I use Map switching on my evo8 ecu.
I'm sure its the same idea with ecmlink.

I adjusted the global for fuel.
And just copied my timing maps, and ran a bunch of extra timing on the AltMap.

Pump turns on around 8psi with a 12 or 14 nozzle(I forget), maps switch, little red led turns on, and basically VTech and some wizard magic happens. AFR's are high 11's dips into the 12's occasionally.

I have also been told you can shoot for 12.5... but my balls haven't been big enough to attempt that yet.