AEM 30-71XX Infinity Stand-Alone Programmable Engine Mangement System Full Manual - Manual (Page 313)

Fuel System Setup 307
© 2014 AEM Performance Electronics
Fuel Injector
A fuel injector is a valve that can be opened and closed very quickly. To open the valve, current
must flow through a solenoid contained in the upper part of the injector assembly. The Infinity
triggers the injector by providing a ground path to the negative terminal. Fused power is provided
to the other terminal from the harness.
The Infinity is compatible with both high and low impedance injectors. To utilize the features of the
Infinity's internal peak and hold injector drivers, low impedance injectors must be used to
increase the current draw properly.
To determine the size of the injectors, the total engine power must be estimated or known. The
fuel pump calculations and BSFC information mentioned in the
Fuel Pump section of this
document provides a good understanding of the fuel requirements for an engine. The following
equation will allow you to determine the requirements of your injectors:
((Power x BSFC) x (1 + Safety Margin))/Number of Injectors = pounds/hour
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