The first start is when engines are most vulnerable. A lean condition due to a completely wrong VE table can melt a piston in 30 seconds. Base maps are intentionally rich (targeting 11.5–12.5 AFR under load) and have extremely conservative timing (10–15 degrees BTDC). This is your insurance policy.
Their primary goal is to configure the ECU so a modified engine can start and run correctly before undergoing professional dyno tuning. ecumaster base maps
For an engine management system like the Ecumaster EMU Black The first start is when engines are most vulnerable
Base maps typically expect a narrowband O2 sensor (if any). If you use a wideband, you need to reassign the input and recalibrate fuel target tables. ecumaster base maps