Oh boy. The piston sellers are going to love these ideas. It reminds me a posts I've read where the guy cranks down on his fuel petcock and tells how great his engine runs. They're usually the ones you see posting back asking why their engines have lost power they once had. Lean 'em out guys. They'll scream! (for a little while)
No offence, Shan. I know you'd know how to control it so as not to cause damage. Actually the idea isn't new. Aircraft with recip engines and carburetors have had external mixture controls for decades.