Anyone have real results from using a Diablo Intune on the 4.3 Eco? 2014 Silverado. Want to change the quick 1st to 2 nd shift and see if i can get extra bang from that engine. 91 Octane says increase of 20 HP. I added a KN cold air. I heard turning off the Active fuel mgt to not have it go into 4 cyl improves the boost. Any real good results?