Hey all
I would like to post about an experiment I have just successfully finished.
I have a 2016 Camaro SS with a Magnuson supercharger on it. I recently finished the addition of a smoothboost controller which i have wired to the E92 ECM and have enabled the boost control functionality
I have seen previous posts how this is not possible, and you need the ZL1 OS to make this work. This is simply not true.
There are a good amount of hurdles, however it is very much possible.
With this change, The Driver Demand tables along with Torque tables will be what the computer uses to determine how much boost to employ at any given Torque Request
This provided me with a much more linear pedal.
At this point there are a few tuning points that I must make to any looking to follow this template.
I offer this Post in good faith, and I can not make promises of the completeness of the tuning advice or hold any liability
This requires re wiring the E92 ECM, if you are not comfortable with pin configurations or soldering this may not be for you.
There is a real risk of damage to your motor and ECM if pieces are not done correctly here.
There may still be pitfalls to this method that I have not ran into yet.
I can not confirm if this method holds true in different scenarios
E92 Wiring Changes:
Move from:
X1 -- 4 YE/WH 3200 Throttle Inlet Absolute Pressure Sensor Signal
X1 -- 5 Throttle Inlet Air Pressure Sensor Control 5V
to
X2 -- 45 YE/WH 3200 Throttle Inlet Absolute Pressure Sensor Signal
X2 -- 64 Throttle Inlet Air Pressure Sensor Control 5V
Add Supercharger inlet pressure signal
This sensor is a standard 1 Bar Map sensor that is placed After the throttle body, before the Roots
X1 -- 5 Super Charger Inlet Air Pressure Sensor Control 5V
X1 -- 20 Super Charger Inlet Air Pressure Sensor Low Reference
X1 -- 4 Supercharger inlet pressure signal
Add Supercharger Temperature sensor
In the LT4 context, this sensor is combined with the main MAP sensor on the back of the blower
X1 -- 13 Induction Air Temperature Sensor 2 Signal
The IAT 2 Sensor uses the same ground as the Main MAP sensor
X2 -- 63 Manifold Absolute Pressure Sensor Low Reference
Add boost control PWM output signal
X2 -- 71 BN/YE 258 Waste Gate Solenoid Control
Wire (X2 --71) to the Negative wire of the Smoothboost PWM controller
One can pull 5v from X1-17 on the ECM to provide a reference voltage to the smoothboost PWM controller
X1 - 17 Barometric Pressure Sensor 5V Reference
(Note: using the smoothboost 5v PWM controller will result in P0033 and P0034 being present the factory Zl1 boost control actuator shouldnt have this issue )
First you must have enabled SC-SCIAP-TIAP in the sensor config. Along with adding the IAT2 and SCIAP sensor wires into the ECM.
Under Engine -> Airflow
Sensor Config: SC-SCIAP-Tiap
Configure IAT 2 Sensor Cal
From my experience IAT2 sensor is automatically picked up with these changes. And may be picked up without this change
SCIAP will be configured by
[ECM] 4013 - Supercharger Inlet Air Pressure Sensor Linear:
[ECM] 4014 - Supercharger Inlet Air Pressure Sensor Offset:
At this point, I suggest ensuring the vehicle still starts and runs. A good minimal viable point.
You may need to re tune your VVE/MAF config to prevent Airflow DTCs.
The Factory Boost controler is very specific about DTCs being enabled and functioning correctly
The next section will be to enable the boost controller.
Alot of this section was copied straight from a Zl1/LT4 Tune file
Under Engine -> SC/TC General
(IAT2 is required for Type Fitted to be set to Supercharger)
Set "Type Fitted" to Supercharger,
Set Actuator Type to SC Bypass
Set the Actuators to DC Motor.
Under Engine -> Airflow Turbocharger
**Set BOV/BPV to Enable**
Set **Wastegate Open Boost** to the current Max kpa from the blower, My example is 140 kpa
Configure Speed map to match the supercharger spin speed (I copied Zl1 Values Here)
Configure **Pressure Ratio Max limits** (and column axis if needed).
The Boost control Code is very sensitive to Any Airflow DTC's
Even if they are disabled, They will cause the boost controller to not allow any boost to build.
Especially the P101 P106 P0121 Tests must be enabled.
Also P0068 and P1101 must run and not produce any errors
I Always Suggest Keeping All vehicles Emissions compliant and never disabling any DTCs
The Key that i found That i could not find mentioned anywhere on the innerwebs:
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The intercooler Circuit Must not throw an error.
Under System ->Coolant Pumps --> Intercooler
Set To Fitted
Set Enable Conditions to never be enabled
(unless one wishes to install a intercooler pump and have it controlled (not tested))
At this point in VCM scanner
(you may have to repoll for parameters)
Log these Parameters
- Desired boost
- Boost Duty Cycle
- Boost Torque
To prove all the main enable parameters are correct, you should be able to at this point, with the engine on and idling
open up "Vehicle Controls" in VCM Scanner
set the desired boost high, This should change the Boost duty cylce to 0 from ~100
Reset Desired boost on Vehicle Controls, i would not recommend driving with manual control enabled.
From here, There may be more tuning required.
Proceed at your own risk. There is no warranty implied here, I claim no responsibility for any mis configured catastrophes
3/10/2023 Update!
The enable switch for P0033 P0034 and P0035 diagnostics also must be thrown to complete this setup.
There is also in existence a IAT2 Enable switch, whiich im still unsure if is needed or not for this to work properly
They are not currently in the VCM suite
I have located this switches for the 2016 camaro ss, and will locate it in other tune files on request.
Meta Data
- 2016 Camaro SS
- OS: = E92 12673677
- Magnuson Supercharger 2650
- Smoothboost controller (With PWM addition)