I would like to give a brief description of the Electronic fuel injection I run on my 6cyl jab. The sytem is the simplest I could come up with after many years of trial and error. In my previous job (retired July 2003) I worked for Mitsubishi Motors Australia in product development . I managed the engine development and testing department. This gave me the the ability to source parts and develop the EFI system I am currently using. I have run this EFI on my Jab for 16month, it has done 130 trouble free hours on the engine. Fuel burn is between 14 to 17 ltrs/hr with good power output. Longest trip was from Wellington South Aust to Narramine last Easter. This system uses throttle body injection. The throttle body is fitted with 2x32mm blades . The injectors are on the engine side of the blades. For engine load a MAP(manifold absolute pressure) sensor is used. This is the simplest and most accurate way to take care of engine load and altitude correction. Air inlet temp sensor is used to help with air density correction and is fitted at the inlet to the throttle body. A hall effect pick up is used to monitor engine RPM. I decided not to use a engine temp sensor because it is difficult on a air cooled engine to get the type of curve I wanted. In its place I use a 0-10K ohm pot (rehostat) which is used like a choke on a carb engine and is only required for start on a cold day.No TPS ( throttle position sensor) is used and this helped to simplify the system. The ECU (electronic control unit) which runs the system is a Haltec F9 fuel only unit. The fuel supply is taken care of by a high pressure electric pump and the pressure is regulated by a regulator referenced to manifold pressure. As you can see its a very basic system but to get it to work correctly the fuel maps had to be set up accurately. This was and is a very difficult job and engine failure can be the result of wrong mapping. Once the maps are set up for al load and RPM condition the air fuel ratio will not vary regardless of conditions because the ECU corrects for the load,temp and atmospherc changes. All I know is my Jab is a pleasure to fly climbs at 2000ft/min cruises at 115Knts indicated at 2600rpm. VNE(132knts) can be achieved on climb.