>>>
>>> I have decided to use the Megasquirt
>>> system to control the turbo compound engine on the dyno
>>> motor. Tracy's computer is too hard to tune
>>> for the dyno loads. Also the price is right
>>> on the Megasquirt. I know how to program the
>>> 6800 processors in assembly language so I can
>>> make changes in the code for aircraft use or turbo
>>> compound use.
>>>
>>> Anybody using Megasquirt on here with their
>>> rotary engine?
>>>
>>> --------------------------------------------
>>>
>>> This is a gif of the overall Megasquirt system.
>>> There is a pile of software running on notebook
>>> computers for setting up the tables and monitoring
>>> the EFI system in real time. It will even do it
>>> through Blue Tooth wireless.
>>>
>>> The relay box makes it
>>> much easier to wire as you don't have to solder
>>> a whole bunch of small wires to the back of a 36 pin
>>> DB connector.
>>>
>>> The down side is it requires a throttle position
>>> sensor which I can adapt to my custom made
>>> throttle body.
>>>
>>> Paul Lamar ...No rotor no motor.nline tool for gearbox calculation.
>>
>> Paul,
>> If you dig deap enough into the MegaSquirt web site I think you
>> will find people that have 13Bs running with it. It has been a few
>> months but that is what I remember.
>> MegaSquirt is high on my list of todos. I am in a non-spending
>> mode until my taxes come back from the accountant. I don't know what
>> my tax liability is.
>> A friend is converting a carburetor 2L VW bus to MegaSquirt. I
>> haven't seen him recently, so I don't know how it is coming.
>> I was think that I would build a rack and pinion along the top of
>> the slide throttle for a position indicator. Either cut a rack into
>> the Teflon or trim the Teflon down and add a metal rack a bit thinner
>> to the top of the slide. A multi-turn variable resistor on a pinion
>> --
>> Blake C. Lewis
>>
>> Another trick for a roll your own linear position indicator
>> is wrap a small AC cable around the 1/4 inch shaft of a
>> ten turn pot and use a screen door type spring on the
>> other end of the cable to keep tension on it.
>> Also linear pots are available off the shelf.
>>
>>
http://www.omega.com/toc_asp/subsectionSC.asp?subsection=J&book=Pressure&all=1-
>>
>>
>> Paul Lamar ...No rotor no motor.
>
>
> Hi Paul;
>
> For the throttle position sensor on your slide throttle -
> think linear sliding POT as used on old analog radio tuners.
>
> Hoping to have Megasquirt running on the test stand shortly.
> (think I said that last time too;)
>
> At this point, there is really no need to modify the core code.
> Managing your turbo may be different.
>
> One thing to note with the DB-37 cable from MS to the relay board
> is that this is not a standard straight thru DB-37 cable. Some of the
> lines (Fuel pump, injectors) will be carrying some real current
> requiring heavier guage wiring. So you end up soldering your
> wires on to the backs of the DB-37 pins anyway...although
> the wiring to the relay board is easier.
>
> Most of the relay board cases are open top.
>
> If you are planning on running fuel and spark, do your reading first
> before building any of the boards or you will end having to make
> several stages of mods.
>
> There is also a MS'NS (Megasquirt and spark) daughter board by "Error"
> to control ignition. Version 1 requires some minor mods, version2
> might be out.
>
> Relay board is nice for wiring.
>
> With 4 older low impedance injectors on the rotary, you may want the
> flyback board it is borderline. (although it takes up valuable
> space in the case for the "Error's MS'NS board"- In hindsight,
> I would probably just add ballast resistors...
>
> Stimulator board is pretty much a must.
>
> I recommend ordering one of the kits with cases and all
> from one of the vendors -
> got mine promptly from: http://www.glensgarage.com/
>
> There is a Megasquirt forum under: www.rx7club.com
> www.msefi.com
> www.megasquirt.info
> www.bgsoflex.com
> lots of sites/vendors popping up.
>
>
> If you have any questions - let me know.
> Cheers
> Cary
>
>
> Thanks for all the tips Cary. I have 1000,s of parts left
> over from an old biz so I will start with the bare
> PC boards. I am thinking of DIY. What do you think of them?
>
> The stimulator board sounds great. You can check everything out
> with out running the engine. I'll be using stock Turbo Two
> injectors.
>
> Paul Lamar ...No rotor no motor.
DIY stuff looks good - I have heard complements about their wideband O2
sensor.
I got the name of the card wrong - MegaSquit'N'Spark-Extra - Error*'s
MSnS_E Daughter Board <http://www.msefi.com/viewtopic.php?t=9621>
http://www.msefi.com/viewtopic.php?t=9621&postdays=0&postorder=asc&highlight=error+board&start=0
Provides Crank angle sensor decoding circuits for ignition.
Digikey also provides great service for the components you don't have -
last order was on my doorstep < 18h later.
Go to http://www.megasquirt.info/ and select "injectors and fuel supply"
there is a chart in terms of injectors.
If you measure the resistance, you'll know for sure. Early injectors
were low impedence...
Under heavy load, (racing/flying) I assume something will go eventually...
The V3.0 board looks to be the better board with more robust components.
Cheers
Cary
Thanks Cary. Actually Ford injectors are physicaly interchangeable
with the Nippon Denso that comes with the Mazda.
I'll have to make a fuel rail to fit this config.
I'll also need to layup a square to round composite adapator
to fit the hose coming from the intercooler.
Paul Lamar ...No rotor no motor.
Paul,
I have been interested in Megasuirt for my project but I have been busy
building the airframe. Keep this discussion going as it is very
informative. Right now it will be a NA second gen, maybe peripheral port if
I believe I can get rid of the extra heat and get a suitable prop.
Joe Berki
Limo EZ
Speaking of props. I ran into this guy at Sun n Fun.
He promised me to supply a test prop to Perry Mick.
His name is Dave Hansen and he is VP of Vari Prop
Phone number is 714 389 0953
714 321 4642
dhansending@aol.com
If you put Vari Prop in google you get a boat prop
company. I don't think it is the same outfit.
An electric motor mechanically drives a master cylinder that
forces oil into a stationary annular hydraulic slave cylinder
surrounding the prop hub that in turn changes the pitch. He quoted
a price around $2000.
BTW The slave cylinder is just like the annular hyd clutch
throw out cylinder widely used in most manual transmission cars
these days which I just happened to have invented back in 1972.
No patent in case you are looking. Widely used in race cars
until GM discovered there were no patents on the idea.
Paul Lamar ...No rotor no motor.
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