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MegaSquirt-III with PCB V3.0 - Unassembled Kit
MegaSquirt-III with PCB V3.0 - Unassembled Kit
MegaSquirt-III with PCB V3.0 - Unassembled Kit
MegaSquirt-III with PCB V3.0 - Unassembled Kit
MegaSquirt-III with PCB V3.0 - Unassembled Kit
MegaSquirt-III with PCB V3.0 - Unassembled Kit

MegaSquirt-III with PCB V3.0 – Unassembled Kit

5.00 out of 5 based on 2 customer ratings
(2 customer reviews )


In stock


Included is a MegaSquirt-III Engine Management System w/PCB3.0 – Unassembled Kit Part # MS330-K

This MS330-K_BL kit includes everything you will need to build your MegaSquirt-3. The genuine B&G partial kit with V3.0 PCB, everything in the standard Bill Of Materials, the MS3 daughter board kit, the case, pre-machined endplates and heatsink bar, even the tube of heatsink compound and a bit of jumper wire is included. All you add is tools, solder, and time! The MS3X Xpander board is sold separately and allows you to fully take advantage of the MegaSquirt-3, including 8cyl sequential injection, 8 ignition outputs allowing 8cyl coil on plug, nitrous control, and more.  Add a tuning cable to your order if you don’t have one already. 

MS330-K Kit Bill Of Materials (BOM) Includes:

  • MS3 Daughter Card
  • All ‘Basic Components’, including 2.5 bar MAP sensor
  • PWM Flyback Damping Circuit components
  • Hall Sensor/Coil(-) and VR Sensor Ignition Trigger Components
  • Single Bosch BIP373 High Current Ignition Driver Components
  • Current Limiting Circuit Components

The MS3 daughter card on its own will give you all these features and more:

  • VE and ignition tables are now both 16 x 16
  • 0.1% steps on VE table, 0.1 degree steps on ignition table
  • Socket for an onboard SD card – no laptop required for data logging  (SD Card not included)
  • Built in USB port
  • GM stepper IAC control
  • Closed loop idle and mixture control
  • CANBus communications for interface with GPIO Board, IO Extender, or other devices
  • Staged injection
  • Native support for many different OEM trigger patterns

The MS3 also gives you a starting point for even more expansion. You will be able to connect the headers on this board to additional hardware, such as the MS3X board to enable features like these:

  • 8 channels sequential fuel control
  • 8 channel sequential ignition control
  • Individual fuel and spark trim for cylinder by cylinder tuning
  • 2 and 3 channel PWM IAC control
  • 2 stage nitrous controller
  • Table switching for multi-fuel engines
  • 2 step launch control
  • And more!

For complete MS3 documentation, see ms3efi.com.


Customers' review

Rated 5.00 out of 5 stars
2 reviews
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2 reviews for MegaSquirt-III with PCB V3.0 – Unassembled Kit

  1. 5 out of 5

    My truck has been up and running on a MS3X system 6 months now. I bought the unassembled kit and put it together with no issues other than my eyes not being as good as they used to be - I had to buy a lighted magnifier to do the soldering. The kit is very well marked and documented and well worth the effort.

    Was this review helpful to you? 8 of 8 people found this review helpful

  2. 5 out of 5

    even thow I’ve been a real pain in communications, Matt and DIY Autotune were great in answering and helping in getting the package delivered in time for further shipping to NL,
    now to get it in my hands and put it together, can’t wait to start using my crabs as a doorstop…..

    Was this review helpful to you? 0 of 1 people found this review helpful

Add a review

What inputs and outputs are provided with this kit?

  • It includes the circuitry needed to connect to the following sensors and outputs:
    • Coolant temperature
    • Intake air temperature
    • 2.5 bar MAP sensor (onboard)
    • Oxygen sensor - narrow band or wideband with external controller
    • Throttle position sensor
    • On/off fast idle valve
    • Stepper fast idle valve
    • 2 injector output channels
    • Tach input - Hall effect, optical, or VR sensors supported
    • Single direct coil control spark output
    • Onboard data logging
  • Adding an MS3X expansion card will add sequential injection, eight logic level spark outputs, and more.

I've seen a mention of an MS3 Daughter Card. Do I need to order that separately?

  • No. The MS3 daughter card is included as part of this kit.

Does this kit include a MAP sensor?

  • Yes, there is a 2.5 bar MAP sensor included. It is a small UFO-like item in a static resistant bag and will not look like a conventional GM MAP sensor.

What firmware does it have?

  • The daughter card ships without firmware. You will load firmware during assembly.

Questions & Answers

  1. 0 votes

    MS3 solves this problem by using six individual spark outputs and skipping the two EDIS modules.

  2. 0 votes

    Yes, the MS3 can run this engine - including VANOS with the right mods. You will need to convert to a cable operated throttle body, and if using the BMW coils, you'll need a pair of QuadSpark ignition modules.

  3. 0 votes

    TunerStudio Lite is a free download, available at this link. You can purchase the registered version from the TunerStudio site at the "Register Online Now" page. Currently, only ECUs in the MS3Pro family (MS3Pro EVO, MS3Pro Ultimate, and MS3Pro PNP) include the registered version; for all other ECUs, this is sold separately.

  4. 0 votes

    Yes. It would communicate with the MicroSquirt over the CAN bus. You just need to run two wires during assembly to bring the CAN connection to the DB37 connector.

  5. 0 votes

    You will need to add the MS3 knock module kit to best make use of a knock sensor, and I would also recommend the MS3X expansion board. The MS3 also supports vehicle speed sensor input.

  6. 0 votes

    We include a solder cup DB37. The RS232 and USB cables are sold separately - as an off the shelf cable is fine for the communication side of things, we don't sell solder cup DB9 or USB connectors.

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