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MegaSquirt 3

The MegaSquirt 3 (MS3) is ready to support a wide variety of engines out of the box, with the ability to control anything with one to eight cylinders with sequential fuel injection and sequential ‘coil on plug’ ignition, a V12 with semi-sequential fuel and wasted spark ignition, or a four rotor Wankel with separate leading and trailing ignition outputs. Over 50 different ignition modes are supported, from mainstream applications like the GM LS1, Ford Zetec, Bosch Motronic, and Chrysler Gen III Hemis to unusual modes like Renix Jeeps and the Suzuki Swift GTI. The 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.)

EPA, CARB & Emissions Disclaimer- All ECU's are for race purposes only. It's your responsibility to remain in compliance with all federal, state, provincial, or other laws that apply to you.

Showing 1–16 of 29 results

  • MegaSquirt-3 PCB3.0 UnAssembled Kit w/ MapDaddy4 Upgrade

    4.3333333333333 out of 5
    $539.99

    The MegaSquirt-3 PCB3.0 Kit with MapDaddy4 Upgrade is is a complete unassembled kit for building your own MegaSquirt-3 Engine Management System with a PCB Version 3.0 mainboard and upgraded MapDaddy4 (4-bar MAP sensor + barometric correction). It's ideal ...

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  • MegaSquirt-3 PCB3.0 UnAssembled Kit

    4.8888888888889 out of 5
    $449.99

    Build your own fully featured MegaSquirt-3 Engine Management System with this comprehensive unassembled kit. The MS330-K includes all essential components needed to assemble a complete MS3 ECU on a PCB Version 3.0 board — perfect for DIY enthusiasts and...

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  • MegaSquirt-3 Daughterboard Kit

    5 out of 5
    $229.99

    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 f...

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  • MegaSquirt-3 MS3X Expansion Card & Connector Kit

    4.8888888888889 out of 5
    $110.49

    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 ...

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  • MegaSquirt V3.0 PCB Components Kit

    $142.99

    This MSx30-Guts kit includes all the capacitors, diodes, integrated circuits, resistors, transistors, ECU connectors, the tube of heatsink compound and a bit of jumper wire in a Megasquirt V3.0 kit. The kit does not include the V3.0 PCB, case, endplates, ...

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  • 8′ MegaSquirt Wiring Harness (MS1/MS2/MS3 Ready)

    5 out of 5
    $119.99

    MegaSquirt Wiring Harness - 8 Feet Long We've completely redesigned our wire harness to help you get your fuel injection installation right the first time with several new features to help make your installation as easy and reliable as possible: ...

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  • 8′ MegaSquirt Wiring Harness for MS3X

    5 out of 5
    $129.99

    MegaSquirt MS3X Wiring Harness - 8 feet 8' of TXL High temp automotive grade wire. Color coded wiring with labeling printed on the wire every 6 inches -- no paper tags here! All wiring is pre-crimped (NOT solder cupped!) to the DB37 Heavy d...

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  • MegaSquirt 3X Wiring Bundle – 8′ long

    5 out of 5
    $74.99

    MegaSquirt MS3X Wiring Bundle - Length = 8' 8' of TXL High temp automotive grade wire. Color coded wiring with labeling printed on the wire every 6 inches -- no paper tags here! Use with MS3X Expansion board or other sequential device Just ...

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  • MegaSquirt Relay Board – Assembled Unit

    5 out of 5
    $264.99

    MegaSquirt Relay Board - Assembled Unit - Part# MSRelay-C Though the Relay/Power Board is not required, it is a convenience and can reduce the chance of miswiring during the installation. The relay board provides a central place for all of the required...

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  • 24″ MegaSquirt Pigtail Harness (MS1/MS2/MS3 Ready)

    5 out of 5
    $59.99

    MegaSquirt Wiring Harness - 24 inches long Completely redesigned version adds more features to help make your installation as easy and reliable as possible. We've now brought the improvements from the long harness over to the pigtail harness. This min...

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  • 24″ MegaSquirt Pigtail MS3X Harness

    $79.99

    MegaSquirt MS3X Wiring Pigtail - Length = 24" 24" of TXL High temp automotive grade wire. Color coded wiring with labeling printed on the wire every 6 inches -- no paper tags here! All wiring is pre-crimped (NOT solder cupped!) to the DB37 ...

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  • MegaSquirt Relay Cable

    5 out of 5
    $109.99

    High Quality 4' Relay Board cable for connecting your MegaSquirt ECU to your Relay Board. Works with MS1, MS2, or MS3, all standard main boards (includes not just the IAC and ignition pins - it also has the spare pins on 3 through 6). It has a shielded...

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  • MegaSquirt Wiring Bundle – 8′ Long

    4.2727272727273 out of 5
    $62.99

    MegaSquirt Wiring Bundle 8' TXL wire, color coded with labeling printed on the wire every 3 inches -- no paper tags here! IAC and Ignition wires are included for MS-1 / MS-2 use (or MS-3 Primary Harness use) Shielded Ignition input wire Gre...

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  • JimStim v1.5 MegaSquirt Stimulator with Wheel Simulator – Unassembled

    4.8 out of 5
    $80.99

    Use this board to test the MegaSquirt's inputs and outputs on the bench, before you install it on a car! The JimStim features a microcontroller which allows the simulation of up to 30 different toothed wheels, in addition to the standard distributor s...

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  • JimStim 1.5 MegaSquirt Stimulator with Wheel Simulator – Assembled

    5 out of 5
    $119.99

    DIYAutoTune Part# JimStim-C JimStim is essentially an engine simulator, a microcontroller which allows the generates up to 30 different toothed wheel signals, in addition to the standard distributor signal. Test your RPM input on the Stim, or tell the ...

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  • JimStimX Kit – MS3X Stimulator Expansion Board – Unassembled

    $51.99

    The regular JimStim can test the main board on your MS3. But what if you'd like to see the inputs and outputs on the MS3X expansion card in action, too? Now it's easy - just add a JimStimX! Use the three pull-off jumpers on the JimStim to connect the 5 vo...

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