megasquirt help

[neverlift]

long story short,I grabbed a ms1 v2.2 no harness so I made one, so far I got my fuel only side ready to splice into a stock harness(yeah I am lazy). Saved about 100bux though on the db37 MS sells.

Its a v2.2 board so I have to make the ignition harness and circuit. I notice a power transistor is used to do so, anyone try the stock power trans? I am wanting to power a single coil off the board, I know in theory the stock unit should work being the same thing rec by MS ,but larger. Which white wire to trigger the ms? the shielded white? tomorrow I should start the ignition harness, also tapped into stock harness.

So has anyone ran an ms1 v2.2 on MSnextra on the ka? sorry for the long read its just alot getting into it, trying to take it step by step but am about out of baby steps and need advise...

[WDRacing]

I'm not sure how many guys are actively using the MS or got it all the way running if they decided to try it out. Might not get to much advice. I have zero experience with MS, mostly because I've heard pretty much nothing but bad when it pertains to the 240. I've read great things on other vehicles though, perhaps you'll be one of the NICO pioneers!

Make sure to document the build and tune. AND TAKE PICS!!!!!!

[Seishuku]

Not a KA, but my SR20DE uses nearly the same components.
I think it's the white wire, but it's not a huge deal to have to swap it to the black lead. I don't remember exactly, I use both (2nd trigger).

I also use the stock power transistor built into my distributor, 80 degree trigger angle, spark invert set to no with a 1k 5v pullup on the coil trigger output. I use a running dwell of 3.0, but the KA external coil will probably be different (I have an internal coil like the OBD2 KA).

[Chris28]

Not sure if it helps, but I found this in my bookmarks and thought of this thread.

http://www.diyautotune.com/tech_article ... _240sx.htm

[Seishuku]

I never really liked the layout of that article, but there is some good info there.
There's also this page from the MS Extra docs:
http://www.msextra.com/doc/ms1extra/Diz ... an_v22.htm

[neverlift]

well got a harness made for 10 bux. I need to iron out some details decide how I am gonna spark it, I want to use the stock power trans , may need to tear out the stock resistor and condensor, not sure what they play. BUt I also have an old msd box not sure if it work, its the easiest way to fire the setup IMHO, may even look into getting a new unit to run.

wd not many pics:( I suck at that, I get consumed by the project. I honestly hate to leave such a solid running setup for something so unknown, but thats just how I am lol(recall the dohc powered by sohc 8bit ecu, I did that). But dont worry I will release any info I feel pertains. thanks for all the links guys( already been through em a few times )

[neverlift]

well fellows we have squirt and we have spark, just not enough and not at the right time The engine gets kickback and stops itself, has not hurt anything yet ,but I only do it once and go back to the drawing board. I think I found some good usefull info lastnight at 1ish.. wrote it down lol.
One laptop fell through, another will attempt tomorrow or tuesday...

Its not really my main focus, the car runs great as is without this, making the wife angry, lol.. Has ac and plenty of power to take out bolt on, afc'd, sr's while blowing ice cold air.... Just a project I wanted to take on years ago,and has now fallen into my lap.

the msd will have to wait, I sent it to a freinds dad who is an electronics engineer to take a look, IDK what happen to it, one day it stopped working, didnt have time to find out. 8 years later I wanna use it... if not I can pick one up off cl from a honda guy for 60bux..

[skyzim]

so what is your problem with the car now? I'v got a successful s14 squirted, and have been working with megasquirt for 3+ years. Let me know if you need any help.

[neverlift]

well its on hold right now.
the problem is trying to trigger off just the 4 inner slits on the stock cas wheel, that at the ms I have doesnt allow me to choose between leading and trailing edge. Then the motor I was trying that out on blew randomly one day. Now I am just trying to put miles on the rebuild(long story but it was supposed to be a solid motor).

Good news is I have a local guy that has a homemade cnc machine, I am waiting on him to attempt to make me a trigger disc. If that happens I will continue I am no longer trying to sell the thing so thats a plus. If you have any insight on how to trigger off the nissan de cas wheel with ms1 v2.2 on msne(IIRC)

[nelson8708]

a lot of people use the trigger wheel off a dsm to fix the kick back issue. I tried to go mega squirt and ended up with a 350$ paper weight. Maybe one day i'll finish it but, will definitely use the ford edis ignition setup

[neverlift]

see I want a dizzy and single coil, some of the options are swaying me that way..

well got sadder today, my homemade harness met a nasty end when a buddy said his buddy needs a few things to go test out a motor(14 to 13 dizzy). And better yet I will have to fine someone with a laser cutter to cut a cas wheel or buy the ones available online.


Nelson I hear that but to my knowledge only a couple of those are floating around, a guy in ga has 2 but didnt want to sell me one. If I could find a list of cars with the proper cas I would be golden, however from my understanding a 4g63 is the one I need..

[nelson8708]

yeah, the 4g63 and a specific year of miata (dont remember) from what i've read. I'm kind of over it now, once i need more than what i can do with the emanage i'll go with a nistune setup.

[neverlift]

yeah ms is overkill for my setup. but you know how it is, a deal fell in my lap..

[skyzim]

well u can use the stock s13 & s14 cas with ms 3.0, not sure about 2.2. But if you really want go the megasquirt route with any engine your building i suggest u get v3.0 or v3.57. You just wont be able to get a really good running tuned turbo car with MS 2.2.

[neverlift]

thats not true. It just need a trigger wheel or a different cas and it can run fine, from my understanding v2.2 is the most "gone through" of the lot. :iuno

[nelson8708]

if you decide you want the pre-made ms1/2 harness i'll sell mine. Still in the bag for DIY, i dont plan on using it

[neverlift]

cool, pm me a price and I will keep that in mind. Its on hold atm for sure. But I might find another car to put it on lol, or a bike or something.

[s13drifter88]

if you need any MS advice, go on drqft.com and look for dakar318. its a friend of mine Richard, he has an SC61 ka-t running on MS. he'll be able to help you

[neverlift]

its kinda on hold right now, but I will look into it. Alot of people get a ka to run, but not many have with my board/ecu it doesnt have the option to run off the correct edge of the cas wheel. So unless I find a 4g63 cas or feel like coughing up a bill for a trigger disc I am stuck for now. I dont want edis for some reasons or another...

[s13drifter88]

damn, sounds like m/s is a bit of a hassle. i always prefered Nistune or EMS

[neverlift]

yes and no, what is ems?

[s13drifter88]

AEM EMS

[neverlift]

oh duh
thought it was being used loosely, the ms is an ems. Its just is a pain in the c*** with the v2.2 and a stock cas. I chose to get other more needed parts toe arms,v band,plx w/b display, rb20 12.5lbs flywheel(to lighten the white bunny clutch setup, autozone uses a 30lbs flywheel)
all of which will gain me something, and I feel that going from a good tune/setup to the ms would take me back in progress. So I am gonna just tune what I have more, and wait on the ms till I can figure out what I want most.

[Seishuku]

The stock cam wheel isn't that bad, besides the kickback starting issues.
But it is possible to modify the disc to keep the inner slots and have one outer slot for a trigger reset.


Mazworx also has a disc for using a Motec EMS, I think Mark was selling them for $20, but you'd have to email/call him on that.

[neverlift]

is that gonna work for the ms1 v2.2 with msnextra code?
From my understanding the v2.2 cannot read two signals?

[Seishuku]

is that gonna work for the ms1 v2.2 with msnextra code?
From my understanding the v2.2 cannot read two signals?

It better, that's what's running my SR right now.

MS1 extra 2.2 board needs a second input circuit added and wired to the processor, but it's a minor mod.
It can read two inputs no problem, but just not too many of them (in the case of the stock wheel 360+4).

[neverlift]

really, shoot me a link to this I can solder and build the circuit and wire it if needed. I must have missed that info.

I could probably get away with being off a couple degrees on the trigger reset ? I may not be that accurate lol

glad I posted on here you guys are full of usefull info, I was really getting ready to give up the hunt, now I am no longer going to let it go, I will keep it around till I use it.
Thanks

[Seishuku]

http://www.msextra.com/doc/ms1extra/MS_ ... l.htm#2ins
http://www.msextra.com/doc/ms1extra/Diz ... an_v22.htm
http://www.msextra.com/doc/ms1extra/Diz ... san_v3.htm

Yeah, it doesn't need to be exactly where I show it, as long as it's between the large window and the next window like I have it.
Your trigger angle should be right at 80 degrees.

Just build the 2nd input circuit like the page shows, then set it up like the main trigger input (with all the same pullups and such), or set it up like a 4g63 opto tigger (which IIRC doesn't use the 2nd trigger opto isolator).

[neverlift]

thats awesome. great info!
But I am bagging it, I already bought a daughterboard, when it ships next months I will be ready to roll, just burn my chips and go. I wont have any down time so it should work out good for me. Now I need to find some base bins/adr files... lol

[Seishuku]

It's possible to get everything going and drivable in less than a day, of course fine tuning, power, and drive-ability are another thing... That takes time. LOL
I've had my MS for a little over a year now, and I'm still tuning it. Seems I need bigger injectors (have 520cc/min now), even though I'm only running 12PSI on a T25g.

That's of course if you do things quickly and hack up a stock engine harness, if you want to make a patch harness, that will take some time to get parts too.