As this is a race car engine this is very simple. You can set the entire table to lambda 0.82-0.88, the same value in the entire table. If you want to sacrifice some response and improve emissions you can change all load sites below around 70kPa to lambda=1. Let all load sites above 3500rpm or so stay at the richer value (0.82-0.88). This will also improve your consumtion figures if you drive to the track. The idle quality will be better if you don't set that range to lambda=1. Going to 0.9-0.95 usually make the idle much smoother. Idle is of course even smoother in the 0.82-0.88 range but it can be a bit smelly.