>
> Paul,
>
> Could you detail exactly what you want MS to do?
If
> that's clear, then a hardware/software config can
be
> specified to meet those needs:
>
> Fuel Side:
> # and type of injectors (low/high impedance)
> Primary/secondary staging, or batch fire all four?
>
> Ignition Side:
> Stock 2nd gen ignition? If not, what coil/ignitor
> type is to be used?
> Leading/trailing timing split needed?
>
> Sensors:
> - Stock Mazda manifold air temp and coolant temp
> thermistors? If not, what type?
> - Stock CAS(Crank Angle Sensor), or custom
> wheel/sensor? If custom, spec sensor type.
> - TPS is optional, certainly not needed for
testing
> purposes. In MS world, it is used for accel
> enrichment, and for triggering flood-clear mode.
> Flood clear can be handled in other manners.
Accel
> enrichment can also be provided using map signal
> (rate-of-change of map, rather than rate-of-change
> of
> tps), which eliminates the need for TPS.
>
> There are daughterboards being used by some rotary
> guys to give a true 'plug-n-play' setup for use in
> 2nd
> gen cars. Given your application, this can be
> avoided
> completely.
>
> If your spec is open, here's what I'd suggest:
>
> Run stock high impedance injectors, or low
impedance
> with the stock resistor pack. This eliminates the
> need for the extra flyback circuitry you may read
> about.
>
> Use a stock 2nd gen CAS, remove the upper 2-tooth
> wheel and its VR sensor, and grind opposing teeth
> off
> the lower 24-tooth wheel.
>
> Buy an MS1 V3.0 based. MS1 indicates the HC908
> processor, while V3.0 indicates board revision.
The
> V3.0 board has a number of improvements, one of
> which
> is the integral VR (variable reluctance) sensor
> conditioning circuit. This circuit will condition
> the
> noisy AC signal coming VR sensor in the CAS,
> providing
> a clean 0-5V signal from the modified CAS wheel.
> Here's links to a couple reputable kit vendors.
> Hopefully Yahoo doesn't mangle the links:
>
http://www.glensgarage.com/catalog/product_info.php?cPath=1&products_id=30
>
http://www.diyautotune.com/catalog/megasquirti-programmable-system-pcb30-unassembled-p-46.html
>
> Use stock 2nd gen leading and trailing coilpacks
for
> ignition.
>
> Once ready to run, drop me a line, or follow the
> links
> from msefi.com for the latest stable release of
> msnsextra code. This includes support for all the
> features discussed above.
>
> This will allow full ignition and fuel control,
with
> the minimum of fuss. Given your background,
> soldering
> up a DB37 harness and wiring a relay or two will
be
> trivial, but the relay board might make the job a
> bit
> easier.
>
> Hope that helps a bit.
> Roger.
>
>
> All I need is something simple to work on the
dyno.
> Turbo charged 2nd gen engine. Ignition is not
> mandatory as
> I can lash something up that will fire both plugs
20
> dgrees
> BTDC. I can go with the CAS or build an RX8 style
> trigger wheel and pickup. I am using stock 2nd gen
> injectors.
>
> I ordered the bare boards from DIY.
>
> Is msnsextra code C or 68HC908 asm source?
>
> BTW I am thinking two of these could be used in an
> airplane
> with a 37 pin plug on the instrument panel. Unplug
> one and
> plug in the other as a preflight backup check.
They
> are cheap.
>
> Paul Lamar ...No rotor no motor.
msnsextra is asm. Latest version, and source, is
available in the zip file found here:
http://megasquirt.sourceforge.net/extra/files/
Stock 2nd gen injectors can be either high or low
impedance depending on year, so you may want to
check
to see what you've got.
Roger.
Thanks for your help Roger.
No problem with the injectors. I can figure it
out. Thats what ohmmeters are for. I spent 20 years
manufacturing electronic test equipment. I have some
injectors I probably need a few more.
BTW where is the s record file for the extra
version?
Also where do I get the assembler. Is Motorola
giving it out for free?
Paul Lamar
The s-rec and compiler are all included in the zip
file at the previous link. The compiler is
command-line driven, and there is a batch file
'compile.bat' that includes the proper command line
switches.
Roger.
Thanks Roger. Exactly what I am used to.
msns-extra.ini <<<<< What does this file do?
msns-extra.s19 <<<<< so this is the S-record?
The Brits don't call it the s-record or binary.
Rather confusing at times. :)
CASM08Z.EXE <<<<<<<<<<<< is this the assembler?
I am on my Linux computer so I cannot execute it yet until
I copy it over to my Windows computer.
CHOICE.COM <<<<<<<<<<<<<<< what does this one do?
A terminal program perhaps?
908_GP32.08P <<<<<<<<<<<<<< This also appears to be an s-record.
Ahh tricky them Brits. Avoiding naming conventions :)
I am not complaining. One does not look a gift horse
in the mouth.
Paul Lamar ...No rotor no motor.
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