AEM 30-71XX Infinity Stand-Alone Programmable Engine Mangement System Full Manual - Manual (Page 246)

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© 2014 AEM Performance Electronics
Infinity User Manual
Boost Control Tuning
The Infinity has a very comprehensive and flexible boost control strategy. Using a pulse width
modulated (PWM) solenoid, boost can be controlled by vehicle speed, throttle position, rpm,
switch input, etc. AEM recommends using the AEM Boost Solenoid Kit (AEM P/N: 30-2400) for
boost control which is good for 120psi. Another solenoid that is commonly used is the GM PWM
Boost Solenoid (GM P/N: 1997152).
The AEM and GM solenoids, listed above, are both 3-way valves which can be either normally
closed (N.C.) or normally open (N.O.) valves depending on which port the filter (muffler) is
attached. 2-way boost solenoids are also found in factory turbocharged vehicles. Depending on
the manufacturer, these can be normally closed (N.C.) or normally open (N.O.) valves. In other
words, if they were unplugged, the some would block flow and some would allow flow to pass
through as if it were not installed. On the other hand, if a constant 12V and ground were applied
to solenoid, the exact opposite would happen. If an unknown solenoid is being used, this can be
easily tested by blowing through the solenoid while disconnected.
Because of the discrepancies between solenoids and wastegate types, there should be some
thought put into plumbing and how the Infinity Tuner software will control them. Below are a few
different examples, however, there are many other wastegate styles and turbocharger setups that
are not listed.