I'm about to buy an assambled (used) MS2 with v2.2 board. It's set up for the 420a and there's a wiring harness, serial cable and injector harness included. Now I'd like to know if it's a good idea to stick to the v2.2 board. Are there any downsides when using the 2.2 as full stand-alone?

Is tachometer output and fan control output a basic on these boards?

Compared to ms3x it's outdated but it will still tune your car. There's a megasquirt website that shows side by side comparison to ms2 and ms3 check it out.

Thanks for the advice, but I already found that page. My question was are there any downsides with the 2.2 board compared to to 3.00 and 3.57? All of them will work with the MS2 and MS3 Processor chip and obviously there are improvements, but will the 2.2 satisfy me when I want to use it as stand-alone?

Th3DooM said:

Thanks for the advice, but I already found that page. My question was are there any downsides with the 2.2 board compared to to 3.00 and 3.57? All of them will work with the MS2 and MS3 Processor chip and obviously there are improvements, but will the 2.2 satisfy me when I want to use it as stand-alone?

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That depends on what you are wanting to do with it. Maybe you can elaborate a little.

What's your goal? Hp, compression, drag, dd,?

I believe the MS3 chip only works on v3 as there was no MS3 out yet when v2.2 was the latest and greatest.

The car will stay a daily driver. I plan to boost it, but first I want to learn how to tune with MS. I'd also like to find a way to use the AC and cruise control without the factory pcm.

@dsmcrzy: yep, you're right.

v2.2 boards can be made to work with MS3. These are the main limitations of the v2.2 board:

• No PWM damping circuit, and a somewhat inadequate flyback clamp circuit (this is a problem if you plan on using low impedance injectors).
• Unprotected FP and FIDLE outputs.
• A less robust power supply.
• No VR input (this could be an issue if your engine will be revved high).
• No proto area (this makes installing optional circuits, like the tachometer output circuit, more difficult).
• No heat sink bar (this makes properly mounting the ignition drivers more difficult).

If you want things like a tachometer output, fan control output, and AC control, I recommend going with an MS3+MS3X system built on a v3.0 board from the get go.

Thank you! I guess I'll stick to a newer version.