Performance Chip? TS???

[Humt1271]

I'm looking to pull a little more power out of my 1997 7.3 and plan to pick up a performance chip in the near future. As it sits my truck is bone stock but I plan on upgrading to a performance air filter setup, downpipe, exhaust etc. At the moment I'm looking into getting a TS Performance chip but I figured I would get some input from people out there with experience with them. I plan to do no additional upgrades like injectors or a turbo so I'm not looking for anything crazy. I read that the 100hp and 140hp settings dont work unless I make additional upgrades (injectors). And can someone tell me exactly how these chips work? My thought process is more power means more fuel but they advertise them getting 2-4mpg better?? MPG gains and mild power increase is my goal at this point. Any clarification or details would be much appreciated.
Thanks!

[taylorking]

There's plenty of tuners out there to source custom tunes. Swamps, Tony Wildman, DP-Tuner, PHP, and Cale to name a few.

The mileage part comes in when you get an economy tune. Changes up fueling, shift points, line pressure, etc.