Installing a Custom Operating System requires a full operating system re-flash of the Controller into which the Custom Operating System is to be deployed. Full re-flashing is only available with FlashScan V2 Scan and Tune, and FlashScan V1 Commercial options. However, you can tune any pre-installed EFILive Custom Operating System with FlashScan V1 Personal version.  Of course, your FlashScan interface needs to support the vehicle you wish to install your chosen Custom Operating System on.

Gen-IV (E38 & E67) Gasoline Custom Operating System
E38 and E67 custom operating systems offer the following features.
• User defined Valet Mode switched from V2 (with password protection).
• N20 switched Fuel and Spark tables.
• Retain Traction Control operation when running in Speed Density mode.
• Extend Cooling Fan operational range allows users to turn on cooling fans below factory limits. 
• Anti-Theft (VATS) disable.

2 or 3 bar custom operating systems are not required for these controllers as the standard GM operating systems are designed to support forced induction motors.  EFILive has successfully mapped these features into our Virtual VE table.

Gen-IV (E40) Gasoline Custom Operating System:
2.5 bar Forced Induction extends the fuel tables to allow the PCM total control over fuel all the way to full boost. EFILive retains the standard fuel for non-boost conditions retaining factory drivability and adds new tables for boost control. Extend Cooling Fan operational range allows users to turn on cooling fans below factory limits.  The E40 custom operating system also features Anti-Theft (VATS) disable.

Gen-III Gasoline Custom Operating Systems:

Speed Density
Speed Density mode is preferred by most tuners when tuning high performance engines with large camshafts or forced induction. The MAF is removed (or disabled) and the PCM is tuned using the MAP sensor instead. Unfortunately, when the MAF is disconnected the stock PCM has been designed to go into a semi-limp mode (operating from the low octane spark map only). EFILive’s Speed Density Custom Operating System restores the high-octane spark map and full adaptive spark control, when operating in speed density mode.

Valet Mode
Valet mode provides a secondary rpm and speed limit that you can program into your PCM. When you flip a hidden switch, connected directly to the PCM, the vehicle is restricted to the preset valet RPM and speed limits. (This option is not compatible with N2O Control)

Two Step Launch Control
This custom operating system is an adaptation of the Valet Mode RPM limiter. No need for add on boxes, use the PCM to accurately control launching (This option is not compatible with N2O Control).

2 and 3 bar Forced Induction
2 and 3 bar Forced Induction extends the fuel and spark tables to allow the PCM total control over spark and fuel all the way to full boost. EFILive retains the standard fuel and spark tables for non-boost conditions retaining factory drivability and adds new tables for boost control.

N2O Control
N2O Control monitors the N2O system and signals the PCM when it becomes active. Extra spark and fuel calibrations are available to modify the PCM’s spark timing and fuel delivery immediately the N2O system is activated. (This option is not compatible with Valet Mode or Two Step Launch Control)

Diesel Custom Operating Systems

DSP² - Duramax Switchable Program² – suitable for LB7 and LLY Duramax.
DSP² allows users to switch on the fly between 2 tunes that you create.   In addition to applying EFILive’s DSP² custom operating system, users need to install a Single Throw Toggle switch to the ECM.  

Users can change a selected range of parameters that include Boost Levels, Injection and Timing – the key parameters to gain performance or economy from your multiple tunes.  DSP² also has 9 user definable thresholds that will switch an ECM controlled output; parameters include Boost Levels, RPM, Throttle Position.  These output could be used to control such things as Shift Lights, Warning lamps, Water injection, or N2O cut (throttle must be above 90% etc).

DSP5 - Duramax Switchable Program 5 – suitable for LB7 and LLY Duramax.
DSP5 is similar to DSP², except the number of switchable tunes has expanded from two to five.  An Advanced Staging option is also included.  In addition to applying EFILive’s DSP 5 custom operating system, users have the option to either install a 5 position resistance switch, or switch tunes via the FlashScan V2 interface.  Switching via FlashScan V2 eliminates the need to install a 5 position resistance switch. The user can even name the tune to be displayed on the V2 interface for easy reference.

The Advanced Staging option allows users to limit fuel delivery amounts which in turn allows you to control (or limit) power under certain conditions.  This function is useful for drag race staging by allowing you to launch at consistent RPM or boost levels without trying to control the throttle manually.

Valet Mode - suitable for LB7 and LLY Duramax.
Valet mode provides a secondary rpm and speed limit that you can program into your PCM. When you flip a hidden switch, connected directly to the PCM, the vehicle is restricted to the preset valet RPM and speed limits.  (This option is not compatible with DSP²).