I owned an early Volvo inline 6 cylinder that had a pretty primitive port injection system on it. It was made by Bosch, and had two sets of points that triggered from lobes on the distributor shaft below the breaker plate to squirt 3 injectors at a time, controlled by a series of inputs like RPM, intake vacuum, throttle position, coolant temp, etc. It also had a "cold start" injector that delivered a rich mixture during warmup, controlled by a timer. A similar system could probably be cobbled up on a stovebolt, using three injectors, one installed into a stock intake manifold, aimed at each intake port in the head. The throttle base for a carburetor without the upper pieces attached could be used for air volume control. Three crankshaft position sensor triggers could be used to fire each injector just before the intake valve opened on each pair of cylinder head intake ports.
Jerry
