I'm beginning to tune with my 14 gmc sierra L83 genV. Hopefully simple question. On a completely stock engine is it necessary to log the MAF or can I just add a percent or two and watch my wideband? Same question for vve tables as far as logging in SD? I'll have to learn more about the torque tables to understand if those would do any good for me to tweak on a stock truck. Any info for beginning steps would be much appreciated.