wydra wrote:Ok I have decided to bite tthe bullet and get a megasquirt.
Can someone school me on whats what with these and the 2000 NB8A BP?
Is there much of a difference between the MS2 and MS3?
Massive difference. MS2 is more proven and plenty to read/learn by pople who've done it before. MS3 is the better/later hardware capable of much more than MS2, but for our cars (4cyl) there is really nothing in MS3 we need. Also, MS3 requires a more custom wiring to get the kit together as it isn't sold as an all-in-one kit like the DIYPNP. You may also struggle to find existing tunes for the MX5, but if you asked around on MiataTurbo I'm sure one of the locals would help you (if he doesn't eat you first for posting a newb question).
wydra wrote:I'm going to go with the DIYPNP kit, It sems most/all? are using the MS2 boards. Is this right? is this going to do everything i need of it?
That is correct. Lots more sold and people done that before. You should find it easier to get help or advice from folks who've done it on your model car before.
I don't believe you need the boost modkit, but the EBC solenoid is needed. Check with DIY themselves but I believe the DIYPNP already has the needed circuits to control a boost solenoid.
Definitely get a wide-band O2 sensor and controller. Almost impossible to tune the car without one. A gauge isn't needed, and unless you want to see the AFR whilst driving along (you should be looking at the road) skip this and buy something else (a good soldering iron).
wydra wrote:Is anything else required?
IAT Sensor? I don't see you mention it and you'll need an air temp sensor unless you plan to keep the existing MAF/AIT sensor. The reason you don't keep it is to free the intake track from the potential restriction. Also allows you to play with your own custom intake pipe without having to work out how to include the Mazda MAF/AIT.
MAP Vacuum tube - about 3-4 metres of good quality 4mm pipe
Tools needed to assemble and time to do it properly.
wydra wrote:Is anything else recommended?
Think about how you'll remove the MAF sensor and how you'd add the IAT sensor to the intake pipe. Good time to plan for that and think about needed joiners, bends and where it will get fresh/cool air.
wydra wrote:Can the Alternator Voltage Regulation circuit parts be bought as a kit? or do i need to buy the parts seperate and I have to construct in the 'proto' area by myself?
It seems it needs to be built in the proto area, but some have also found old Chrysler voltage regulator circuits from junk yards and/or other donor cars to control this. I've been thinking of how to add that capability to the MS2 software, as essentially if the OEM ECU can do it, with the right spare output, I could write the software to do the same. Just not sure what the input/output conditions are and what other circuits are needed to control the alternator - maybe someone knows if it is as simple as just GNDing the alternator wire when the 12V charge it too low.
The other final option is to look at the DIY PNP2 kit for your model. Kit is assembled and has the needed voltage regulation circuitry done. A bit more upfront cost, but if you factor in your time, it probably is cheaper. Don't get the "I built it" feeling, but still a lot of DIY work to install compared to walking into a store and laying down some cash and picking it up later!
G
