Description
( SAMPLE PHOTOS ) This is for a used JDM 2002-2005 Subaru Impreza WRX2.0L DOHC turbo AVCS system EJ205 2 WIRE CAM engine only. ( ELEC.THROTTLE TYPE )
30 DAY WARRANTY
THE JDM Version 8 Subaru Impreza WRX EJ20 Turbo Engine (AVCS) is superior to its USDM cousin in several
aspects. As usual, the USDM WRX receives an inferior engine based on the older
Version 6
GC8 motor.
The JDM WRX EJ20 on the other hand received an engine with all the bells and whistles
that one would expect of a high performance engine. While the 2.0 displacement remains the same, the JDM WRX features a bump in
compression (8.0 -> 9.0), better pistons developed using new hyper-cast
technology (such as in the USDM STI),
more aggressive cam profiles, better head casting, and of course the all mighty
AVCS.
For those who are not familiar with AVCS, AVCS is a control
device on the intake cams of the engine. Using an oil
based pressure system, the cam timing is either retarded or advanced to increase
or decrease overlap. This type of overlap essentially helps to create a
“perfect” camshaft,
allowing maximum power output throughout the power band while also assisting in
emissions cleanliness.
The bottom line is the JDM WRX engine (rated at
246HP compared to 227HP) is far superior to the USDM
WRX engine, and is what the USDM engine should have
been. The improvements significantly reduce the notorious turbo-lag associated
with the USDM WRX, allow the JDM
engine to respond better to aftermarket modification,
and produce a higher power output.
Swapping a JDM WRX engine into a USDM
WRX is a fairly straightforward process – the engine
drops right in. The stock ECU is fully compatible with this engine, although you
will not have the option of controlling AVCS. This is not a problem if you wish
to go this route, as the AVCS will default into high lift mode and you will not
lose any of the top end power (although you will not enjoy the benefits of the
AVCS midrange). If you want to run AVCS this is also not a problem, simply
pickup a JDM ECU (we offer these for sale), run a couple of additional wires for
the AVCS control, and AVCS is hooked up. An ECU reflash is required for anyone
not running less than 96 octane.
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