MegaSquirt-3 Daughterboard Kit is to upgrade your existing MegaSquirt system to the latest in engine management technology with the MS3 Daughterboard Kit. This kit makes it easy to upgrade from MS1 or MS2 to MegaSquirt-3, providing advanced features and future expandability while retaining your existing V3.0 or V3.57 mainboard.

What’s Included:

• 1 × MS3 Daughterboard

• 2 × 40-pin stacking sockets (required for compatibility with MS3-ready cases that have cutouts for USB and SD card access)

Upgrade Compatibility:

• Direct drop-in replacement for MS2 daughterboards

• Compatible with genuine B&G V3.0 and V3.57 PCBs

• Cases must be MS3-compatible to support the USB and SD card interfaces

• If upgrading from MS1, additional jumpers may be needed, and I/O pin adjustments may be required

• Not recommended for V2.2 boards due to mechanical and documentation limitations

⚠️ Note: MS3 daughter cards are designed for use only with genuine Bowling & Grippo MegaSquirt mainboards.

Built-In MS3 Features:

• 16 × 16 VE and ignition tables for high-resolution tuning

• Fine control with 0.1% fuel steps and 0.1° ignition steps

• Built-in USB port for easy communication

• Onboard SD card slot for laptop-free data logging (SD card not included)

• GM stepper IAC support

• Closed-loop idle and mixture control

• CANBus communication for use with GPIO boards and I/O expanders

• Staged injection

• Native support for many OEM trigger patterns

Expandable with MS3X (sold separately):

• 8-cylinder sequential fuel and ignition support

• Per-cylinder fuel and spark trim

• 2-3 channel PWM idle air control

• 2-stage nitrous control

• Table switching for multi-fuel support

• Launch control and more