Map Notes for 2002-2005 WRX

Supported Vehicles:

USDM 2002-2005 WRX

Map Revision:

Map	Version
Stage1	v400
Stage1+EBCS	v400

Map Availability:

Download from the COBB Tuning Subaru WRX OTS Map Database.

Required Accessport Firmware:

V3: 1.7.3.1-16468 or greater

Each map lists the minimum required octane. A higher octane fuel can be used safely on a map designed for lower octane. DO NOT use maps designed for higher octane with lower octane fuels. Top Tier gasoline should be used where available.

Maps designated with "93" are for use with 93 and 94octane fuel or better.
Maps designated with "91" are for use with 91 and 92 octane fuel or better.
Maps designated with ACN 91 are for use with 91 octane fuel or better fuel found in Arizona, California and Nevada as well as Canada.

These maps are designed for E10 fuel (fuel with 10% ethanol content). For those who only have access to E0 fuel (fuel with 0% ethanol) it is recommended to use the "91" octane version of the maps and datalog the car to ensure your fuel is performing to the necessary level. This is especially important for those using Canadian 94 octane E0 fuel.

If you are unfamiliar with how to datalog using the Accessport or what to look for, you can find a guide on our website here.

If any knock or detonation is present even when using the appropriate fuel, try reflashing a map that is intended for a lower octane fuel.

Map	Peak Gains*
Stage1 ACN 91	+12% HP / +18% TQ over stock
Stage1 91	+12% HP / +18% TQ over stock
Stage1 93	+15% HP / +20% TQ over stock

*Peak gains are measured as the difference between the highest points of the two plots.

*Largest gains are measured as the largest gain at any single point between the two plots.

Stage 1

Intake Requirements: Stock airbox or COBB Tuning SF Intake SUB00001IA
Exhaust Requirements: Stock or COBB Cat-Back Exhaust 512100
Boost Targets:
- ACN91: ~14.0psi peak boost pressure tapering down to ~12.0psi by the 7250RPM redline, +/- 1.0 psi
- 91 Octane 95 RON Minimum: ~14.5psi peak boost pressure tapering down to ~12.0psi by the 7250RPM redline, +/- 1.0 psi
- 93 Octane 98 RON Minimum: ~15.0psi peak boost pressure tapering down to ~12.0psi by the 7250RPM redline, +/- 1.0 psi

C.A.R.B Note

The above Stage1 calibration is legal for use on Emissions Controlled Vehicles in all 50 states when used in accordance with the manufacturer's application guide because it and the parts have a California Air Resources Board (CARB) Executive Order (EO) number:

Stage1+EBCS

Intake Requirements: Stock airbox or COBB Tuning SF Intake SUB00001IA
Exhaust Requirements: Stock or COBB Cat-Back Exhaust 512100
Boost Control Solenoid: COBB 3-Port Boost Control Solenoid 712750
Boost Targets:
- ACN91: ~14.0psi peak boost pressure tapering down to ~12.0psi by the 7250RPM redline, +/- 1.0 psi
- 91 Octane 95 RON Minimum: ~14.5psi peak boost pressure tapering down to ~12.0psi by the 7250RPM redline, +/- 1.0 psi
- 93 Octane 98 RON Minimum: ~15.0psi peak boost pressure tapering down to ~12.0psi by the 7250RPM redline, +/- 1.0 psi

Additional modifications such as an upgraded panel filter, lightweight crank pulley, aftermarket up-pipe, or recirculating bypass valve are still within the acceptable modifications for this calibration. If any knock or detonation is present even when using the appropriate fuel, try reflashing a map that is intended for a lower octane fuel. If your modifications do not match the hardware requirements listed above, you can have a custom Accessport map made at one of the many professional Subaru Pro-Tuners and e-Tuners.

Results may vary. Power as tested on 2002 - 2005 WRX vehicles using these identical calibrations. Generally speaking, the 91 and ACN91 calibrations run slightly lower boost, have a richer fuel curve, and a less aggressive ignition advance map to help compensate for 91 octane fuel; Arizona, California, and Nevada 91 octane fuel; and/or less than ideal atmospheric conditions. The maps designed for 93 octane are the most aggressive.

Non-Performance Maps

* Not intended for aggressive driving*

Anti-Theft Mode

Will not allow vehicle to start

Economy Mode MT

Fuel Requirements: 91 octane or better
Intake Requirements: Stock airbox or COBB Tuning SF Intake SUB00001IA
Exhaust Requirements:
- Stock or COBB Cat-Back Exhaust 512100
Boost Control Solenoid: Stock or COBB 3-Port Boost Control Solenoid 712750
Boost Targets: Mechanical minimum (typically around 6psi - 10psi)
Rev Limiter: 7100 RPM

Monitoring Boost Levels:

The best way to determine if you are hitting target boost is to watch the TD Boost Error parameter. This parameter is your target boost (including altitude and temperature compensations) minus your actual boost (negative values mean you are over the target by the amount while positive values mean you are under). Ideally you want this value to be between 0 and 1.0 at wide open throttle (WOT), but -1.0 to 1.0 is acceptable assuming that you don’t have any significant knock corrections. Overboosting is more likely to occur in higher gears and with colder outside temperatures, so be sure to verify boost levels during these conditions.

High Altitude:

A quick note for those of you that live at higher altitudes. It is common for turbocharged cars at higher altitudes to run less boost pressure due to lower air pressure and air density. Your turbocharger has to work harder to compress a less dense air mass compared to the same turbocharger at sea level. This must be factored in when determining if your turbocharger is running the proper amount of boost pressure and not being pushed beyond its efficiency range.

Example: If you live in Denver at 5280 ft and are trying to run a peak boost pressure of 15 psi, your turbocharger has to work the equivalent of making ~17.5 psi at sea level.

There are barometric compensations within the factory ECU that lower boost targets as you climb in altitude in an effort to keep the turbocharger in its optimal range. The COBB performance maps utilize these compensations and therefore, it is perfectly normal for the final boost target to be lower than what is listed for your map.

Revision Notes:

Version	Notes:
v400	Maps updated to eliminate unnecessary DTC Supression or updated versions for parity with other maps/vehicles within the platform
v350	Maps have been updated to eliminate unnecessary DTC suppression.
v311	Misc. maintenance updates.
v310	Massive update for Stage1 mapping. Includes refinements to boost control and overall ignition timing strategy.
v300	Now compatible with Launch Control feature (MT only). For complete details on how to enable and use the LC functionality, please visit this FAQ.