2 degree timing advance on 5.6

[coastal6.0]

got a guy at a baton Rogue dealer that will do it for 40 bucks. is it worth it, and will i feel a difference? also, will i have to run 93 octane? kinda thinking i would like to try it. i'm pretty sure thats the same performance gains i would get from a power programmer just $350 cheaper. any tips on freeing up some hp would be greatly appreciated.

[Q45tech]

Important to understand what ignition advance is designed to accomplish.The maximum leverage of the piston pushing down and rotating the crank occurs at 14-16 degrees after top dead center.

The only way to know is to dyno an engine and measure the torque created at +- increments from oem design.

Gasoline varies [not just in octane] as does the effect of air temperature.

You want to be just UNDER the ragged edge of knock [1 degree less] but OBDII auto advances to measured knock then does the back of for you, unfortunately this process overshoots to negative [required to stop knock once it starts]....................eventually the system gets it right and remembers to not push things too far.

The other problem is each individual cylinder will have it's own knock/ignition advance limit............why 2 Knock sensors to help KS computer to decide between 3-4 cylinders.