Sometimes I am just amazed that my water cooled twin cylinder motorcycle engine (110 ci, 4" bore, 4.4" stroke), utilizing two iridium plugs per cylinder, 12 port electronic fuel injection, 9:1 CR, 3 valves and a 3D mapped computer that manages the 107 HP (@5000 RPM) engine with refinements from coolant temperature (startup), Baro, MAP, RPM, induction air temp, and O2 feedback.  Works at any altitude with a road.  Why aren't our aircraft engines so controlled?  Ahhh, don't answer that - it was a rhetorical question.