AEM 30-6905 Universal Programmable EMS-4 - Manual (Page 264)

Page 264 of 279 EMS-4 Install and Tuning Guide_Rev 1.6
setup wizard that will help define these flow difference options:
The example above defines 2 Primary injectors at 440cc/min each and 2 Secondary Injectors at
750cc/min each.
The last thing required to define the injectors is to tell the EMS how fast the injector responds
to the fuel pulse signal. Under Trims tab is the Battery Offset Staged table. This is how long
the secondary injectors take to start flowing fuel after they have been turned ON and is a
function of battery voltage. There are actually 2 different tables, one for primary and the other
for the staged injectors. Since the primary and staged injectors are usually different types,
these tables should be different. If your injector response data is not represented in the
wizards library, you can either select an injector from the same family or manually enter the
data in the Battery Offset Staged table.
The staged injectors are now completely defined in software. The only thing remaining is to
specify when and how much fuel should be directed to the new staged injection system. There
are 2 different methods for transferring fuel from the main injectors to the staged injectors.
The most basic is based on the duty cycle of the primary injectors where you set the maximum
injector duty you want to run through the primaries and the minimum ON time for the secondary