Configuring the JDM Legacy EJ206/EJ208 ECU for single turbo operation

Previously, swapping to a single turbo in the JDM Legacy meant also swapping to a single turbo-capable ECU with the same connector type. This ECU swap required downgrading to a wasted spark coil pack, removing the fuel pump control module and associated wiring changes.

Now with version 1.3.2.8 of projectLAMBDA Tuner all that hassle is no longer necessary. You can configure your stock TT ECU for single turbo operation without swapping the ECU or modifying wiring. The basic concept is to reflash the ECU to a single turbo firmware with some modifications specific to the Legacy engine. This allows removal of all twin-turbo specific sensors and actuators without triggering a CEL. An added benefit is the boost control has an additional map ‘Wastegate Duty Cycle – Base’ which can be tuned for better boost response instead of waiting for closed loop control of boost to kick in when throttle is increased.

Steps

  1. Create a new single turbo calibration. File->New, select 2000 JDM Forester AE831.
  2. Enable Fuel Pump Controller output. Set ‘Configuration->Fuel Pump Controller – Enable’* to ‘1’.
  3. Enable Coil on Plug ignition output. Set ‘Configuration->Coil On Plug – Enable’* to ‘1’.
  4. Copy ignition coil dwell maps:
    Rev A and B coils (black): Copy over ‘Spark Timing->Ignition Coil Dwell Base’ and ‘Spark Timing->Ignition Coil Dwell – RPM Compensation’ maps
    Rev C coils (grey): See maps at end of page.
  5. OPTION: The primary wastegate solenoid is on opposite side of the engine bay from the single turbo.  The secondary wastegate solenoid connector can be used instead by repinning the ECU versus splicing and extending the wires from the left hand side of the engine bay or having very long boost control hoses.
  6. Copy over any other maps you may want to keep the same such as Rev Limit, Boost Limit, Fuel, Spark Timing, Knock Control.
  7. Reflash the new tune and start tuning!

*There are separate settings for MT and AT transmissions. It won’t hurt to set up both.

 

projectLAMBDA Tuner 1.2.5 Released

Version 1.2.5 is now available for DOWNLOAD.


New Features

  • Added trouble code reader
  • Added more knock control settings
  • JDM ECUs: Added coil dwell settings
  • AD983, AE800, AE801, AE802, AE860, AF040, AF331, AH960: Now supported

Bug Fixes

  • Fixed an issue when initiating the BlueSSM connection.

 

If you have a JECS ECU that is not supported yet, please let us know using the Vehicle Request Form. Your ECU can usually be added to the software within a few days.

projectLAMBDA Tuner 1.2.2 Released

Version 1.2.2 is now available for DOWNLOAD.


New Features

  • License updating now uses copy/paste text instead of license files.
  • AF041, AE831: Boost maps added to live tuning
  • AG292 (EJ206 Rev C): Now supported

Bug Fixes

  • JDM ECUs: MAF bias now works properly when MAF limit is changed. Log parameters updated.

 

If you have a JECS ECU that is not supported yet, please let us know using the Vehicle Request Form. Your ECU can usually be added to the software within a few days.

projectLAMBDA Tuner 1.2.1 Released

Version 1.2.1 is now available for DOWNLOAD.


New Features

  • ECU reset command
  • Read ECU RAM for troubleshooting and debugging
  • AG302: Boost maps added to live tuning

Bug Fixes

  • AD984: Can now be flashed safely
  • AF041, AE831: Can now be licensed and reflashed

 

If you have a JECS ECU that is not supported yet, please let us know using the Vehicle Request Form. Your ECU can usually be added to the software within a few days.

JDM Legacy BE/BH base maps now available!

Legacy EJ206/EJ208 (Rev A,B,C,D) Base Map ECU Reflash: 400 CAD

  • Tunes your stock ECU to eliminate knocking caused by aggressive JDM spark timing
    • Spark timing reduced to safe level for Canadian pump gas
    • Revised boost control for higher boost and quicker turbo spool
    • Reduced torque dip during primary to secondary turbo switchover
    • 180 kph speed limiter deleted
    • Radiator fans turn on earlier to keep engine cooler
    • MAF sensor range increased 35%
    • ECU will get a Project Lambda Tuning license which allows reflash using BlueSSM (Rev A,B,C only)
  • Maps available for 91 and 94 octane
  • Car will be data-logged to verify engine is running safely with reflash

Text David from Drivehard Performance @ 604-711-4564 to book an appointment or call 604-270-2494 for further inquiries.


Pro Tuning Service

  • ECU will be custom tuned for your modifications and fuel octane
  • Wideband Air/Fuel Sensor will be temporarily installed if you do not already have one
  • Performance gains are measured with road dyno software; dyno tuning available at additional cost
  • Please make sure your vehicle is in good condition or let us know of any issues that should be addressed before proceeding with tuning
  • Typically 4 – 6 hours labour @ 120$/h

Text David from Drivehard Performance @ 604-711-4564 to book an appointment or call 604-270-2494 for further inquiries.

 

Results

Example results for stock Legacy B4 RSK 5MT EJ208 (Rev C) with hose 10 modification.

94 octane whp wtq (lbf-ft)
Stock (5C day) 187 172
Stock (-6C day) 209 198
Base Map 217 206
Pro Tune 228 212

 

91 octane whp wtq (lbf-ft)
Stock N/A* N/A*
Base Map 206 194
Pro Tune 218 200

Power measurements use SAE correction factor (25 C, 0.99 bar)
*Stock measurement on 91 octane could not be completed safely due to excessive knocking

ej208c_boost
Boost curve for Rev C. Rev B primary boost target is 12.5 psi, secondary target is the same as Rev C.
 

projectLAMBDA Tuner 1.2 Released – JDM/EDM/ADM ECU Support!

Version 1.2 is now available for DOWNLOAD.


New Features

  • JDM/EDM/ADM ECUs can now be read and reflashed
  • Map editing for the following vehicles:
    • SF Forester EJ205
    • GC/GF Impreza STI EJ207
    • BE/BH Legacy B4 RSK EJ208
  • Following vehicles will be added for next release:
    • GC/GF Impreza 2000 EJ205
    • GC Impreza P1 EJ207

If you have a JECS ECU that is not supported yet, please let us know using the Vehicle Request Form. Your ECU can usually be added to the software within a few days.

projectLAMBDA Tuner 1.1 Released – New Data Logging Support!

Version 1.1 is now available for DOWNLOAD.


New Features

  • Data logging feature for monitoring and recording ECU operating parameters
  • More maps for USDM SD ECUs: Ignition Coil Dwell, Temperature Sensor Calibrations, Warmup Fuel and Transition Fuel Maps
  • Map editing support for JDM Legacy B4 Twin-Turbo (EJ208) – Reflash support is coming soon!

Bug Fixes

  • Coolant temperature index for some maps now display correctly. ECU tuning is not affected and there are no compatibility with older tune files

projectLAMBDA Tuner 1.0.2 Released

Version 1.0.2 is now available for DOWNLOAD.


Change Log

  • Added support for 2002 Impreza 2.5L (USDM), 2002 Forester 2.5L (USDM)
  • Bug Fixed: Startup on Windows 7 systems prevented by ‘api-ms-win-core…’ DLL not found error
  • Bug Fixed: Sometimes .tune file is corrupted on save