The ecu will always try to compensate. By doing this mod, you're pushing the advance limit higher.
For example: We'll say the ecu can do a max spark advance of 60*. If the ecu detects knock, it will scale things back until there is no knock. Push the physical connection to get, say a maximum effective spark advance of 64*.
Your engine now has the ability to run a higher spark advance but still be able to scale back in the event of knock detection.
Highest power output for combustion occurs just before pre-detonation.
2012 SGM Ti DCT Stock and loving it
OEM multispoke 17" with stock rubber summer-X-ice 3's on stuck rims = awesomesauce