New e- fatbike build

Just build this new frame -mid drive with Tongshend and wonder if i could get more juice from the stock 500w 48v with my 20amp batt using the stock vlcd6 display. Like upgrading the firware. I am a newie to the e-world. Using my wife bike battery just for test,,,frame batt is on the way.

Have a look in the mid drive section "EBike Non-hub Motor Drives", there are many posts there about open source firmware for the TSDZ2/displays