Radium EMS Instruction Manual - 8. Engine Tuning
7. Before Initial Start-Up
Be sure that the vehicle is in the hands of an authorized factory trained AEM tuner. Connect to the
Radium EMS using a laptop and USB cable in the main EMS harness. For more detailed information
vehicle setup, visit the AEM electronics forum at
forum.aempower.com/forum/index.php
. Upload the
proper calibration file and open the Radium workspace file both found at
www.radiumauto.com
.
Verify that all of the parameters are reading properly, ie: throttle, engine load, coolant temperature,
intake air temperature, etc. If applicable, check that the power select switch (GPIO#2) and the traction
control switch (GPIO#8) are both triggering ON/OFF when depressing the respective switch.
Also test that all of the outputs are working, ie: low speed radiator fan, high speed radiator fan, boost
solenoid (if applicable), spare aux output, etc.
If an aftermarket wideband O2 sensor was installed, make sure that the factory (pre catalytic converter)
primary O2 sensor is unplugged. Otherwise, the O2 sensor signal will be altered and not accurate.
If a MAP sensor and IAT sensor was wired into the system, make sure to unplug the factory mass air flow
sensor. Otherwise, the MAP sensor and IAT signals will be altered and not accurate.
If this EMS kit was installed in an Exige-S, 2-Eleven, or
any Lotus that uses both a factory TMAP sensor and
the mass air flow sensor, one or the other MUST be
unplugged. Otherwise, the engine load signal to the
EMS will be altered. On the Exige-S, the TMAP sensor
is mounted on the intercooler (as shown) and the
mass air flow sensor is mounted on the air intake box.
Note: the Radium Exige-S startup map uses the TMAP
sensor. However, the mass air flow sensor can be
used for engine load calculations instead, if need be.
8. Engine Tuning
There is a low RPM rev limiter in ALL of the Radium startup calibrations. This limits the engine revs for
pre-tune liability. It is found in: Setup Tab | Main Rev Limits | Fuel Cut. This can be raised when the
vehicle is put on a dynamometer and ready to be tuned. Note: The stock Lotus ECU limiter is 8500RPM.
If the vehicle does not start, check all of the connections. Go to
forum.aempower.com/forum/index.php
for troubleshooting.
Radium-generated base start-up calibration files and workspace
file can be downloaded from the product page at:
http://tinyurl.com/a68pnra Toward the bottom of product
page, click the link (pictured at right) to download the zip files.
In the AEMTuner File menu, open the workspace file. When USB
connected to EMS, upload the correct calibration for your
particular setup in the ECU menu.