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Hi,have you heared abaout Hubert W. Schillings ? He wrote a book about modelengines in witch he described a mechanical Injektion System with a gear pump. The book is called Boxer-, Reihen- und V-Motoren als Modell.Michael
Jason,The injection system on that DB603 model is a very crude affair. A single, simple gear pump feeds a constant supply of fuel all the injector nozzles simultaneously via individual check valves. The fuel flow/ pressure is controlled by a by pass valve (needle valve?) which dumps the excess fuel back into the tank. It is all open loop with no throttle control, no speed control, no mass air flow control. It is simply a continuous spray of fuel from all injectorsIt is the equivalent to the needle valve mixture control of a model aircraft engine, without the throttle control. So it is limited to mixture control at flat out running, remember the bladder tanks on racing DoolingsMike