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MegaSquirt-3 MS3X Expansion Card & Connector Kit
MegaSquirt-3 MS3X Expansion Card & Connector Kit
MegaSquirt-III MS3X Expansion Card
MegaSquirt-III MS3X Expansion Card
MegaSquirt-3 MS3X Expansion Card & Connector Kit

MegaSquirt-3 MS3X Expansion Card & Connector Kit

4.8888888888889 out of 5 based on 9 customer ratings
(9 customer reviews)

$149.99

SKU: MS3Xpander Category: Tags: , , , , , , , , , , , , , Brand:

Description

Unlock the full capabilities of your MegaSquirt-3 ECU with the MS3X Expansion Card & Connector Kit. This plug-and-play expansion board installs directly inside your MS3 case — no soldering required — and connects via the included ribbon cables to your existing MS3 daughter card.

Whether you’re looking to run full sequential injection, staged nitrous, or multiple ignition outputs, the MS3X makes it simple with pre-configured circuits and a seamless TunerStudio setup experience.


Key Features – Adds the Following I/O to Your MS3 ECU:

  • 8 Sequential Fuel Injection Outputs

    • Drives high-impedance injectors

    • Unused outputs can be reassigned for auxiliary control

  • 8 Logic-Level 5V Ignition Outputs

    • Compatible with LSx coils, IGN-1A coils, and other smart ignition systems

    • Requires coils with internal ignitors or external ignition modules

  • 6 Medium-Current Outputs

    • Ideal for:

      • Boost control

      • 2-stage progressive nitrous

      • Tach output

      • 2- or 3-wire PWM idle control

      • General-purpose relay or PWM control

  • 3 Analog Inputs

    • Perfect for logging:

      • External MAP sensor

      • Secondary O2 sensor

      • Fuel pressure

      • Accelerometer

      • Other custom sensors

  • 4 Digital Switch Inputs

    • Use for:

      • Launch control

      • Data logging trigger

      • Nitrous arming

      • Table switching

      • VSS input (with external signal conditioning)

  • 1 Cam Sensor Input

    • Compatible with VR, Hall, or optical sensors


Installation & Compatibility:

  • No soldering required – connects via included ribbon cables

  • Designed for use only with the MegaSquirt-3 daughter card

  • Fully supported by TunerStudio for easy configuration

  • Compact form factor fits cleanly inside the MS3 ECU case


What’s Included:

  • 1 × MS3X Expansion Board

  • Ribbon cables for plug-in installation

  • Header connectors

Customer reviews

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9 reviews for MegaSquirt-3 MS3X Expansion Card & Connector Kit

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What advantages are there to adding the MS3X to the MS3?

  • This is the easiest way to add the extra I/O allowed by the MS3 processor. Without the MS3X, an MS3 will be like an MS2 except for adding data logging and a faster processor. This card allows using the MS3 to its full potential.

Where is this board made?

  • It is built in the USA.

Questions & Answers

    with this expansion card, do you still need the MS3 knock module kit or can it be wired in directly?
  1. 0 votes
    Q with this expansion card, do you still need the MS3 knock module kit or can it be wired in directly?
    Asked by Kendel
    A

    The knock module solders to the white MS3 daughter card. You can use it with or without the MS3X board, although without the MS3X board you will have a limited number of spark output options.

  2. How do you output 12 ignition and 12 fuel this is on jaguar v12
  3. 0 votes
    Q How do you output 12 ignition and 12 fuel this is on jaguar v12
    Asked by Nigel Barton
    A

    Please see section 3.6.3 of the MS3X V3.0 hardware manual for how to configure this ECU for V12 sequential support.

  4. will i get A/C idle up control with the expansion card?
  5. 0 votes
    Q will i get A/C idle up control with the expansion card?
    Asked by Kender
    A

    Yes, this card has the needed inputs and outputs for using the MS3's A/C control functions.

  6. can the ms3x tach output drive an autometer tachometer directly? or is there modifications needed to do this?
  7. 0 votes
    Q can the ms3x tach output drive an autometer tachometer directly? or is there modifications needed...... Read more
    Asked by Andrew
    A

    Most aftermarket tachs will have no problem with the signal. Only a few older tachs (particularly OEM units) driven off the coil will have a problem.

  8. It states that it will control 8 outputs for ignition and fuel, but it can handle 6 without a problem or will it only handle 8?
  9. 0 votes
    Q It states that it will control 8 outputs for ignition and fuel, but it can handle 6 without a pro...... Read more
    Asked by Jon Hoellerich
    A

    6 is no problem. Any unused fuel or ignition outputs can be turned off in software or repurposed for other uses.

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