅ft (115 N⋅m) at 3,200 rpm
Found on
  • 1979-1994 Subaru Leone for Japanese domestic market, Europe, and Latin America.

EA-71

The Subaru EA-71 engine was produced from 1976 to 1994, and was a redesign of the EA-63 block. Sales in the US ended in 1987.

Subaru EA-71 Engine

Specifications

  • Displacement: 1595 cc
  • Bore: 92 mm
  • Stroke: 60 mm
  • Compression Ratio: 9.0:1
  • Valvetrain: OHV Pushrod
  • Horsepower:
1976-1979: 67 bhp (50 kW; 68 PS) at 5,200 rpm (US)
82 PS (60 kW) at 5,600 rpm (JDM, emissions cleaned)
95 PS (70 kW) at 6,400 rpm (JDM twin-carb, emissions cleaned)
87 PS (64 kW) at 5,600 rpm (JDM, no emissions equipment)
1980-1987: 68 bhp (51 kW; 69 PS) at 4,800 rpm (US)
  • Torque:
1976-1979: 81 lb⋅ft (110 N⋅m) at 2,400 rpm (US)
12.0 kg⋅m (118 N⋅m; 87 lb⋅ft) at 3,600 rpm (JDM, emissions cleaned)
12.3 kg⋅m (121 N⋅m; 89 lb⋅ft) at 4,000 rpm (JDM twin-carb, emissions cleaned)
12.3 kg⋅m (121 N⋅m; 89 lb⋅ft) at 3,600 rpm (JDM, no emissions equipment)
1980-1987: 84 lb⋅ft (114 N⋅m) at 2,800 rpm (US)
Found on

EA-72 Concept Engine

There was an unreleased EA-72 concept engine Subaru developed for use in the Japanese Market in 1989. It was essentially an EA-82 with an EA-71 crankshaft. This engine never came about as the Subaru EJ15 and EJ16 were already in development for this purpose.

Specifications

  • Displacement: 1,595 cc
  • Bore: 92 mm
  • Stroke: 60 mm
  • Compression Ratio: 8.7:1
  • Valvetrain: SOHC
  • Horsepower: unreleased
  • Torque: unreleased

EA-81

The Subaru EA-81 engine was produced from 1980 to 1989 and is a stroked version of the EA-71.

Specifications

  • Displacement: 1,781 cc
  • Bore: 92 mm
  • Stroke: 67 mm
  • Compression Ratio: 8.7:1
  • Valvetrain: OHV Pushrod
  • Horsepower: 73 bhp (54 kW; 74 PS) at 4,800 rpm
  • Torque: 94 lb⋅ft (127 N⋅m) at 2,400 rpm
Found on

EA-81T

The EA-81T is not an official engine designation from Subaru. The "T" is used informally to refer to the turbocharged version of EA-81 engines that are equipped with a turbocharger and multi port fuel injection.

Additional specifications
  • Compression Ratio: 7.7:1
  • Turbocharger Pressure: 7 psi
  • Valvetrain: OHV Pushrod
  • Horsepower: 95 bhp (71 kW; 96 PS) at 4,200 rpm (US)
  • Torque: 123 lb⋅ft (167 N⋅m) at 2,800 rpm (US)
Found on

EA-82

The Subaru EA-82 engine was produced from 1985 to 1994. It came with a carburetor, single point fuel injection, or multi port fuel injection. Most of the technical advancements introduced to the EA82 were utilized in the Subaru EJ engine, specifically, the SOHC valvetrain, and multi-point fuel injection.

Specifications

Subaru EA-82 Engine (displayed upside-down)
  • Displacement: 1781 cc
  • Bore: 92 mm
  • Stroke: 67 mm
  • Compression Ratio: 8.7:1 or 9.0:1 SPFI According to Subaru Factory Service manuals: 9.0:1 "carb" 9.5:1 SPFI
  • Valvetrain: SOHC
  • Horsepower:
    Carb - 84 bhp (63 kW; 85 PS) at 5,200 rpm
    SPFI - 90 bhp (67 kW; 91 PS) at 5,600 rpm
    MPFI - 97 bhp (72 kW; 98 PS) at 5,200 rpm
  • Torque:
    Carb - 101 lb⋅ft (137 N⋅m) at 3,200 rpm
    SPFI - 101 lb⋅ft (137 N⋅m) at 3,200 rpm
    MPFI - 103 lb⋅ft (140 N⋅m) at 3,200 rpm
Found on

EA-82T

The EA-82T engine was introduced in 1985 for the GL-10 models, and later on RX Coupe models. It is a turbocharged version of the MPFI EA-82 with modified cylinder heads and lower compression pistons.

Additional specifications
  • Turbo: IHI model RHB5 VF7
  • Compression Ratio: 7.7:1
  • Turbocharging Pressure: 7 psi
  • Horsepower:
    1985-1986: 111 bhp (83 kW; 113 PS) at 5,200 rpm
    1987-1990: 115 bhp (86 kW; 117 PS) at 5,200 rpm
  • Torque: 134 lb⋅ft (182 N⋅m) at 2,800 rpm

ER27

Main article: Subaru ER engine

References

  1. ^ Flammang, James M. (1994). Standard Catalog of Imported Cars, 1946-1990. Iola, WI: Krause Publications, Inc. p. 588. ISBN 0-87341-158-7.
  2. ^ a b c d e f 新型Subaru Leone (catalog) (in Japanese), Fuji Heavy Industries, 1978 {{citation}}: Unknown parameter |month= ignored (help); Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  • 1977 Subaru Factory Service Manual
  • 1983 Subaru Factory Service Manual
  • 1984 Subaru Factory Service Manual
  • 1987/1988 Subaru Factory Service Manual
  • Subaru Drive Magazine
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