[baboon]

So much more complex engines now...

Just read about the BMW Valvetronic (variable valve lift technology)...

This engine doesnt use a throttle body to regulate air into the engine, it uses the intake valves to regulate the air. The throttle body still exists but used only as a fail safe, and during normal operation the throttle body is wide open therefore near atmospheric pressure is at the valves... Apparently this design means more fuel efficient during normal driving (low load) conditions...