I don't include any engine technology that doesn't come with a stick.

 

Got that right

 

I don’t think it will have AFM.

I believe that SIDI (GM speak for GDI) will replace AFM. It has allows you to run the mixture extra lean without the big emissions hit you would get in a port injection motor. By all accounts the AFM motors don’t a whole lot of time in 4 cyl mode, so it seems unlikely that there would be a lot of situations where the load is low enough for both systems to be active. Especially with some well chosen gear ratios for 5th & 6th.

Also DOHC makes AFM a lot more difficult and expensive and the same effort & expense would allow a vTec like second cam profile. So instead of using a collapsing cam follower to disconnect a cam lobe at low load, use it to activate a longer duration, high overlap second lobe at high RPM. That would let us a have a smooth idle, good mileage and clean emissions until you floor it and switch to a cam profile that would never pass a emissions test.

 

I only said that based on the rumors that the Gen V's could still be Pushrod...but I like your idea just as much. On a side-note, I never quite understood why AFM wasn't simply an injector and spark cut-off...What's the point of shutting down parts of the valvetrain? reducing load maybe?


Vtec...

 

Wasn't there an article posted a few weeks back where a GM powertrain engineer stated that the LS9 would be the last non-DI smallblock?

 

There will be both pushrod and DOHC versions of the Gen V, in two displacements.

 

You guessed it. If you kill the fuel to a cylinder it becomes an air pump and the other four cylinders need to burn more fuel to meet that load. When the valves stay closed the air trapped inside the cylinder acts like a spring, pushing the piston back down with most of the force that was requrired to move it up.