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Old 04-26-2010, 08:18 PM   #1
Shopow
Scooby Newbie
 
Member#: 184496
Join Date: Jul 2008
Chapter/Region: International
Location: Canada
Vehicle:
2003 Impreza WRX
Silver

Default Restrictor pill question?

I wanna run this, my humble question is which pill do I use. My stock one from my td04 or the vf39 pill. Just don't wanna screw anything up. Thanks in advance!

COBB TUNING
Calibration Notes for 2002-2003 Subaru WRX
AccessPORT Calibration STi Pink 2.0L VF39 91 v100
Compatible with New AccessPORT
Calibration Name: STi Pink 2.0L VF39 91 v100
Latest Calibration Rev: 1.00
Calibration and Map Notes Updated: 04/25/07
Description: VF39 Calibration for 2002-2003 WRX vehicles with STOCK
INTAKE SYSTEM OR COBB SF INTAKE ONLY, STi or equivalent TMIC, STi
pink fuel injectors, and a turbo-back exhaust system with high-flow
catalytic converter running 91 or 92 octane.
Hardware Requirements: Otherwise stock vehicle with a STOCK INTAKE
SYSTEM OR COBB SF INTAKE ONLY, VF39 turbo, STi or equivalent TMIC,
STi pink fuel injectors, and a Cobb turbo-back exhaust system with
high-flow catalytic converter. An equivalent turbo-back exhaust
system could be used. If the turbo-back exhaust system relieves
back-pressure to an excessive point boost creep is possible. If a
lesser flowing turbo-back exhaust system is used then boost targets
may not be achievable. The addition of any other hardware may make
the vehicle perform poorly.
Fuel Requirement: 91 or 92 octane. If you live in Arizona,
California, or Nevada, we have a specific calibration for the 91
octane fuel in your state, this calibration is called the VF39 ACN91
v100. If detonation is present, you should switch to a calibration
developed for a lesser quality fuel, VF39 ACN91 v100.
Power Output: +50% HP / + 33% lb-ft. Results may vary.
Copyright 2007 Cobb Tuning, Inc. All Rights Reserved.
TM
Boost Targets: ~17.5 psi +/- 0.7 psi peak boost pressure tapering
down to ~15 psi by redline, depending on vehicle and conditions. If
your vehicle is not achieving or exceeding the boost targets, you
may need to mechanically adjust your boost control system, please
refer to this document “How Subaru’s Factory Boost Control System
Works v1.X” for instructions. Boost cut is set to 20 psi at sea
level.
<<<<<CRITICAL INFORMATION!!! CRITICAL INFORMATION!!! CRITICAL INFORMATION!!!>>>>>
We have noticed that comparing the below dyno graphs to other dyno graphs that we have recorded on the
same chassis dyno is difficult to do. Several factors must be taken into account including gearing (both
the ratio of the gear these tests were performed in and the final drive ratio), aerodynamics, testing
conditions, parasitic drivetrain losses, etc. We have published these graphs because we want to do what we
can to educate our end users. Several qualitative improvements have been made to the calibration for this
vehicle which cannot be graphically represented. Please take these dyno graphs for what they are, a
graphical representation of measured torque and calculated horsepower across the below RPM range during a
wide open throttle pull in 3rd gear. We hope that you enjoy the improvements we have made to the
calibration for this vehicle.
<<<<<CRITICAL INFORMATION!!! CRITICAL INFORMATION!!! CRITICAL INFORMATION!!!>>>>>
Dyno Graph = STi Pink 2.0L VF39 91 v100
As measured on COBB Tuning’s in-house Mustang AWD Dyno
(All power figures are measured at the wheels, NOT corrected for drivetrain losses)
CAUTION!!! THIS MAP IS ONLY INTENDED TO WORK WITH 2002-2003 WRX VEHICLES THAT HAVE A
VF39, STi TMIC OR EQUIVALENT TMIC, STi PINK FUEL INJECTORS, STOCK OR COBB TUNING SF
INTAKE SYSTEM, AND TURBO-BACK EXHAUST WITH HIGH-FLOW CAT INSTALLED.
Copyright 2007 Cobb Tuning, Inc. All Rights Reserved.
Revision Notes:
1.00 – Original calibration. Based on the AccessECU VF39 reflash version 1.00.
Base Map vs. Real Time Map Differences - The base mapping contains some additional
logic for improved performance and is HIGHLY recommended to be used if you plan on
operating with a VF39.
Here is a list of tables (parameters) that may change when you select a Realtime map
with your AccessPORT:
Boost Targets
Turbo Dynamics Burst & Continuous (i.e.: turbo "gain")
Wastegate Duty Cycles
Fuel Injector Scale (size)
Intake Calibration (MAF Sensor)
Primary Fuel
Primary Ignition
Rev Limiter
Features such as defeated CELs and Closed Loop tables are not changed with Realtime.
This is why we highly recommend you running the Stage Base Map that best matches your
car's modification. Running the Stock Mode Base Map with a Stage Realtime map over it
will get you some of the improvements but no where NEAR what you would get if you
were to run the proper Stage Base map.
Again, you should have no reason why you will want to run the Stock Base map, unless
of course you're the type that doesn't like extracting the full potential of your
vehicle.
Additional Notes:
For use with a 2002-2003 WRX running a VF39 turbo, STi or equivalent TMIC, STi pink
fuel injectors, and turbo-back exhaust system with high-flow catalytic converter.
Additional modifications such an underdrive pulley or panel filter are still within
the acceptable parameters of this calibration. MUST USE FACTORY INTAKE SYSTEM OR COBB
SF INTAKE ONLY, NO OTHER AFTERMARKET INTAKES ARE CERTIFIED COMPATIBLE WITH THIS
CALIBRATION. Best if used with 91 and 92 octane. If any knock is present even when
using 91 or 92 octane, try using octane booster or a calibration developed for a
lesser quality fuel, VF39 ACN91 v100. Keep in mind Subaru recommends 93 octane for
even a STOCK STi.
Copyright 2007 Cobb Tuning, Inc. All Rights Reserved.
Measured Wheel Torque = blue, calculated wheel HP = red, measured relative pressure (boost) = green, grey = measured AFR
The above dyno graph demonstrates the relative pressure (boost) that should be
measured from the intake manifold. The RPM reference can be found on the X-axis in
pink numbers; the relative pressure reference can be found on the Y-axis in green
numbers. If your boost fuel curve is not within +/- 0.7 psi from this calibration,
while running the STi Pink 2.0L VF39 91 v100 calibration on your 2002-2003 WRX, then
you may need to have the vehicle analyzed by a professional tuning facility. Target
peak boost pressure is ~17.5 psi +/- 0.7 psi depending on vehicle and conditions.
Boost will likely taper to ~15 psi by redline to increase reliability. This is due to
the engine ingesting more air that the VF39 turbo can produce at higher RPM. Boost
cut at sea level is increased to 20 psi.
Copyright 2007 Cobb Tuning, Inc. All Rights Reserved.
Measured Wheel Torque = blue, calculated wheel HP = red, measured relative pressure (boost) = green, grey = measured AFR
The above dyno graph demonstrates the fuel curve that should be measured from the
exhaust stream. The RPM reference can be found on the X-axis in pink numbers; the A/F
Ratio reference can be found on the Y-axis in black numbers. If your fuel curve is
not within +/- 0.4 A/F from this calibration, while running the STi Pink 2.0L VF39 91
v100 calibration on your 2002-2003 WRX, then you may need to have the vehicle
analyzed by a professional tuning facility. Hardware such as intakes can skew the MAF
sensor signal and create a dangerously lean fuel curve. This calibration has been
established to run with the stock or Cobb Tuning SF intake systems only.
CEL Codes Defeated [WHEN USING AS BASE MAP] (** means new to latest revision):
P0037 - Rear O2 Sensor Heater Control Circuit Low **
P0038 - Rear O2 Sensor Heater control Circuit High **
P0139 - Rear O2 Sensor Circuit Slow Response **
P0420 - Catalyst System Efficiency Below Threshold **
P0545 - Exhaust Gas Temperature Sensor Circuit Low **
P0546 - Exhaust Gas Temperature Sensor Circuit High **
P1301 - Misfire Detected (High Temperature Exhaust Gas) **
P1312 – Exhaust Gas Temperature Sensor Malfunction **
P1544 – Exhaust Gas Temperature Too High **
Copyright 2007 Cobb Tuning, Inc. All Rights Reserved.
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