Megasquirting my stock '99 NB - the wiring
#1
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Hello all,
Continuing from my previous thread, I'm going to go with an MS-I v3.57 board running in parallel on my '99.
I have some free time coming up, so I'm going to tackle the install in about a week.
However, I'm still a bit unclear on the wiring. I've read Braineack's guide, but I'm still struggling with a couple of things.
First, how do I determine which leads on the boomslang should be wired to the megasquirt pigtail?
For example, I can see in the images on Braineack's guide that pin 37 on the DB37 connecctor is for the fuel pump, but I don't see where I get that signal from the '99-00 ECU pinouts.
Second, how do I wire the '94-97 CAS? I see pinouts listed on Braineack's guide. When I buy the CAS, do I need to get a wiring harness for that as well, and pass it all the way through the firewall to the megasquirt piggy?
Continuing from my previous thread, I'm going to go with an MS-I v3.57 board running in parallel on my '99.
I have some free time coming up, so I'm going to tackle the install in about a week.
However, I'm still a bit unclear on the wiring. I've read Braineack's guide, but I'm still struggling with a couple of things.
First, how do I determine which leads on the boomslang should be wired to the megasquirt pigtail?
For example, I can see in the images on Braineack's guide that pin 37 on the DB37 connecctor is for the fuel pump, but I don't see where I get that signal from the '99-00 ECU pinouts.
Second, how do I wire the '94-97 CAS? I see pinouts listed on Braineack's guide. When I buy the CAS, do I need to get a wiring harness for that as well, and pass it all the way through the firewall to the megasquirt piggy?
#2
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Grab the 99 wiring pdf from http://www.madracki.com/miata/wiring.html and use that to get what pin number you need. Then use this diagram to find its position on the connector (most of the stuff you need is already marked anyways)
![](http://i28.tinypic.com/ivyhdu.jpg)
And dont bother with the cas...you can mod your stock crank wheel and use that.
![](http://i28.tinypic.com/ivyhdu.jpg)
And dont bother with the cas...you can mod your stock crank wheel and use that.
#3
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![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Hello all,
Continuing from my previous thread, I'm going to go with an MS-I v3.57 board running in parallel on my '99.
I have some free time coming up, so I'm going to tackle the install in about a week.
However, I'm still a bit unclear on the wiring. I've read Braineack's guide, but I'm still struggling with a couple of things.
First, how do I determine which leads on the boomslang should be wired to the megasquirt pigtail?
For example, I can see in the images on Braineack's guide that pin 37 on the DB37 connecctor is for the fuel pump, but I don't see where I get that signal from the '99-00 ECU pinouts.
Second, how do I wire the '94-97 CAS? I see pinouts listed on Braineack's guide. When I buy the CAS, do I need to get a wiring harness for that as well, and pass it all the way through the firewall to the megasquirt piggy?
Continuing from my previous thread, I'm going to go with an MS-I v3.57 board running in parallel on my '99.
I have some free time coming up, so I'm going to tackle the install in about a week.
However, I'm still a bit unclear on the wiring. I've read Braineack's guide, but I'm still struggling with a couple of things.
First, how do I determine which leads on the boomslang should be wired to the megasquirt pigtail?
For example, I can see in the images on Braineack's guide that pin 37 on the DB37 connecctor is for the fuel pump, but I don't see where I get that signal from the '99-00 ECU pinouts.
Second, how do I wire the '94-97 CAS? I see pinouts listed on Braineack's guide. When I buy the CAS, do I need to get a wiring harness for that as well, and pass it all the way through the firewall to the megasquirt piggy?
Easiest route is to get the harness for the CAS from a 90-97 car but you can just connect small female spade connectors to the CAS pins. Then you run 1 wire to ground, 1 to 12v, and the remaining 2 to the corresponding wires on the DB37.
#5
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Not much more to it than what you just mentioned. You just don't take the spark and fuel control away from the stock ECU (by not cutting the wires on the boomslang and redirecting them to MS). Make sure all the gauges read correctly and calibrate the TPS and such. After that, cut the wires over for injectors, then test it, then wires for spark.
#6
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Grab the 99 wiring pdf from Miata Information and use that to get what pin number you need. Then use this diagram to find its position on the connector (most of the stuff you need is already marked anyways)
![](http://i28.tinypic.com/ivyhdu.jpg)
And dont bother with the cas...you can mod your stock crank wheel and use that.
![](http://i28.tinypic.com/ivyhdu.jpg)
And dont bother with the cas...you can mod your stock crank wheel and use that.
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Zaphod
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10-26-2018 11:00 PM