Megasquirt-3 with MS3X
This is the present top of the range ECU in the ‘traditional’ Megasquirt range. It has 8 fuel and 8 logic spark outputs offering full sequential fuel and spark for hi-z injectors and logic level coil-on-plug coils (or high-current coils with suitable external ignition module.) This supports full-sequential on a V8 or semi-sequential with wasted spark on a V12. Spark and fuel are fully trim-able per channel and injector timing is mappable for optimum power (~1% gain available) Six relay or solenoid outputs for nitrous, boost, fan control, shift light, tachometer outputs etc. Switch inputs for launch, idle-up, nitrous-in etc. and additional sensor inputs for external MAP sensors or measuring pre/post intercooler etc. On-board SD-card datalogging allows fast datalogging without the need for a laptop while logging. Built-in USB-serial adapter eases connection to modern laptops.
CAN communication ability to interface with extender boards for more inputs and outputs on the more complex installs – e.g. multiple EGT, multiple widebands, speed sensors etc. Calibration to adapt to OEM temperature sensors is straightforward and numerous wideband calibrations are supported.
Initial setup is aided by test modes for the fuel and spark and by built-in tooth loggers to help diagnose incoming tach signals.
The MS3 software includes many ‘race’ type features, two stages of progressive nitrous, water injection, closed loop boost control etc. Vehicle speed sensing, logging of EGT (with external hardware.)
In most configurations, the MS3 + MS3X +V357 can be used by setting a few configuration jumpers inside the box. It requires little or no DIY effort inside. (Other Megasquirt options are far more DIY intensive.)
Megasquirt-3 without MS3X
This gives all the software features of the full Megasquirt-3 but does not include the driver board to support 8 channel fuel and spark, relay outputs or switch or analogue inputs. Included is batch-fire fuel, SD card logging and USB-serial.
This option may be of use to the more DIY orientated user who wants to add their own options or as an upgrade from Megasquirt-1 or Megasquirt-2.