We have a fairly comprehensive update available for the Atlas along with a few perks to go along with it. Implementation of boost control is complete, and we just need to manufacture the bits to go with that now. We also had to modify code in 34 operating systems for functions: variable maximum injector driver on time and correcting GM's conversion of fuel flow rate for the fuel pump control ring. The variable max injector driver on time is likely not needed for most people, but somebody running grossly oversized DI injectors with a high pressure pump that isn't producing near enough to exercise them may benefit by restricting things at lower engine speeds when the DI injectors are acting like a firehose. The fuel flow correction will largely pertain to the DSX bucketed fuel pump system for the Camaro/CTS-V but was also going to be necessary for the C7 dual brushless bucket that's coming up. The core problem was loss of control beyond 64 g/s of fuel flow because of GM's choice in storing data. As a result, the integral correction would have to wind up causing two side effects: fuel pressure always lagging behind commanded, and over pressure when letting off the gas because the ECU had to wind the integral correction back down. This code modification allows control of the system up to 512 g/s of fuel flow which... well... nobody's going to hit anywhere near that unless you have five of the brushless pumps!

Atlas FCU updates:

• Improved closed loop function including forced reset on fuel cut detection with resume based on exhaust mass flow (to prevent excessive lean data from fuel cut events from heavily impacting the trimming)
• Added support for variable maximum injector driver time
• Added base support for boost control - currently only Titan's Grip for LT4 and Magnuson 2650 (LT5 bypass and MAC valve coming soon)
• Options on Pin 16 for fuel supply support - CAN2PWM function (to convert factory CAN PWM pump request to a signal usable for 3-phase controllers) along with virtual Hobbs control based on fuel flow rate including hysteresis and time off delay

Atlas UI updates:

• Improved editor for custom injector data - no need to enter custom injector data outside of the Atlas browser interface
  

If updating your Atlas, please be aware:

1. If your UI version is older than 1.0.4.X, please contact us before attempting to update the UI.
2. You should always update the FCU first, so please make sure you are on the latest FCU firmware before updating the UI. You can also update the FCU without needing to update the UI.
3. If you wish to use the variable max injector driver function, you MUST update your Atlas to the June 27, 2025 firmware (or later). You also MUST contact DSX to have your E92 operating system updated as this requires an ECU side patch. To edit this, you must also have user defined parameters available on your cable. Once the ECU is patched, the function is disabled until you enable the flag in UDP. The base table is populated to give you a 5.5ms max pulse (because this is the magic number people seem to have a wild obsession with) until ~5455rpm at which point it transitions to the regular 180° clip. The table is crank duration versus engine speed.

Click here to download the 20250627 FCU firmware.

Click here to download the 1.0.4.3 UI firmware.

Click here to download the TunerPro definitions for the 20250627 FCU firmware.

Click here to download the XDF file for HP Tuners user defined parameters with the latest DSX E92 operating system for your vehicle.