Single Bank Fuel Control - CustomROM V1.1 and V2

When converting a twin turbo setup, such as how the S58 or S55 engine vehicles come from the factory, to a single turbo application, fueling is being switched to a single bank setup similar to B58 or N55 engine vehicles. We’ve made changes to make tuning these twin-bank vehicles with a single bank fueling approach and its required to select the right option under Map Configuration to make this happen.

it is critical to use the Map Configuration option on the map called Lambda Control (Single Turbo) and set it to TRUE (Single-Turbo/Fuel control).

Open

Once this option is set up and programmed on the DME fuel control is switched to use just the bank 1 primary O2 sensor for Lambda feedback to the DME.

If you’re keeping a twin turbo setup of any sort, then this setting shouldn’t be used or should be set to OEM.