AEM 30-71XX Infinity Stand-Alone Programmable Engine Mangement System Full Manual User Manual

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Infinity User Manual

The suggested tuning method is to set the AFR using the LambdaTargetTable or AFR Target
Table to a value safe and suitable for the engine. For normally aspirated engines a value of
13.0:1 or 0.887 lambda is usually sufficient at all operating conditions. For boosted applications,
the operating conditions dictate a safe AFR. Please consult a tuner knowledgeable in your
engine’s requirements for help. Once the target lambda (AFR) values are chosen, run the engine
at as many operating conditions as possible and adjust the VE Table to reach the AFR Target
Table values. Once the VE Table has been tuned to accurately reach the AFR Target Table
values at all operating ranges, then you can change the AFR Target Table to use different AFR
settings later. Never adjust VETable to run a different AFR, only to achieve the LambdaTarget
value.

The Injector Flowrate is very important in determining the fuel requirements. The Infinity ECU
uses actual Injector Flowrate [cc/min] to determine the proper injector pulse width. The
InjFlowRate [cc/min] table is calibrated from the Setup Wizard: Injector Flow, however the table
can be modified manually for unlisted injectors.