Radium EMS Instruction Manual - page 22
MAP (Manifold Absolute Pressure) Sensor
If a MAP sensor is used, the factory MAF sensor MUST
be unplugged for proper operation. For Exige-S and 2-
Eleven applications, the Radium EMS kit can use the
factory TMAP sensor. If looking to convert to speed
density for all other applications, the optional auxiliary
harness contains a connector labeled “MAP Sensor”.
Any MAP sensor can be calibrated to work via the
AEMTuner software. However, the aux harness is wired
for an AEM MAP sensor (or equivalent). Radium sells AEM 3Bar MAP sensor p/n: 30-2130-50. The MAP
sensor should be mounted securely and receive a pressure signal from the intake manifold plenum. This
can be accomplished by drilling and tapping a 1/8NPT hole in the intake plenum, or remotely mounting
the sensor and running a vacuum line from a port on the intake manifold to the sensor.
IAT (Intake Air Temperature) Sensor
If an aftermarket intake air temperature sensor is used,
the factory MAF sensor MUST be unplugged for proper
operation. The optional auxiliary harness contains a
labeled connector to attach a GM Intake Air Temp (IAT)
sensor. This sensor is available from Radium
Engineering as part of the “Speed Density Conversion”
kit. This sensor can be installed in the intake manifold
via a drilled and tapped 3/8NPT hole, or in the
intercooler piping after the charge cooler. If installing
on a naturally aspirated vehicle, the sensor may go in
the intake pipe/airbox or in the intake manifold.
Radium Boost Control Solenoid
If the vehicle is turbocharged, a Radium Engineering
boost solenoid can be purchased for boost control.
Within the optional Radium auxiliary harness, a 2 pin
connector is already prewired and will plug directly into
this controller.
The illustration to the right (top) depicts how to plumb
the boost hoses when utilizing a turbocharger setup
that has an internal wastegate.
The illustration to the right (bottom) depicts how to
plumb the boost hoses when utilizing a turbocharger
setup that has an external wastegate.
Note these are only examples of how to plumb the
boost solenoid to the wastegate. There are other ways
not mentioned in this instruction manual.