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AEM
is proud to introduce its Electronic Throttle Control-equipped (ETC)
Plug & Play Programmable Engine Management System for the 2004
Subaru WRX STi (Part # 30-1820) and 2005-06 STi (Part # 30-1821)! The
combination of AEMs powerful engine management software, coupled with
their ETC module, delivers complete engine control AND immediate
throttle response via the factory sensors.
ETCWHAT IT DOES
AEMs ETC is a drive-by-wire system. AEM Engine Management Systems
for WRX STi models incorporate the ETC system, which controls the
factory electronic throttle body. When combined with the companys
programmable engine management system, this unit delivers complete
control of the engine via the factory sensors and actuators and works
with the OE drive by wire system without a piggyback module. It is
important to note that since this (and all) AEM Plug & Play
Programmable Engine Management Systems are to be used on off-highway
racing vehicles, installing the EMS negates the factory cruise control
function.
WHY YOU WANT THIS EMS FOR YOUR STi
Various OEM ETC systems design the accelerator position-to-throttle
position transfer function for optimum tailpipe emissions and fuel
economy, resulting in slow engine response that delivers a feeling of
lag from the time you press the pedal to when the engine responds to
this input. In other cases, the OEM Drive-By-Wire (DBW) system will
deliver a sense of perceived performance by providing more open
throttle than actual pedal input (for instance, 30% pedal input with
70% throttle opening event response), which could make attempting to
pass a vehicle on the racetrack ineffective at best. AEMs ETC unit was
designed with throttle response as a priority. It is calibrated to
deliver direct 1:1 throttle opening response.
Additionally, AEMs WRX STi EMSs eliminate the need to convert
back to mechanically actuated throttle body control units, throttle
position sensors and throttle blade actuators to attain throttle
control when using a stand-alone EMS without an integrated ETC unit on
vehicles equipped with OEM DBW systems.
ETC CRITICAL SAFETY FEATURES
The Firmware for AEMs WRX EMSs are custom-tuned specifically for
the corresponding WRX STi models to ensure optimum performance and
safety. Since the ETC system uses all of the OEM redundant sensors and
wiring, it continuously monitors all sensors and actuators for proper
operation. If a fault is detected, the ETC module transitions to a
Fail-Safe mode and gracefully disables the throttle body while allowing
the engine to continue to run at a high idle (approximately 1500-2000
RPM). This function maintains power-assist braking and steering,
allowing the user to safely stop the vehicle.
It is important to note that the ETC systems safety and Fail Safe
strategies rely on vehicle components as delivered from the
manufacturer and include (but are not limited to) wiring, ETC relay,
accelerator pedal assembly and throttle body. All of the original
components must be installed and functional to ensure both optimum and
safe performance of the ETC unit in the EMS.
ENGINE MANAGEMENT FEATURES
The 30-1820 and 30-1821 EMSs plug directly into 2004 and 2005-06 WRX
STi factory harness and require no additional wiring or hardware for
operation. Windows"-compatible software simplifies the manipulation of
data and the Tuning Wizard allows users to create a base map
specifically for a cars configuration regardless of what type of
injectors, non-ETC related sensors, coils or other changes have been
made. Additionally, AEMs EMS includes six general-purpose outputs and
seven definable switch inputs for the integration of nitrous,
water/methanol injection, map switching and more! Please visit the
electronics forum on www.aempower.com for more information.
 | Electronic Throttle Control response is quick and predictable. Feels just like a conventional cable throttle | | Controls
Subaru AVCS system: Camshaft advance angle can be accurately controlled
to allow quick turbo spool at low RPM and increased flow at high RPM | | Multiple
Fuel Strategies available: MAP sensor, MAF sensor, or TPS sensor can be
used for engine load calculations. Allows removal of restrictive OEM
MAF sensor | | Sophisticated
Boost Control: Tuner can adjust desired boost based on vehicle speed,
high/low boost switch, or throttle position. Closed-loop feedback
prevents boost creep and helps achieve target boost level even when
conditions change | | Closed-loop
fuel and ignition control: Knock control can adjust fuel and timing to
prevent engine damage when detonation is detected. O2 Feedback can
adjust fuel to achieve desired AFR. Exhaust Gas Temperature control can
adjust fuel to achieve desired EGT | | Individual Fuel and Ignition trims for each cylinder | | Internal
Datalogging: EMS records any 16 channels at up to 250 samples/second,
can be reconfigured for over 10 hours of logging. Datalogger can be
activated based on vehicle speed, engine RPM, throttle position, and
manifold pressure |
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