wannafbody

iTrader: (1)

A friend was telling me about Microsquirt, is that a viable option for a 4 cylinder Miata? What are the downsides compared to Megasquirt?

Braineack

iTrader: (62)

everyone with a DIYPNP runs microsquirt.

shlammed

iTrader: (8)

Downside is that it requires wiring in.

It is what I will be using on my full race miata buildwhere iI'm rewiring the whole car.

wannafbody

iTrader: (1)

Does a microsquirt come with a base map installed?

dieselmiata

iTrader: (3)

No, you have to load it just like a PNP MS. Functionality is close enough that I've never given any though to the fact I'm running a Microsquirt module.

richyvrlimited

iTrader: (1)

Microsquirt is a MS2 in an easy to package SMD board.

If you bought just the uS board there will just be the default .msq on it, no basemap.

Ben

iTrader: (33)

Essentially true. The Microsquirt EMS uses the same processor as MS2, but to save space (for packaging), Microsquirt does not support low impedance injectors or stepper idle control. I don't see low impedance injectors used commonly in Miatas, and Miatas don't have stepper idle valves, so this is probably not a big deal. However Microsquirt V3 does use the MAX9926 "smart" signal conditioner on both crank and cam inputs, just like MS3-Pro. Some would consider that a big step up.
Otherwise, Microsquirt is pretty much a smaller, lighter, better sealed version of MS2.