what are the changes to made made and what will need to be change like high octane fuel map and how octane ignition timing map?

 

Not really sure why you would be worried about fuel saving at idle. Even if you got your tune absolutely perfect at idle for saving fuel you would maybe save a gallon a year or less. Cars use very little fuel at idle.

 

It runs o2 sensor closed loop control at idle so regardless what you put in the fuel map it still looks for 14.7 , if you disable o2 sensor control and force it into open loop then it runs from the fuel map , but hardly worth the hassle

 

ok, thanks! great info