The Subaru EJ20 engine was found in the:

Subaru Impreza (WRX/STI)
Subaru Forester
Subaru Legacy
Isuzu Aska (Accord OEM)
SAAB 9-2X

The Subaru EJ20 is a four-cylinder, turbocharged engine that has become a legend among automotive enthusiasts. It was first introduced in 1989 and has since undergone numerous upgrades and improvements to become one of the most reliable and popular engines on the market today.

Engine Specifications

The EJ20 has a displacement of 2.0 liters, with a bore of 92 mm and a stroke of 75 mm. It features an aluminum cylinder block and heads, along with a dual overhead camshaft design. The engine is turbocharged and intercooled, with a compression ratio of 8.0:1 in the early models and 9.0:1 in later versions.

Power and Torque

The power output of the EJ20 engine varies depending on the model and year of production. The early models produced around 220 horsepower and 215 lb-ft of torque. Later models, like the EJ205 and EJ207, produced up to 280 horsepower and 290 lb-ft of torque. The EJ20X and EJ20Y models produced between 220-280 horsepower and 220-295 lb-ft of torque, depending on the year of production.

Performance Upgrades

The EJ20 engine has a lot of potential for performance upgrades. The most common modifications include adding a high-flow air intake, exhaust system, and an upgraded turbocharger. Additional modifications can include a front-mount intercooler, larger fuel injectors, and a higher-capacity fuel pump.

There are also several aftermarket companies that produce engine internals, such as pistons, rods, and crankshafts, that can handle higher levels of horsepower and torque. These upgrades can significantly increase the power output of the EJ20 engine and make it more suitable for racing or high-performance driving.

Reliability and Common Issues

The EJ20 engine has a reputation for being reliable and long-lasting, with many examples reaching over 200,000 miles without any major issues. However, there are some common problems associated with this engine that should be addressed if they occur.

One of the most common issues with the EJ20 engine is the head gasket failure. This occurs when the head gasket fails to seal properly, causing coolant to leak into the engine or oil to leak out. This issue can be prevented by using high-quality gaskets and ensuring proper installation.

Another common problem is the ringland failure, which occurs when the piston rings break, causing a loss of compression and engine damage. This issue is most commonly seen in high-performance engines that have been modified for increased power output. Regular maintenance and careful tuning can help prevent this issue.

The Subaru EJ20 engine is an excellent choice for car enthusiasts who are looking for a powerful, reliable, and tunable engine. It has a lot of potential for performance upgrades and can produce significant horsepower and torque with the right modifications. However, like any engine, it does have some common issues that should be addressed to ensure long-term reliability. Overall, the EJ20 engine has proven to be a popular choice among automotive enthusiasts and remains a classic engine in the automotive industry.

First Generation EJ20 (1989-1993):

Displacement: 2.0 L
Bore x stroke: 92.0 mm x 75.0 mm
Compression ratio: 8.0:1
Power output: 220 hp @ 6,400 rpm
Torque output: 215 lb-ft @ 4,000 rpm


Second Generation EJ20 (1994-2000):

Displacement: 2.0 L
Bore x stroke: 92.0 mm x 75.0 mm
Compression ratio: 8.5:1
Power output: 280 hp @ 6,500 rpm
Torque output: 253 lb-ft @ 4,000 rpm


Third Generation EJ20 (2001-2005):

Displacement: 2.0 L
Bore x stroke: 92.0 mm x 75.0 mm
Compression ratio: 8.0:1
Power output: 276 hp @ 6,500 rpm
Torque output: 274 lb-ft @ 4,000 rpm


Fourth Generation EJ20 (2002-2006):

Displacement: 2.0 L
Bore x stroke: 92.0 mm x 75.0 mm
Compression ratio: 9.0:1
Power output: 280 hp @ 6,400 rpm
Torque output: 290 lb-ft @ 4,400 rpm


Fifth Generation EJ20 (2007-2013):

Displacement: 2.0 L
Bore x stroke: 92.0 mm x 75.0 mm
Compression ratio: 8.5:1
Power output: 308 hp @ 6,400 rpm
Torque output: 311 lb-ft @ 4,400 rpm


Sixth Generation EJ20 (2014-present):

Displacement: 2.0 L
Bore x stroke: 92.0 mm x 75.0 mm
Compression ratio: 10.6:1
Power output: 268 hp @ 5,600 rpm
Torque output: 258 lb-ft @ 2,000-4,800 rpm

BROWSE MORE JDM CARS/MOTORS:

Toyota 3SGTE
Toyota 2JZ GTE
Honda B
Nissan RB26DETT
Nissan VQ35DE
Nissan VQ35HR
Nissan KA25DE
Nissan RB25DET
Toyota 1JZ
Subaru EJ20
Honda F20C
Nissan VR38DETT
Honda K20A
Lexus 1UZ-FE
Nissan SR20DET
Subaru EJ25
Mitsubishi 4G63T
Mazda 13B-REW
Toyota 4A-GE
Nissan VQ37VHR
Mitsubishi 4B11T
Mazda 13B