This setting will allow different methods of fuel injection. The firmware in the ECU will blank out the methods that are not adjustable. In some firmware a refresh will be forced to reshuffle GP outputs or cancel an illegal setting.

Batch Injection
This method all the injectors are pulse at the same time. It is not good practice as the cylinders does not get the fuel under the same conditions or injection angle, and is poor on power and economy. Spitronics programs does not use the feature unless for specific tasks.

Split Batch Injection
This method will pulse two sets of injectors 180° apart from each other. It is used where the trigger has even pulses and no cam signal is present. It is used on the standard systems where budget is of importance. For a 4 cylinder, the injectors are paired so that each cylinder gets fuel under the same condition or injection angle.

Split Sequential Injection
This method will pulse two injectors per driver together for the two cylinders that move at the same crank degrees. It will follow the sequence of the firing order. There may be 2 to 6 drivers in the sequence. The injector will pulse once per revolution and the injection time on the software will be divided in two. With other words for each revolution only half the calculated fuel is injected. This method does not require a home pulse and is the popular choice. There is very little difference in power and economy to a full sequential system.

Full Sequential Injection
This method will pulse one injector per driver in the same sequence as the firing order. The injector will pulse once every two revolutions and it will inject all the fuel in one squirt. Here a cam pulse or home signal is required to sink the injectors with a certain stroke one the engine. If there is no home pulse it will still do full sequential injection, but stroke phasing may vary from start to start. Note that an engine is normally started in split sequential mode and then goes over to full sequential after 500 rpm is reached. This helps for faster starting. This feature is mostly for ECU’s with enough drivers for injectors. make sure if firmware is available for your aplication before you buy.