G4+ FORCE GDI on the 2023 Mahindra Thar 2.0 petrol DI turbo

[Speedworks]

Needed help from anyone on how to go about setting up the g4+ force gdi on the new 2023 Mahindra thar mStallion m150 tgdi (2.0 Turbo Petrol GDI)

[koracing]

I'm going to guess that no one on here has worked on one of these before.  You're taking a 7 year old ecu and trying to fit it to a new vehicle only sold in India (I beleive).  It seems like if you want this to work you're going to have to trace out all the wires on the motor and map their functions.  That's to say nothing of any CAN bus requirements that may be present on the Thar.  I know - not super helpful.

[Adamw]

There is a basic guide starting on the help file page: G4+ ECU Tuning Functions > Auxiliary Outputs > GDI Pump Control > GDI Pump Control Tuning.

The important info you need to gather before starting:

• Injector P&H current/voltage/times, typically you determine this from scoping the same engine running on an OEM ecu.
• Injector flow rate.
• GDI pump solenoid P&H current/voltage/times, typically you determine this from scoping the same engine running on an OEM ecu.
• GDI pump cam lobe profile and lobe centerline.  This needs to be mechanically degreed out - guide in the help file.
• GDI pump piston diameter must be known.  Sometimes it is measurable from underneath, sometimes you need to cut an old pump open to measure.  if it is a Bosch HDP5 pump or Denso copy it can usually be assumed to be 9mm.
• Target rail pressure and injector timing from an OEM ecu is good to have as a starting point.  You can usually log this data via OBD2 port. 
• DI injector deadtime can be crudely approximated by varying rail pressure once you have achieved satisfactory rail pressure control. 
• GDI pump deadtime is important for good control but difficult to determine for the average technician.  You will likely just have to have a guess (1.5ms) and accept there will be some error baked into other parts of the calibration.  It is generally done by clamping a knock sensor onto the pump and scoping the time it takes for the valve impact to occur after energising the solenoid and needs to be tested over a range of voltages.