It looks like it's following the commanded A/F ratio. This is the standard stabilised fuel table and IIRC the Superchip only adjusts fuelling in the top two rows.
You can see there's a 'hump' of stoichiometric A/F ratio either side of 3215 rpm below 120% load.
Last edited by sailorbob; May 21, 2009 at 01:08 PM.