Chevrolet Corvette Stingray C7 Forum - View Single Post

purpleRac3r · 05-22-2014, 10:14 PM

The way it was explained to me is that it only operates in Eco & Touring modes for automatics, and only in Eco mode on manuals. In most situations while in those modes, it will default to open, which is to say whenever it is running on all 8 cylinders. They only close when on 4 cylinders, and only intermittently at that. Kind of a computer-controlled flutter to help offset the imbalanced exhaust pulses created by running just 4 cylinders. The valves shouldn't be operating at all in Weather, Sport or Track modes, since AFM is deactivated in those modes.

05-22-2014, 10:14 PM	#4
purpleRac3r Drives: 1974 & 2014 Corvette Stingrays Join Date: Mar 2013 Location: Troy, Mo Posts: 614	The way it was explained to me is that it only operates in Eco & Touring modes for automatics, and only in Eco mode on manuals. In most situations while in those modes, it will default to open, which is to say whenever it is running on all 8 cylinders. They only close when on 4 cylinders, and only intermittently at that. Kind of a computer-controlled flutter to help offset the imbalanced exhaust pulses created by running just 4 cylinders. The valves shouldn't be operating at all in Weather, Sport or Track modes, since AFM is deactivated in those modes. __________________ '74 Stingray coupe, heavily modified, as seen in August 2011 VETTE magazine, 2014 Stingray Z51 #196, ordered 02/11/13, built 08/29/13, Museum Delivery 10/04/13, driven daily!