Megasquirt MS3 & MS3X
Turbo Mini Forums

Schrödinger's cat - so which one am I ???

Jean i do agree it has a lot of excellent features however $1200 is a lot of money also and for europe with import duty and VAT puts it in the same money as the high end well known brands.

I still think an optional case with ampseal for a diy build would be a good thing and would entice people into MS over other makes.

I'm happy with the standard connectors.

I wouldn't buy one either, just keeping the thread up to date. I already have three of the original MS3/3Xs :)

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

paul im new to ms3x i have not yet bought it but im keen so have gotten tuner studio and log viewer in the hope of some what getting my head around the settings and functions but i cant find any maps that would got me in the ball park starting points for the 1098 im doing so what im realy asking is there any places i can get the maps from so i can have a look see?

The attached zip file includes a .msq from our 1293 turbo.

You should be able to load that into TunerStudio to have a look.

If you use it, then you will need to take 360 degrees out of the injection timing table. I'd added it in to cover a cockup on our cam phase sensor.

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Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

cheers mate ill have a look around = ) also i see that to unlock the full use of tuner studio id need to buy it is that necessary for what we are doing? not that id buy it till i have ms3x anyways..

edit: scratch that ill need the cylinder trim functions to cater for wall wetting ect

Edited by Turbo This.. on 14th Jan, 2013.

All, I have tried searching on here about MS-2 Siamese vs MS3X, with not much luck. If a person is starting from scratch, what are the pluses and minuses of the 2 options: MS-2 Siamese and MS3X? Also is the MS3X ever getting siamese code?

Best Regards,
John R.

A bit like your plenum question, I don't think there is any comparative data to say which is "best".
By comparative I mean a back to back test on the same engine (just an engine with siamesed inlets) with both of the ECUs setup to their optimum for that engine.

Other than that you will just get Paul and the others using MS3/MS3-X listing all its pros and myself and the others using MS2 (siamese) listing what we consider its pros.....

As for the last question, it was on the MS3 "roadmap" ages ago but best you register on the MS-Extra forums and ask direct, I've no doubt James (JSMcortina) will answer. Personally I doubt it, but stranger things have happened.

HOWEVER, if you are asking in the context of the 8 cylinder Packard engine in your other thread, if I've understood it's design/firing order correctly, I'm almost certain that would immediately rule out an MS2 in siamese mode as I think the code only allows for two siamese ports to be sequentially injected 360* apart on a 720* engine cycle whereas you would need four injection sequences 180* apart on the 720* cycle. Although a suitably built MS2 can drive four sequential injector channels, in the siamese part of the code, I'm almost certain the 3rd and 4th channels are only available as staged injection added to the 1st and 2nd, not as a 3rd and 4th sequential pair. (Hopefully Jean will see this and confirm or otherwise).


EDIT - bit added.

Edited by Rod S on 10th Mar, 2018.

Schrödinger's cat - so which one am I ???

Actually I may be wrong about the 8 cylinder siamese MS2 possibility......
I've managed to setup a temporary project in TunerStudio for 8 cylinders siamese and it hasn't thrown up any errors but I'm out of the country at the moment so I can't try to load it to a real MS2 and see if it's accepted.

Schrödinger's cat - so which one am I ???

Rod S, thanks for the reply. I didn't assume anyone had done back to back tests, but assumed the 2 adherents would list what they think are the pros.

I was asking in general, because I thought that might be useful to other users contemplating EFI but unsure what route to take.

With respect to an 8 cylinder engine, thanks for looking. I had read on Jean's website that with more than 4 cylinders only semi-sequential injection is available, but didn't want to divert the thread from the A-series.

Best Regards,
John R.

Schrödinger's cat - so which one am I ???

Rod, your assumption was correct. The siamese code is limited to a 4 cylinder engine and the 2 additional channels are for staged injection. There may not be an error code thrown if you try an 8 cylinder setup but that still won't work correctly.

Thinking about it, it would be possible to use the MS2 with 4 channels and set it as a 4 cylinder fully sequential injection. That would allow using it as a single pulse setup the same way MS3 is being used. The advantage of using the MS3 is that you don't have to cheat and you can configure it as an 8 cylinder but you do waste half of the injector outputs (but you get the other MS3 features).

Jean

http://www.jbperf.com/

Thanks for the replies. Glad that I didn't have bad searching skills as to the MS2 vs. MS3X issue. I moved the non-Mini content to the non-Mini section so as not to hijack this thread.

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=612576

Best Regards,
John R.

Hi all, I’m in the final stages of wiring up my Ms3 / msx and just have a question about the cam sensor:
I’m using the cherry gear tooth sensor (as per diyautotune sell - open collector type - in back of timing cover) and plan to run it at 12volts. Am I then ok to use the inbuilt pull up resistor in the msx (2.2k) as I am guessing this pulls up off the 5v rail? Or should I power the hall sensor from the 5v supply or alternatively use an external pull up resistor? I am just worried about damaging something if I have both 12 and 5v connected together somewhere!
Also I have grounded the hall sensor to the sensor ground rather than the crank sensor ground - will this be ok?
Many thanks.

I’ve now run the cam sensor off the 5v supply, just need some oil now and I can see if it all syncs.
Thanks

Edited by minivan63 on 30th Jul, 2018.