08 Silverado 5.3 Tuning, tuning-spark/pe mode/

doin some tuning w a buddy of mine semi amateur at the efi live, trying to clean up the dead spot on wide open throttle from 0-20 mph roughly. seems as when you hit the gas from 1700 rpm to 2300 rpm it has no grunt per say "dead spot"off the line. have removed torque management, and most of the disablers like traction control... any ideas what to do to clean it up? timing seems to be at 20 degrees advanced between 1700-2300 rpm, does a guy need to turn it up there? any ideas thoughts appreciated thanks

You probably should log commanded AFR to make sure that PE mode is kicking in and the engine is getting enough gas and not staying in closed loop.