SEM – Engine Management – Board Only

$USD 110.0



Standalone engine management system based on Megasquirt MS3x Processor and firmware with enhanced inputs and output ports.  This device is customizable, you can choose the features you need and add it to be built, however there are some basic features which are 2 trigger inputs, 4 analog dedicated inputs (CLT, IAT, MAP, TPS, O2),  5 analog/digital inputs,  5 digital/frequency inputs, 5V ref voltage, USB connectivity. The other feature the device capable of are controlling sequential injection on engines up to 8 cylinders, or semi-sequential up to 16 cylinders, combined with direct fire ignition for engines up to 8 cylinders or wasted spark ignition on engines up to 16 cylinders, The 4 bar internal MAP sensor can read up to 44psi of boost, 2 Programmable knocking detector circuit can be used to adjust the ignition timing, and internal switch to pull up resistor.  and knocking) and 16 low side outputs to drive injectors or any solenoid valve.  Bluetooth or WiFi as optional connectivity, CAN bus, SD card for logging, Real time clock.


  • 2x Deffrential Trigger inputs (Hall/VR).
  • 16x High impedance low side output  3A each to drive injectors or to be used for auxiliary outputs.
  • 8x Ignition output 1A max (5V or 12V)/ 4 of them shared with inputs
  • 5x analogdigital inputs.
  • 5x digitalfrequency inputs.
  • 2x Programmable knocking input ./ shared with analog input.
  • 4 bar built in MAP sensor.
  • Fully compatible with MSextra Software
  • Fuel Table 16×16
  • Ignition Table 16×16
  • USB Connectivity.
  • Supports CAN Bus
  • Bluetooth or WiFi connectivity.
  • SD card logging (SD card not included).
  • Real Time Clock with backup battery (Battery not included).
  • Can be connected as standalone or piggyback


Fuel table size 16×16
Fuel table resolution 0.10%
rpm resolution 1 rpm
Accel enrichment Simple (TPS,MAP), Enhanced (wall-wetting)
Spark table size 16×16
Advance resolution (commanded) 0.1 deg
Injector phasing Bank/batch fire
Fully sequential (up to 8cyl)
Injector timing Timed for start, middle, end of injection pulse
Injector trim Mapped trim table per cylinder.
Spark trim Mapped trim table per cylinder
Distributor spark Y
Trigger return dizzy Y
Simple wheel decoding Y
Every tooth wheel decoding Y
Wasted spark Y
Coil on plug Y
Dual dizzy Y
Cam / 2nd tach input Y
Number of spark outputs 8
Rotary trailing Y
HEI7, GMDIS Y (with bypass control)
Oddfire wheel decoder Y
Oddfire dizzy Y
Neon/420A Y
36-1+1 Y
36-2-2-2 Y
Subaru 6/7 Y
IAW Weber-Marelli Y
Mitsubushi 6g72 Y
4/1 CAS Y
4G63 (Miata) Y
99-00 Miata Y
Renix 44-2-2 Y
Twin trigger (aka. dual spark) Y
Suzuki Swift Y
Suzuki Vitara Y
Daihatsu 3 cyl Y
Daihatsu 4cyl Y
Rover K Series 36-1-1 Y
Rover K Series 36-1-1-1-1 Y
Rover K Series 36-2-2 Y
Honda VTR1000 12-3 Y
Chrysler 2.2/2.5 Y
GM 7X native Y
Nissan 360 tooth CAS SR20, RB25
Load methods SD, AN, map/baro (load%), MAF, ITB
Load blending Y
Load tables 2
Staged injection Y
Includes sequential staging and multiple banks.
Over-run fuel cut Y
Tachometer output Y
Launch Control/flat shift Y
Spark cut rev limit Y
Dwell duty% Y
Dwell battery correction table of %ages
Cranking pulsewidth table of %ages
Alternate cranking injection Y
Specific cranking advance, dwell Y
Fixed timing for setup Y
Test mode Pump, Inj, Coils, Idle
Closed loop idle control Y
Boost control Y (open or closed loop with PID control)
Nitrous control Y (2 stage progressive)
Knock sensor (software) Y
Realtime barometric correction Y
Water Injection Y
Table Switching Y
Configurable outputs Y
AFR target tables Y
Dual fuel tables (per bank) Y
Synchronous sensor sampling Y
CAN communications Y
Built in tooth/trigger loggers Y (tooth, trigger, composite, sync-errror)


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