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 23 results
MS130-K Kit with MapDaddy4 Upgrade
MS130-K kit with MapDaddy4 upgrade. Just like the regular MS1 V3.0 kit, but we've replaced the 2.5 bar MAP sensor with the MapDaddy4 to let you read up to 44 psi of boost instead of 21 psi.
Learn More →$274.00
MegaSquirt-I Programmable EFI System PCB3.0 – Kit
Part # MS130-K; MegaSquirt-I Programmable EFI System with V3.0 main board - Unassembled Kit with Black CaseThe MS130-K kit includes everything you will need to build your MegaSquirt ECU. The genuine B&G partial kit with PCB3.0, the Bill Of Materia...
Learn More →$219.00
MegaSquirt-I Programmable EFI System PCB2.2 – Kit
MegaSquirt-I with V2.2 Main BoardMegaSquirt programmable EFI Engine Management System from Bowling and Grippo. Install fuel injection on anything from a single cylinder lawnmower engine to a fire breathing V12, and anything in between! This kit is eas...
Learn More →$169.00
MegaSquirt Relay Board – Unassembled Kit
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...
Learn More →$73.00
MegaSquirt Relay Board – Assembled Unit
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...
Learn More →$99.00
10′ MegaSquirt Wiring Harness (MS1/MS2/MS3 Ready)
MegaSquirt Wiring Harness - 10 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:...
Learn More →$79.00
MegaSquirt Relay Cable
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...
Learn More →$85.00
JimStim v1.5 MegaSquirt Stimulator with Wheel Simulator – Unassembled
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...
Learn More →$59.00
MegaSquirt Stimulator v2.2 – Assembled Unit
MegaSquirt Stimulator Board v2.2 - Assembled Unit Part # MSStim22-C(For all versions of the MegaSquirt, PCB 2.2, 3.0, and the newer surface mount 3.57 boards)The Stimulator board allows you to fully bench-test all standard inputs and outputs on yo...
Learn More →$69.00
MegaSquirt Tuning Cable (DB9 Straight Thru)
DB9 6' Male/Female Straight thru cable for tuning and testing your MegaSquirt ECU.
Learn More →$5.50
MSPNP Gen 1 Tune Cable
Lost the tune cable to your MSPNP Gen 1 (the version with the white box)? Here is a replacement.NOTE: Gen 2 and MSPNP Pro units use either the TuneCable6, except for the Ford ones, which use the Innovate cable.
Learn More →$15.00
DIYAutoTune Braggin’ Rights T Shirt- Black
'Official' DIYAutoTune Braggin' Rights T Shirt; Various sizes available in black.Have you built your own MegaSquirt and begun leaving others in the dust? Now, you can brag about it! Tell others "I built my own standalone engine management system,...
Learn More →$18.00
Circuit Breaker – 150 Amp
150 amp circuit breaker. This is a sealed, marine grade unit with a reset lever. 3/8" lugs for ring terminal attachments. Manual trip/reset lets you activate the breaker with the blue push button. Maximum voltage 48 volts DC. Made in the USA.
Learn More →$40.00
MegaSquirt Wiring Bundle – Long
MegaSquirt Wiring Bundle10' 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 wireGre...
Learn More →$46.00
MegaSquirt Wiring Bundle – 23″ Long
MegaSquirt Wiring Bundle - 23" LongPerfect for creating your harness adapter (perhaps using a DIYBOB along with this) or for tying into your stock wiring harness!23" TXL wire, color coded with labeling printed on the wire every 3 inches -- no p...
Learn More →$15.00
MegaSquirt Stimulator v2.2 – Unassembled Kit
MegaSquirt Stimulator Board v2.2 - Unassembled Kit; Part # MSStim22-K (For all versions of the MegaSquirt, PCB 2.2, 3.0, and all surface mount 3.57 boards)The MSStim22-K includes all the parts you need to build a Megasquirt Stimulator version 2.2 as...
Learn More →$45.00
Weather Pack Pin Removal Tool
This tool makes de-pinning Weather Pack connectors a simple snap or poke.Just pop the seal retainer off, poke the tool in from the terminal side, slipping the tool over the terminal all the way in to release the latch, and pull the wire out from the...
Learn More →$4.95
MS Relay and Power Board – Case and Endplates
Case with Flanged Endplates Machined for MegaSquirt Relay BoardPart # EAC-Rel-CEPBlack anodized aluminum case with endplates custom machined for a perfect fit!
Learn More →$23.00
Zeal Engineering Daughterboard with Dual VR Conditioners
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...
Learn More →$35.00
DB37 Metalized Plastic Backshell
This is the 937GME-ND metalized plastic backshell cover included in our basic Megasquirt kits. It's not the same as the massive AMP metal cover used on our harnesses (that's sold on its own under wiring components), but it is cheap and effective if you're...
Learn More →$2.23
DB37 Solder Cup Connector
DB37 female solder cup connector, as included in our Megasquirt and relay board kits. Use this if you're making a new harness and prefer a soldered connection. This is the connector only; the backshell is sold separately.
Learn More →$2.29
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.
Learn More →$7.00
MegaSquirt Flyback Board Kit (for PCBv2.2 ECUs)
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...
Learn More →$36.00