I've been wanting to do the MS2 for sometime now and finally pulled the plug. The easy part of the msextra manual is done. The board is now looking like this:



Now the fun part. As I understand, for a 99 build, the ms2 need to be setup to control:

Alternator
VCIS
Fans
Cam and crank inputs.

Since everybody has now switched to MS3, a lot of the MS2 thread picture links are getting broken and it is quite difficult to extract the good info out of it.

For now, the most relevant alternator circuit i found is this:



And the best Cam and crank input circuit is this:



I was going to use middle led to control the fan relay as described here:

Megasquirt 2 Mod Kits - Miata Turbo FAQ

And the MK-RelayCtrl I bought for the VCIS.

Next thing wil be to configure the board for PWM IAC with the MK-PWMIAC kit.


Is that about right? Are there better/simpler circuits tu use? Does somebody have a picture of the final thing assembled for reference to manage Proto space?




Thank you

David

 

return the ms2 cpu and case, buy a ms3 and expander board and ms3 case.

but there's no reason you cant use the opto and VR circuits for the crank/cam.

 

Let's say I keep the MS2. Whitch would be the right way to use the opto circtuit for the cam sensor?

5.2.14.2 hall sensor / optical sensor
5.2.14.3 hall or logic sensor
5.2.14.4 ground switching

 

goto this link it has a simple circuit Megasquirt Ii Opto Input Circuit - Forced Induction & N/A Power Mods - MX5Nutz Forum

 

I've got a 99, I need VR for 4 tooth crank wheel and opto for cam sensor. This circuit seems to be for a NA miata with CAS.

 

That link was if you were using the opto for crank and then built a second opto for cam. I don't like building extra circuits if possible.

see post 28-30 here: https://www.miataturbo.net/megasquir...t-83247/page2/