MegaSquirt 1 EMS Kits & Components

MegaSquirt 1

MegaSquirt 1 (MS1) offers a cost effective entry level to the aftermarket ECU market. Coupled with an EDIS module, the MegaSquirt 1 V2.2 offered excellent value for money mappable spark and fuel. For direct coil control (non-EDIS) the MegaSquirt 1 V3.0 is still a cheap and simple ECU. As expected MegaSquirt 1 lacks many of the features of the newer ECUs. Few OEM wheel patterns are supported, temperature sensor and wideband calibration is more tricky and there are fewer diagnostics. All features require DIY modifications to the circuit board.

If you’re looking for more full featured engine management systems we suggest you look at our MegaSquirt 2 and MegaSquirt 3 kits which provide many more features but maintain an affordable price point for total fuel injection and ignition tuning.

Showing all 14 results

8′ MegaSquirt Wiring Harness (MS1/MS2/MS3 Ready)
5 out of 5
$83.00
MegaSquirt Wiring Harness - 8 Feet LongWe'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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MegaSquirt-I Programmable EFI System PCB2.2 – Kit
5 out of 5
$197.00
*This product or components that make up this product have reached End of Life. Once the remaining quantities are purchased, this product will be discontinued.MegaSquirt-I with V2.2 Main BoardMegaSquirt programmable EFI Engine Management System ...
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MegaSquirt-I Programmable EFI System PCB3.0 – Kit
5 out of 5
$254.00
Part # MS130-K; MegaSquirt-I Programmable EFI System with V3.0 main board - Unassembled Kit with Black CaseImportant Note: The BIP373 coil driver is sold separately and is only required for direct coil control. If you are using coils with internal or ...
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MegaSquirt Tuning Cable (DB9 Straight Thru)
$5.50
DB9 6' Male/Female Straight thru cable for tuning and testing your MegaSquirt ECU.
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MegaSquirt Relay Board – Unassembled Kit
3.6666666666667 out of 5
$94.00
MegaSquirt Relay Board - UnAssembled Kit Part # MSRelay-KIncludes everything you will need to build your MegaSquirt Relay Board, complete with black anodized case.Though the Relay/Power Board is not required, it is a convenience and reduces the ch...
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MegaSquirt Relay Board – Assembled Unit
5 out of 5
$115.00
MegaSquirt Relay Board - Assembled Unit - Part# MSRelay-CThough 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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MegaSquirt Wiring Bundle – Long
4.1428571428571 out of 5
$48.00
MegaSquirt Wiring Bundle8' 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-I / MS-2 use (or MS-3 Primary Harness use) Shielded Ignition input wireGrea...
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JimStim v1.5 MegaSquirt Stimulator with Wheel Simulator – Unassembled
4.7 out of 5
$80.00
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
$120.00
DIYAutoTune Part# JimStim-CJimStim 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 Expansion Board – Unassembled
$52.00
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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CPU – MegaSquirt-I CPU
$37.00
MegaSquirt-I CPU; Motorola 68HC908 microprocessor loaded with standard B&G MegaSquirt-I firmware version 3.0. This part is discontinued and available while supplies last.For use with any MegaSquirt PCB version 1, 2.2, 3.0, 3.57...
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Jumper 10-Pack
5 out of 5
$7.49
10-pack of wire jumpers in 5 colors. These fit 0.1" headers and are used on the JimStim to make connections for testing additional circuitry. There are several other uses for them too.
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Zeal Engineering Daughterboard with Dual VR Conditioners
$42.00
The Zeal Engineering Daughterboard was designed and developed by Ken Culver, one of the authors of the MS2/Extra and MS3 firmware. We're proud to now offer this daughter card in kit form. It was originally developed for the FC RX-7, but we have found it...
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MegaSquirt Flyback Board Kit (for PCBv2.2 ECUs)
$42.00
Includes everything you will need to build your MegaSquirt Flyback board using the case as the heat sink.MegaSquirt (PCB2.2) users running a number of very low impedance injectors have reported problems with the flyback circuit failing. Typically, thi...
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