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Old 13-12-2011, 02:08 PM
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EJ Engines


This engine series is used for non-Japanese marketed WRX models in the world market as of 1999. The Japanese WRX models use the EJ207 from 1999~2001, except the 5-door wagon which also uses the EJ205. After 2001, all WRXs use the EJ205, with an exception of the USDM models, which used the EJ205 until 2005. The EJ205 has a 8:1 compression ratio.

To identify an EJ205:

Coil on plug*
idle air integrated into throttle body
open deck block

Usage: Impreza WRX

99~01 (JDM Wagon Body only)
01~current (all JDM)including Forester Cross Sports and STI (9:1 compression ratio)
02~05 (USDM)
99~current (all other markets)

NOTE: The Australian Spec MY00 EJ205 does not have coil on plug but can be identified from the VIN of the vehicle (if known) where the 10th digit will be Y (for year 2000) and the 6th Digit will be 8 (for the 2000yr/EJ205)
[edit] EJ207

The EJ207 has a 8.0:1 compression ratio.

To identify an 9/99-9/2000 EJ207

Wasted spark coil pack off center of manifold
Inlet under manifold
Red intake manifold
Semi-closed deck block


Impreza WRX STi 1998~present (JDM, specifically Homologation models for World Rally Championship)
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Old 13-12-2011, 04:08 PM
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while the poor old RS ej20 had a close deck block, good for 4 bar...
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blocks, difference, engine

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