MS3 Pro ECU

The MS3-Pro combines all of the standard and optional features of our standard MS3 systems, including sequential fuel injection and ignition, knock sensor support, SD data card logging, USB and RS-232 interfaces, and more. It features automotive-grade, waterproof connectors and a high temperature nylon case. For harsher environments, the case can be completely submerged by sealing its seam with silicone.

Like our standard MS3 systems, the MS3 Pro supports a large number of applications. The universal crank and cam inputs, in addition to the many fuel and ignition outputs, mean the MS3 Pro supports everything from single cylinder scooters to twelve cylinder tractors!

The MS3 Pro includes a CD with the tuning software and documentation. All tuning cables are included with the 8' harness option. The MS3 Pro requires an external MAP sensor, which is sold separately.

The MS3 Pro boasts the following features:

• 16x16 fuel tables and 16x16 ignition tables
• Fuel injector control precise to 1 µsec
• Full ignition control
• 0.1% VE table resolution and 0.1 degree ignition table resolution
• Individual cylinder trims for fuel and ignition
• Fuel cut and/or spark retard based rev limiter
• Wideband oxygen sensor AFR target table
• Dual independent fuel and AFR target tables
• Active exhaust gas oxygen feedback control
• Various barometric correction schemes
• User configurable TPS and MAP based open-loop thresholds
• User configurable TPS and MAP based acceleration enrichment
• On/off, PWM, and stepper motor IAC support (additional hardware may be necessary)

• 50 MHz 16-bit dual core processor
• 1 Universal (Hall, opto, VR) crank sensor input
• 1 Universal (Hall, opto, VR) cam sensor input
• 10 Independent fuel injector drivers, with support for sequential fuel injection
• Injector drivers can drive high impedance injectors directly, or low impedance injectors with inline resistors
• 8 Independent ignition outputs, with support for sequential ignition
• Ignition outputs are compatible with many ignition modules and "smart" coils with internal ignitors
• 3 High current outputs for relays, solenoids, or fuel injectors
• 3 Medium current outputs for relays and solenoids
• Medium current outputs support various firmware features, such as two stage nitrous control, boost control, and more
• 3 Analog inputs for adding extra sensors
• 4 Digital inputs for switches and pulse inputs
• 2 Knock sensor inputs
• Real time clock
• Internal temperature sensor
• Speed density, alpha-N, and MAF algorithms
• Compatible with narrowband oxygen sensors and most wideband oxygen sensor systems
• USB or 115,200 baud serial connection for tuning
• CAN bus for virtually unlimited expansion
• SD card data logging (8GB SD card included)
• Custom molded nylon enclosure

• Tuning software (TunerStudio MS) is regularly updated, and free to download and use
• Log data on your laptop with TunerStudio MS, or on your Android phone with Shadow Logger MS

All MegaSquirt systems are NC/NR.