Yep. It's an open source sort of project, with lots of hands helping improve it. It can be a bit confusing at time because there are so many options of what to do with it. It consists mainly of a cumputer controller that you could either build yourself (parts are about $120 or so) or have built (usually about $250 - 300). Then you can talk to it using Windows or Linux software and set all sorts of parameters. People keep coming up with new versions of the software that runs on the MS box and the software that talks to it on windows, adding new features and functions. Originally it was fuel only, now it also does spark too (in many different flavors).

Basics include an 8X8 (or 12X12 depending on version) table of fuel values with RPM on one side and manifold air pressure on the other. Spark has a similarly sized table by RPm and MAP.

Unlike the D-Jet computer this can bet programmed to use almost any type of hardware - injectors or sensors. It can handle feedback from narrow or wide band O2 sensors should you add one. If you add boost of some sort to the engine, it will handle that too (most of them come with an MAP sensor that goes up to 2.5 bar).

All in all you can fine tune it to as great a degree as you want to - no swapping of expensive little Weber bits, no dark mystery of what effect at different conditions each little carb part has. Lots of people yank the OEM computers of new cars and plug in an MS too - merely because OEM comuters are sealed black boxes, but the MS is open and completely programmable.

Heck, once I get it installed on my PV I can have things like traction control and rev limiters.
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I'm JohnMc, and I approved this message.