Thats a bit extreme to consider this mod as an electric supercharger, actually match porting doesnt always show improvements and neither do incorrect porting and polishing but thats another area that is hard to parallel or compare with this modification. Ive learnt that flow and combustion are most efficient when these events are centralised yet highly atomised away from port and bore walls much like modern direct injected diesel chambers for one.

I wouldnt never suggest using the Iris with the Gadgetman mod. You have to choose one or the other but so far would prefer an Iris that works like a camera shutter instead.

I dont agree with butterfly throttle been linear due to the rounded passage (square throttle body would be linear but not suitable for sealing unless using rounded ends).

A butterfly throttle body opens up from the bottom and top the same but initial opening focuses the air at the base of the passage into the manifold so its not ideal for laminar flow while creating turbulence also at the top as air hits the top edge of butterfly and most likely deflects up causing a pressure drop up the top and tumble turbulence instead of swirl or centralised flow. A shutter or Iris TB just makes logical sense to me so far.