1.2.3. 60-6 2 stroke?

Testing and development of Megasquirt 3

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MS2tester
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1.2.3. 60-6 2 stroke?

Post by MS2tester »

changed the files rover #3 into mercury 60-6 as in ms2 and got it to work :yeah!:
but something strange if i select 2 stroke ( 4 or 6 ) rpm goes haywire (loosing synch)
while with V12 fourstroke or any fourstroke it,s no problem
am i,m overlooking something here?
:RTFM:
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Re: 1.2.3. 60-6 2 stroke?

Post by MS2tester »

i have no idea wat,s going on
but i went back to 1.2.3 release version with a 60-2 tooth wheel
and as far as i can figure it "two stroke" is completly broken
i also tried 1.3 alpha 5 but the same
sparks works under V12 fourstroke but go back to 3 outputs on V6 two stroke
ignition output also doubles :cry:
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Re: 1.2.3. 60-6 2 stroke?

Post by MS2tester »

just can,t figure out why the exact same trigger teeth give a different trigger event in ms2 and ms3 :RTFM:
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Re: 1.2.3. 60-6 2 stroke?

Post by jsmcortina »

Post your MSQs. I'm not seeing a problem with the default MSQ and then changing to:
60-2
6 cyl
6 inj
2-stroke
Full Sequential
Coil On Plug

James
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Re: 1.2.3. 60-6 2 stroke?

Post by MS2tester »

60-2 two stroke does not to seem to be a problem
but somehow the 60-6 modificaton in a two stroke setting cuts rpm in half
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Re: 1.2.3. 60-6 2 stroke?

Post by jsmcortina »

You haven't defined enough trigger points. A 6 cyl 2-stroke needs 6 triggers, not 3.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

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Re: 1.2.3. 60-6 2 stroke?

Post by MS2tester »

ok that seemed to work

if (num_cyl == 4) {
no_triggers = 2;
trigger_teeth[0] = 2;
trigger_teeth[1] = 30;
trig_angs[0] = -100 + tmp_offset; // to be determined
trig_angs[1] = -100 + tmp_offset; // to be determined
} else if (num_cyl == 6) {
no_triggers = 6;
trigger_teeth[0] = 1;
trigger_teeth[1] = 11;
trigger_teeth[2] = 19;
trigger_teeth[3] = 29;
trigger_teeth[4] = 37;
trigger_teeth[5] = 47;
trig_angs[0] = -100 + tmp_offset; // to be determined
trig_angs[1] = -100 + tmp_offset; // to be determined
trig_angs[2] = -100 + tmp_offset; // to be determined
trig_angs[3] = -100 + tmp_offset; // to be determined
trig_angs[4] = -100 + tmp_offset; // to be determined
trig_angs[5] = -100 + tmp_offset; // to be determined
} else if (num_cyl == 8) {
no_triggers = 4;
trigger_teeth[0] = 7;
trigger_teeth[1] = 20;
trigger_teeth[2] = 34;
trigger_teeth[3] = 48;
trig_angs[0] = -100 + tmp_offset; // to be determined
trig_angs[1] = -100 + tmp_offset; // to be determined
trig_angs[2] = -100 + tmp_offset; // to be determined
trig_angs[3] = -100 + tmp_offset; // to be determined
} else if (num_cyl == 12) {
no_triggers = 6;
trigger_teeth[0] = 1;
trigger_teeth[1] = 11;
trigger_teeth[2] = 19;
trigger_teeth[3] = 29;
trigger_teeth[4] = 37;
trigger_teeth[5] = 47;
trig_angs[0] = -100 + tmp_offset; // to be determined
trig_angs[1] = -100 + tmp_offset; // to be determined
trig_angs[2] = -100 + tmp_offset; // to be determined
trig_angs[3] = -100 + tmp_offset; // to be determined
trig_angs[4] = -100 + tmp_offset; // to be determined
trig_angs[5] = -100 + tmp_offset; // to be determined
} else {
conf_err = 17;
}

now have 6 ign outputs in a 360 dgr cycle and correct injection output
do i have have to bother about the uneven trigger events or just accept that ?
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Re: 1.2.3. 60-6 2 stroke?

Post by jsmcortina »

The uneven trigger log suggests that your trigger teeth are off by one.

How many different cylinder variants use this trigger wheel pattern?

James
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Re: 1.2.3. 60-6 2 stroke?

Post by MS2tester »

that i know for sure
the mercury 2 stroke X standard injection and XS direkt injection V6 models
the mercruiser SCI V8 four-stroke models ( not all of them but some )
the 4 cylinder in line four-stroke supercharged outboard models

and pretty sure the 6 cylinder in line four stroke supercharged outboard models also have this tooth wheel

when i count the tooth out
i think i have them at exactly 60 dgr interval
i have tried shifting them to an other place but if a trigger tooth comes next to a missing tooth it begins to become problematic

il try some more experimenting
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Re: 1.2.3. 60-6 2 stroke?

Post by jsmcortina »

Do you have a composite log from your engine?

James
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My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
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Re: 1.2.3. 60-6 2 stroke?

Post by MS2tester »

no
i am on the hunt for a 2.5 ltr dfi 2 stroke V6 ( change over to standard injection)
and was hoping tho have this all sorted out before i started rebuilding the engine

wat i don,t understand why in ms2 you don,t see that trigger difference

and in ms3 with the exact same trigger teeth you do
is that because ms3 is more precise?
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Re: 1.2.3. 60-6 2 stroke?

Post by jsmcortina »

MS2tester wrote:no
i am on the hunt for a 2.5 ltr dfi 2 stroke V6 ( change over to standard injection)
and was hoping tho have this all sorted out before i started rebuilding the engine

wat i don,t understand why in ms2 you don,t see that trigger difference

and in ms3 with the exact same trigger teeth you do
is that because ms3 is more precise?
I agree, that should not happen. However, I'm somewhat confused by your code so I'm not sure what's going on.

If you have a composite log and a list of valid engines using the wheel pattern I can get the wheel added to the MS2 and MS3 codes and figure out any problems.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
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Re: 1.2.3. 60-6 2 stroke?

Post by MS2tester »

i assembled a code version with a 1 tooth difference for every other cylinder
you can see a very large trigger difference with only 1 tooth?

i added a composite log of the a tooth wheel i cut in the same configuration as the flywheel,s

a list of valid engines would be
4 cylinder fourstroke inline half a moon cam
6 cylinder fourstroke inline half a moon cam
8 cylinder fourstroke V configuration with a half moon cam
6 cylinder two stroke v configuration
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Re: 1.2.3. 60-6 2 stroke?

Post by MS2tester »

the verado 350 but the 6 cylinders are basically all the same
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Re: 1.2.3. 60-6 2 stroke?

Post by MS2tester »

any progress with adding the wheel ?
i can at-least test if the uneven firing events are gone!
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Re: 1.2.3. 60-6 2 stroke?

Post by MS2tester »

ok it has been quite some time but i was contacted by some people who want on install an ultimate on their mercury engine
so hopefully this could be included in the standard code and the option available to ultimate users
so i reloaded the code i had in my MS3 to see where i got stuck
the fuel injection works but only correctly with the V12 four-stroke semi sequential
when V6 two stroke full sequential is selected the injection pulses are doubled
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Re: 1.2.3. 60-6 2 stroke?

Post by TubeCarz »

New member , first post so please bear with me .
I own a 25' catamaran powered by a pair of 300 hp Mercury outboards (3.0L) .
They use a Motorola ECU , which for the most part in non adjustable .
Short of putting the fattest injector in the leanest hole , using a potentiometer along with the IAT sensor and a adjustable Fuel pressure regulator ... my hands are tied .
I saw a Mega Squirt running underwater at the PRI show a little while back . I said someday I will move in that direction .
It's someday ... :)
I have a new pair of 3462 cc powerheads I have built and have a pair of 3642 cc units in the mock up stage .
The engine basics use :
60 - 6 flywheel , 6 five wire coils , 6 sequential peak+hold Keihin 2 ohm injectors , 2 cyl head temp , 1 IAT , TPS and MAP .
They also have :
Electric oil pump 250/1 idle , 40/1 WOT ( 12.2 OHM static )
Low oil buzzer , Overheat buzzer , Shift interrupt , Rev limiter .
I know this isn't as popular as a LS in a Mustang . However there are more than a few involved in my sport who are looking for a fairly east to install unit to give some adjustment to the fuel and spark tables .
Building a Gucci billet mount and following a wiring schematic to make a harness are well within my wheelhouse . Making the box work with the hard parts I have at hand ... not so much .
I guess my question is ( for now ) Has there been any progress made in making a clear path to installing this unit on a Mercury Outboard .. ???
Yes I'm reading the manual .. :RTFM: No I don't have a datalog to post ... :lol: But I would like to write a check for two units to start with .. :lol:
Thank you for your time .
Charlie ....
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Re: 1.2.3. 60-6 2 stroke?

Post by MS2tester »

Support for the oil pump is going to be interesting
The is either a fixed frequency variable duty cycle pump
Or a variable frequency pump not so good :RTFM:
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Re: 1.2.3. 60-6 2 stroke?

Post by LAV1000 »

MS2tester wrote:Support for the oil pump is going to be interesting
The is either a fixed frequency variable duty cycle pump
Or a variable frequency pump not so good :RTFM:
Set it up as a dual injectorbank and use this to drive the oilpump ??
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Re: 1.2.3. 60-6 2 stroke?

Post by MS2tester »

Charlie is going to test the signal
If it is a pulse width signal the boost valve table should do it
Other idea would be if it is variable frequency
Is to have the valve on a relay which switches between 2 outputs a high and low frequency through a programmable output
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