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Discussion Starter #1
I don't frequent this board as much as I should really, but I've just finished installing a MegaSquirt DIY ECU to my NA Roadster. not really sure it's JDM either :? ;)

I've done a build log on the UK MX5nutz forum incase anyone wants to see it!

http://www.mx5nutz.com/forum/index.php?showtopic=17029

enjoy!
 

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Oh i'm gonna have some questions for you.

I'm goign to be going full standalone with mine, but I'm buying mine prebuilt from RSAutosport.
 

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Discussion Starter #3
lol fire away!

Not sure if you can go completly standalone with the MS, although I'll be happy to be proved wrong.

AFAIK it can't control A/C compensation, or the strter motor and other boring stuff...
 

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Starter motor shouldn't need ECU interference, I don't have AC, etc. :)

My concern lies in the lack of a trigger wheel on the pre-OBD2 cars, I'll be running full off of cam-timing. I'm not 100 percent enthused by that.
 

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Discussion Starter #5
check out www.miataturbo.net loads of people have fitted them to early Miata.

If you're really worried you could just retrofit the later CAS?
 

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Discussion Starter #8

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yeah, plus I'm not much of a whiz when it comes to wiring. Programming shouldn't be a problem. so for $500 you can have a full stand alone and a base map. I don't give two sh*ts and a whistle if I didn't wire it myself.
 

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Discussion Starter #12

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dont worry, it's not easy to affend me in any way, i wasn't and you didnt come off harsh. 97% of what I post I'm laughing (or giggling) as I post it. I just make my avatar look mean so everyone gets scared into thinking im tough.
 

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Discussion Starter #16
Yes, checkout www.miataturbo.net it's been fitted by a very clever and helpful bloke who goes by the name of Reverant.
 

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I just got mine with a LC-1 widebind in the mail yesterday, and already did the mod to use the CAS. Hopefully I can get a day off work next week and start the install.
 

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i'm looking at reverants build up, and i'm trying to see what information i can use for my 99, as far as I've heard, i'd just have to transplant a CAS into my car and wire it in. but i could be wrong, and not to forget the IAT, and i guess i would need a wideband
 

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My concern lies in the lack of a trigger wheel on the pre-OBD2 cars, I'll be running full off of cam-timing. I'm not 100 percent enthused by that.
It's true that cam driven timing may not be as stable as the crank style, but have you seen any data which compares HP loss/gain between the two? I am interested in seeing what the difference actually is... I am running MS and decided to go with the cam trigger, and am quite happy with the result.

Of course, many people have added trigger wheels to their existing setups, so this is something that could be tackled later...

IMO you should consider just initially using the MS to control the Fuel. This would involve leaving the stock computer in place and routing 7 wires and vac line to the MS. After you have that working, then you can add the ignition. This way, if you have troubles getting the car to run, it is easier to figure out what is wrong....
 

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megasquirt is great, i have it on my turbo probe. diyautotune.com is a really good place to buy from too
 
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