To start with, you could scale the VE table by the ratio of your engine's displacement (409ci) to the stockLS1 (346ci) whose VE table you used, so in this case, x1.182.Once its running, you'll need to datalog your trims to begin fine tuning the VE table. Both EFILive andHPTuners have excellent logging utilities that bin your trims into the same cell structure as the VE table.