I looked at MS but it didn't have enough functionality to allow me to pass our inspection, I need to keep all the emissions equipment. I also think that it may run rich at idle because the injector takes a long time to close unless you use a complex driver like the stock ECU has. Unless someone has done the hard work for the Zuk you will need to modify the programming to use all the stock stuff, its not that difficult though. Track/Kick dizzy is usually Hall Effect but some early models were VR, Jerry knows the details.
__________________
Faster than the speed of dark.
Vitara 1.6, 3+3 lift, winch bumper, 33" tyres, 5:83s.
SJ413KJA pickup, 1.6 conversion.
your 90 is the worst.
it has a stand alone dizzy. makes its own spark and advance.
and that is correct the MS has a serious lack of extra output drivers.
you have to grow your own drivers , and screw them to the lid and then wire them to the spare TTL digital ports. when done , its a rats nests.
I needed 2 rats nest drivers , one for ISC, one for cold start Dash pot.
The MS has the INJECTOR PWM drive. and is fully programmable for this.
one must learn the dead times and all that first. there is a huge write up on this , online.
If you take dizzy apart and find how to get the signal out of the cmp and as Rhino said
and feed this signal into the MS2.
(needs to be scoped so you an find out if it is hall output or VR)
if VR ,then you need an amp.
if hall , it will drive the MS no problem ,(91 + is grounding driver so you invert input to MS2 in software.
the output of the MS drives the coil. no changes. On board driver.
i have charts for all the sensors. and the MS takes the data points you give and
then interpolates the full data block.
no need to put on GM sensors.
we have the data for them, in fact all , except the MAF.
The Dizzy, it is a 2 component CMP, one part is VR/Hall? and the next is the coil driver attached. NO docs. on this.
best is to scope it and ask for help for what you see.
if you see square wave. its HALL. (91+ has buffer inside hall device)
if you see gutless weak, wiggles, VR. TELL US ! love to know.
or , use MS for only FI and no spark. (needs sense line for tacho which you have)
the early MS did only that.
The Dizzy, it is a 2 component CMP, one part is VR/Hall? and the next is the coil driver attached. NO docs. on this.
First part is VR, its pretty much the same as a Samurai dizzy. You can modify the dizzy wiring to use the VR sensor for timing and the trigger unit to fire the ignition. This avoids having big ignition spikes travelling up and down the wiring. You'll need to lock up the advance mechanism.
I have a design for an injector driver that will work effectively with the stock Zuk injector. You need to use PWM but you also have to use the back emf from the injector to create a big negative voltage across it, this causes the magnetic field to collapse much faster and the injector to turn off fast. I designed my own ECU for my Vit and that was the most difficult part, I did a lot of bench testing with the injector.
__________________
Faster than the speed of dark.
Vitara 1.6, 3+3 lift, winch bumper, 33" tyres, 5:83s.
SJ413KJA pickup, 1.6 conversion.
both of those are optional on MS.
They have many options for injector drivers. a huge data base of info for 1000 of cars on file.
same with the PWM, theory , techniques for finding dead time , etc,etc.
This subject of using the Back EMF energy (snubbers is one name).
their only weak spot with them, is they made the board too small ,
it needed to be bigger , for diff, types of options.
there are complex ignitions, complex EGR, and ISC drivers. they skip all that.
(sure they have what I call scab on circuits, "rats nest" add ons. but i detest these.
and they miss out on many others opertunities, ( calif . smog ,recert?
)
how ever they have a new CAN buss product commoning with add on I/O plug-ins.
finally they get the right idea. Expansion is the only way.
That is why IBM PC took off, expansion buss and the Game Rom Pack IDEA.
A Brilliant idea. ( and the AA55AA rom redirection trick, super smart)
But today we have flash and all is a variable.
no your are correct , one has to do his home work before using MS2.
it is not PNP. (plug and play) not in the least amount.
and the VR.
this too , is covered in the MS manaual. shows how to run coax from the VR to the MS2 and select the high gain amp option. (with zero crossing detector).
MS has this and has 1000's (more) using it.
its all open source, just no Gerber files.
i for one , do not assume all "standalone " distributors made by suz, are the same world wide. Assume is a bad word for doing engineering.
and yes, you need to do some engineering.
its NOT PNP.
how ever , if you have a ford and chev, or some other popular car.
they do have all the facts you need, to wire it up.
suzuki.
ziltch. mostly ( there are some sprints./ swifts....)
both of those are optional on MS.
They have many options for injector drivers. a huge data base of info for 1000 of cars on file.
same with the PWM, theory , techniques for finding dead time , etc,etc.
This subject of using the Back EMF energy (snubbers is one name).
A snubber isn't the same thing you have to have the two transistor set up to reverse the voltage across the injector.
__________________
Faster than the speed of dark.
Vitara 1.6, 3+3 lift, winch bumper, 33" tyres, 5:83s.
SJ413KJA pickup, 1.6 conversion.
what you call snubber ,we call damper.
They have have whole thesis on this on line, one can read for 3 months
every day , and just get a flavor..... ( i have)
the drivers are all published, and on line and viewable by all.
including all the choices, and why one is better than another , for which applications.
mine has the twin driver transistors.
there are other sites that do other mod's to the baseline MS2v3 design, too.
infact , page 4 of pdf.
it uses 5 transistor for each injector.
need link?
this is a very popular ECU. open source, open hardware.
no secrets, vast users.
vast mods.
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