I'm looking at a cheap/reliable ecu solution for my BF 323. People scream megasquirt every time, but it's still over what I want to spend.

Give me reasons why a reflashed Evo8 ECU wont work with the right setup.

I already plan to convert to a Miata COP wasted spark with CAS setup to get rid of the distributor. I'm guessing I'll need to give the ECU a crank signal also, that I'll have to figure (I'm open to suggestions here). Can I fool the ECU into thinking there is a crank signal and only use the CAS signal?

 

For your BF??? First off, you're definitely a keeper. If he says otherwise, he's an idiot.

In direct answer to the second part of your question, I'm leaning towards no only because the difference in the rates the two triggers spin and the frequency of which the sensors are triggered. They are distinctly different.

Now that being said, why not a 1g DSM ECU which never used a crank angle sensor to begin with?

 

I like a man with options :P

Here's my BF, so you can marvel at his amazingness! He's definitely a keeper!



On more serious matters, I'll start looking in that ECU right now.

 

hi,i cant say definitely in your case that your cas set up will be the same but having converted many evo1/2/3s and galants etc to later ecus using mitsi cas that it supplies both a crank angle signal and a tdc signal

 

Yes, the hardest part will be to physically mount the cas/cam sensor in place of what your car uses now. Shouldn't be too hard.

 

Well, damn. That's even funnier. Misinterpretation FTW

 

Have you scoped both signals?

Edit, I answered my own question in the next post... as different type sensors will emit a different signal.

 

How did you do that?

From what I've learned, the earlier gen Evos use a Hall effect CAS and later model a induction type one. (correct me if I'm wrong) So if I understand this right, the cams are different and would need some type of adaptation to make all this work.

Or did I misread you and you meant that the CAS that is already there supplied those signals? If so, I'm pretty sure my distributor or even the miata CAS will have something similar, the limiting factor being that I'd have to choose my ECU in regards to that signal type.

Edit : Important piece of information here, all Mazdas I've seen use Mitsubishi electronics, genuine Mazda parts are built by Mitsubishi.

 

Found my own answer here :

http://www.miataturbo.net/ecus-tunin...e-74009/page2/

Post #38 : NA's use the 1g DSM CAS as well.

NA = 1G Miata that uses the same B6 engine I have.

Soooooo seems like a 1G DSM ECU swap would be pretty easy!

Aaaaand it's been done already :

http://miata.turbomirage.com/turbo_m..._upgrade2.html

Sometimes, when you know where to look....

 

yes the evo1/2/3 cas thats there supplies both signals . You can fit either evo5/6 h8 type ecu or evo7/8 sh type ecus using original cas ,in other words ive never had to change the cas to suit the ecu.

 

Amazing, that leaves me several options.

Given the choice, which ecu would you go with?

 

evo7 or 8 ecu