MegaSquirt-I Programmable EFI System PCB2.2 – Kit

While it is possible to make this kit work with enough determination, it would require assembling a lot of extra circuits using a breadboard or Zeal daughter board to add a conditioner for the BMW crank sensor. An MS1 V3.0 kit would offer this conditioner already built in, and a more robust circuit board. You could then add outputs to drive the coils using our BIP373 mod kits; the BIP373 transistor is in the same family as the coil drivers used in stock BMW DMEs from this era.

Stepping up to an MS2 V3.0 kit would give you a more powerful processor, more accurate spark timing, and settings that are easier to configure, while going to an MS3 V3.0 kit would allow sequential injection and a massive amount of I/O when using the MS3X expansion board. These features may be more "nice to have," while using a V3.0 board over a V2.2 is going to save a lot of headaches for this particular application.

The V3.0 would be a better starting point, as it was designed for ignition control. From looking at the wiring diagrams, it appears that it should be possible to use a V2.2 on this engine, but the V2.2 will have fewer upgrade options if you want to run a different ignition later or decide you want to upgrade to MS2 or MS3.

Yes, although you will need to install the modifications in our "How to MegaSquirt Your Miata" guide.

The official documentation is in English, but there is an unofficial French support forum here: https://forum.megasquirt.fr/

Please contact us with complete details about the ignition system this car runs, and we can check if this unit is suitable. In many cases, it can be better to step up to a V3.0 board, as they have better ignition support.

I do not recommend using a V2.2 board on a distributorless ignition. At a minimum, I would recommend an MS1 V3.0 kit, although it's not much more to step up to an MS2 V3.0. The MS2 is considerably easier to configure and tune.

This can work if you are using a Hall effect distributor with a four vane rotor. For other VW ignition systems, I'd recommend stepping up to at least a V3.0 board.

This kit can be modified for logic level spark outputs, but the MS2 will do a much better job of handling a 2JZ cam / crank sensor arrangement. Adding the necessary changes to support ignition control can make an MS1 V2.2 more expensive than some of more advanced kits - and often a more complicated project. The MS1 V2.2 kit works fairly well with a couple of specific ignitions:

• Mazda Miata
• Ford TFI distributor
• GM HEI distributors
• Ford EDIS
• And a couple stock VW distributors

For most other ignitions, we typically recommend stepping up to at least an MS1 V3.0 and maybe further, depending on the exact details of the build.

This isn't the kit I would pick for a '99 Miata; supporting the factory sensors would require something MS2 based, such as the MS2 V3.0 or DIYPNP. These two options have native support for your car's ignition. You would then need to dial in the fuel and ignition tables for what your specific build needs.

An MS1 V2.2 would not be my first choice for ignition control unless this engine uses a 7 or 8 pin GM HEI module. If it uses a more complicated ignition, you may need to step up to an MS1 V3.0 or even an MS2 V3.0 depending on the engine's specific needs.