Turbosmart BOOST CONTROLLERS – ELECTRONIC - e-Boost2 (2005-current) – Complete User Manual - Manual (Page 20)

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RPM Signal Connection (OPTIONAL)
RPM signal connection is ONLY for Tacho mode, RPM set point mapping, Boost correction, shift light function and other advanced
features. Turbosmart recommends your RPM signal be connected by an appropriately qualified technician or automotive electrician. For
further information consult your vehicle’s manuals or your local automotive electrician. The e-Boost2 is ONLY able to accept an RPM
signal in the form of a square wave that is switching between 0V and 3.5-12 volts.
The following points should be followed to connect your RPM signal to an ECU pin.
-
Locate your ECU RPM signal wire and splice into the signal wire coming from your ECU.
- Check the output you are splicing into is a square wave that is switching between switching between 0V and 3.5-12 volts with an
appropriate meter.
- Connect the yellow RPM wire from the e-Boost to the spliced section of the ECU RPM out.
- Turn on the e-Boost2 and configure your signal to the number of cylinders or rotors your engine has using the CYL (cylinder)
parameter located in the setup menu.
- In live mode with your engine running press mode once to show live RPM. The display should be reading RPMx100 e.g. 015 on
the display indicates 1500 RPM. If the display is not reading correctly re-check the cylinder configuration in the setup menu.
- Note: If the OEM tachometer does not display RPM after installing the E-Boost 2, a 2 ohm or higher resistor needs to be
installed in line between the ECU RPM output pin and the E-Boost 2.
The following points should be followed to connect your RPM signal to the negative terminal of an ignition coil. NOTE: Caution should
be exercised when connecting to the negative terminal of an ignition coil and Turbosmart recommends an ECU connection where
possible. IMPORTANT! The RPM signal should not be connected to a coil of a capacitive discharge ignition (CDI) system.
-
Check the signal from the negative terminal is a square wave that is switching between switching between 0V and 3.5-12 volts with
an appropriate meter. If the voltage is below 3.5V (coil trigger signals tend to have a very low voltage) the e-Boost will not read a
signal. In this case, a signal amplifier (also known as a tach adapter) must be used to boost the signal.
- Connect the RPM signal wire from the e-Boost2 to the negative terminal of an ignition coil or tach adapter (which ever method is
used).
- Turn on the e-Boost2 and configure your signal to the number of cylinders or rotors your engine has using the CYL (cylinder)
parameter located in the setup menu
- In live mode with your engine running press mode once to show live RPM. The display should be reading RPMx100 e.g. 015 on
the display indicates 1500 RPM. If the display is not reading correctly re-check the cylinder configuration in the setup menu.
SL (Switch Logic)
The e-Boost2 is capable of 9 different methods of boost switching.
IMPORTANT! Before setting up your boost group switching you should know what boost pressure you achieve with each set-
point setting in its relevant boost group. For example if you want to run four different boost levels you should set up four groups and
test what each of your boost levels are before setting up switching between each boost group.
ISP (Internal switching point): Switching between boost groups is achieved using the UP and DOWN Keys
ESP (External switching point): Up to 4 boost groups can be selected directly by externally grounding or earthing the green and/or
orange wires from the e-Boost2 loom to the chassis. The appropriate wire corresponding to the set point you wish to select is shown in
the table below.
Active set point Green wire Orange Wire
Set point 1 Not connected Not connected
Set point 2 Earthed Not connected
Set point 3 Not connected Earthed
Set point 4 Earthed Earthed
BOD (Boost on demand): Allows you to select a boost set point for an inputted value of time before returning to the previous set point.
When the BOD function is activated within the switch logic menu, an additional sub-menu will appear in bG2 and bG3 of the boost
menu called bd2 and bd3. bd2 is the value of time in seconds, bG2 will be selected before returning to the previous set point. Bd3 is
the value of time in seconds, bG3 will be selected before returning to the previous set point.
 Earthing the green wire will trigger bG2 for the inputted value of time
 Earthing the orange wire will trigger bG3 for the inputted value of time
 Maximum time that a boost group can be selected is 99 seconds
 The boost and setup buttons on the e-Boost2 unit will function as normal in ISP mode.