I started my Megasquirt build this week. I have been reading for the last few months and decided the MS3x was what I wanted for my '99 nb. I figured I could start a thread to fill in some of the gaps for anybody else thinking about MS3x DIY.
I am still a little in the dark because it is hard to wrap your head around all of the variables associated with inputs and outputs without a finished MS in front of you. For now I am following Frank's (Westfield MX-5) amalgamated instructions on his blog. I am sure that once I have the built board in front of me and I am trying to make it work, some modification/repair will be necessary.
I ordered the parts listed on Frank's build info page. I didn't realize the price of the MS had been slowly creeping upwards. Still a great deal for the money.
Do I need the STIM? I have fancy multimeters, oscilloscope, and a variable power supply- is that enough to fake the signal for testing?
I also bought an Innovate Motorsports LC-1 w/gauge. I will buy tunerstudio when this thing is together.
Ran into my first problems though. I ordered the closed element IAT, which won't work for me. Also, the MS3 doesn't ship with any wire to make a harness, not a big deal but for those placing orders buy some wire while it is convenient. I am going to copy the Tyco connector in the box PNP. Bought the connector from onlinecomponents.
I am still on the first couple steps of building. I am sure I will run into problems soon enough. I'll post them here. The alternator circuit may be challenging to fit in the smallest space possible on the proto area. I will be working on it a couple hours a night after work so it should be done by the end of next week, hopefully.
One more question, on the instructions it says U5 should be mounted with a plastic screw, but later the MS3x gets mounted to this spot using a metal screw+standoff? Can anyone who has been there before shed some light on this?