I'm interested in changing my 91 miata over to megasquirt to ditch the afm and maybe pick up a bit of power. There is a local seller trying to move a PNP for $500 which is a good amount off of the retail. Is that actually a good deal? Should I hold out for the often mention MSIII? The seller has been sitting on the PNP for some time as he was trying to sell it several months back with a turbo kit that he was selling.
MS3 is badass, but you'll be waiting until May-ish from what I'm hearing. PnP obviously makes the wiring a non-issue so it's a good start for someone that already has good wiring in the car and can just plug, tune and go. Unless there's something MS3 specific that you need, it sounds like you might have found a good deal.
Can't you upgrade to the MS3 later anyway? I thought MS3 was just a drop in or is that only on the non PnP's?
The MS3 expansion board doesn't fit in the MSPNP case without Sawzall work. I tried.
You do not need the full expansion board to upgrade to MS3. You can pull out the MS2 chip, and replace with MS3 chip and that gets you a lot of the functionality.
The expansion board gets you support for full sequential, etc, etc.
Not sure if the PnP is MS1 or MS2, if it's MS1 there are more changes required.
http://www.msextra.com/doc/ms3/upgrade.html
I seem to remember someone saying on the MS3 forums that the upgrade would be a coupe hundred bucks...
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