Subaru EA engine

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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.

The EA series engines have aluminum heads with aluminum blocks. Each cyinder has two valves, one for exhaust and one for intake. They came in either an Overhead valve 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.

Contents

EA-52

The Subaru EA-52 engine was produced from 1966-1970, and from 1970-1971 in the United States.

Specifications


  • Displacement: 977.2 Cubic centimeter
  • Bore: 72 Millimeters
  • Stroke: 60 Millimeters
  • Compression Ratio: 9.0:1
  • Valvetrain: Overhead valve Pushrod
  • Horsepower: 55 bhp (41 kW; 56 PS) @ 6000 RPM
  • Torque: 57 lb·ft (77 N·m) @ 3200 RPM

Found on


EA-61

The Subaru EA-61 engine was produced from 1969 to 1972.

Specifications


  • Displacement: 1088 Cubic centimeter
  • Bore: 76 Millimeters
  • Stroke: 60 Millimeters
  • Compression Ratio: 8.5:1
  • Valvetrain: Overhead valve Pushrod
  • Horsepower: 61 bhp (45 kW; 62 PS) @ 5600 RPM
  • Torque: 65 lb·ft (88 N·m) @ 4000 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 Cubic centimeter
  • Bore: 82 Millimeters
  • Stroke: 60 Millimeters
  • Compression Ratio: 9.0:1
  • Valvetrain: Overhead valve Pushrod
  • Horsepower: 80 bhp (60 kW; 81 PS) @ 6400 RPM
  • Torque: 73 lb·ft (99 N·m) @ 4000 RPM

Found on

EA-63

The Subaru EA-63 engine was produced from 1973 to 1976.

Specifications

  • Displacement: 1361 Cubic centimeter
  • Bore: 85 Millimeters
  • Stroke: 60 Millimeters
  • Compression Ratio: 8.5:1
  • Valvetrain: Overhead valve Pushrod
  • Horsepower: 58 bhp (43 kW; 59 PS) @ 5200 RPM
  • Torque: 68 lb·ft (92 N·m) @ 2400 RPM

Found on

EA-71

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

Subaru EA-71 Engine

Specifications

  • Displacement: 1595 Cubic centimeter
  • Bore: 92 Millimeters
  • Stroke: 60 Millimeters
  • Compression Ratio: 9.0:1
  • Valvetrain: Overhead valve Pushrod
  • Horsepower:
    1976-1979: 67 bhp (50 kW; 68 PS) @ 5200 RPM
    1980-1987: 68 bhp (51 kW; 69 PS) @ 4800 RPM
  • Torque:
    1976-1979: 81 lb·ft (110 N·m) @ 2400 RPM
    1980-1987:84 lb·ft (114 N·m) @ 2800 RPM

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: 1595 Cubic centimeter
  • Bore: 92 Millimeters
  • Stroke: 60 Millimeters
  • 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: 1781 Cubic centimeter
  • Bore: 92 Millimeters
  • Stroke: 67 Millimeters
  • Compression Ratio: 8.7:1
  • Valvetrain: Overhead valve Pushrod
  • Horsepower: 73 bhp (54 kW; 74 PS) @ 4800 RPM
  • Torque: 94 lb·ft (127 N·m) @ 2400 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 turbo-supercharger configuration of EA-81 engines that are equipped with a Turbocharger and multi port Fuel injection.

Additional Specifications

  • Compression Ratio: 7.7:1
  • Supercharging Pressure: 7 Pound-force per square inch
  • Valvetrain: Overhead valve Pushrod
  • Horsepower: 95 bhp (71 kW; 96 PS) @ 4200 RPM
  • Torque: 123 lb·ft (167 N·m) @ 2800 RPM

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.

Subaru EA-82 Engine (displayed upside-down)

Specifications

  • Displacement: 1781 Cubic centimeter
  • Bore: 92 Millimeters
  • Stroke: 67 Millimeters
  • Compression Ratio: 8.7:1 or 9.0:1 SPFI
  • Valvetrain: SOHC
  • Horsepower:
    Carb - 84 bhp (63 kW; 85 PS) @ 5200 RPM,
    SPFI - 90 bhp (67 kW; 91 PS) @ 5600 RPM
    MPFI - 97 bhp (72 kW; 98 PS) @ 5200 RPM
  • Torque:
    Carb - 101 lb·ft (137 N·m) @ 3200 RPM
    SPFI - 101 lb·ft (137 N·m) @ 2300 RPM
    MPFI - 103 lb·ft (140 N·m) @ 3200 RPM

Found On

EA-82T

The EA-82T engine was introduced in 1985 for the GL-10 models. It is an MPFI EA-82 with modified cylinder heads and lower compression pistons.

Additional Specifications

  • Turbo: IHI model RHB5 VF7
  • Compression Ratio: 7.7:1
  • Supercharging Pressure: 7 Pound-force per square inch
  • Horsepower:
    111 bhp (83 kW; 113 PS) @ 5200 RPM (1985-1986)
    115 bhp (86 kW; 117 PS) @ 5200 RPM (1987-1990)
  • Torque: 134 lb·ft (182 N·m) @ 2800 RPM

ER-27

The ER-27 engine was produced from 1988-1991. It is technically not an EA engine, although it is a 6 cylinder version of the EA-82. Many parts will interchange. There was never a factory turbo version of this engine. The ER27 designation was the first time Subaru incorporated the engines displacement into the series name.

Specifications

  • Displacement: 2672 Cubic centimeter
  • Bore: 92 Millimeters
  • Stroke: 67 Millimeters
  • Compression Ratio: 9.5:1
  • Valvetrain: SOHC
  • Horsepower: 145 bhp (108 kW; 147 PS) @ 5200 RPM
  • Torque: 156 lb·ft (212 N·m) @ 4000 RPM

Found on

  • 1988-1991 Subaru Alcyone (XT-6 in the United States/Alcyone VX in Australia).

References

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