Well that's what the stepper motor does here, opens up the throttle and the ECU gives a bit of extra fuel. But this is not what I'm writing about, please read carefully, I already explained twice what this valve does (it does not have anything to do with the throttle, it interferes with the way ignition works), the question is why would you want to reduce idle advance and what good could it do to emissions?

LPGO, your a nutter (nothing new there)! I like it
I see in your other thread you mentioned developing multi spark, that lead me to here: http://dtec.net.au/Multi%20Spark%20Ignition.htm
I can see the advantage at idle but it becomes redundant above 1500rpm. I can see you are making the best ignition system you are capable of, good on you.
Is the 2cv coil capable of these fast recharges? Does wasted spark effect them also?
Keep it up.

Harley

Googled nutter can't find a decent explenation, hope it is good.......

As told in the other thread I had an discusion over it at the dutch 2cv forum, some guy wanted multispark, I told him I aleady tried it but don't see the advantiges of it, I told him also with a black coil the next spark comes way to late to influence??? the burning.
With a Visa coil you can but 1-2-spark doesn't like the Visa coil yet. I need to programm a
prediction (when will the next spark occur) which I haven't yet. It runs on a Visa coil but it doesn't feel right (for me) you wouldn't notice it at all I guess.
123 has got the same problem with it.........
What they do with multispark is they don't finish the spark but they already start loading the coil for a new spark..... and this several times..... My opinion is that you can make better 1
good spark then 3 half sparkes.......

Because it doesn't work above 1500 rpm whats the advantige then, none, I don't drive
less the 1500 rpm with my 2cv do you??????

1-2-Spark starts the engine very well at the moment (cold or hot) I don't know how I can improve that. Mostly the first spark produced fires the engine at once..........
Because I/you can adjust the dwell time, you can make the spark as hot as you want.

At my car and testdrivers cars the dwelltime at cranking is 0.0015 seconds 15/1000. at above 4000 rpm it is only 0.003 sec. 3/1000sec. do to the drop of tension 8 volts at cranking... (the starter engine is draining the battery) You can pump up the dwelltime to
0.0025 second but it doesn't need it. the coil is oversaturated then....


How does 1-2-spark work.
1. sensor passing (45 degrees before tdc)sets the timer to zero
2. sensor passing (45 degrees before tdc)reads the timer and calculates when the spark needs to occure
Now the spark occurs (lets say 8 degrees before tdc.)

1-2-Spark...

So within 2 rotations of the crankshaft the first spark occurs..........

When I do multispark I do it my way. Finish the first spark completly with 15/1000 sec of dwell give the coil a rest of 1 or 2/1000 of a second and produce then a second spark with 4/1000 sec of dwell with a black coil/Harley coil the second spark occurs then at about 3,5 degrees btd at cranking speed then . So I will only do this till about 400 rpm to make starting the engine even better..... I hope that because a spark has just occured I don't need the full dwell time for the second spark. This is what I want to investigate...

Will test this this week.....

However I did already test multispark (with a black coil) maybee you have seen my vid with a contiues spark!!!!!
https://www.youtube.com/watch?v=NSpnbQ5I4Qc

With a Visa coil you can fire it 3 times when cranking the engine!!!!!

I think he says you look like this with all your workload

New advance-tab (sofar)

Hi Geo,
Send me a pm with price etc when it is ready for me. I wil transfer money as before
Chris

Now Chris you need to believe me but steam is really coming out of my ears, it lookes ready but it isn't by far.. I'm working all my sparetime (which I don't mind, but its 1 step ahead and 3 steps back)....... You want a table, another one wants multyspark a 3. wants his
Citroen GS(A) engine 1-2-Sparked, and I'm programming my arse of...... You really haven't a clou how much work it is to make 1 and 1 = 2, programming the microcontroller and software. I needed the whole last week only to make a decent reading from the advance table in the controller which are 144 numbers to your screen, so you got to be patient..... A week ago I told you this would take me another 2 months (implementing a table).......... and yes I know you want one and yes you are getting one as soon as I'm satisfied......

Enough of this heres a little update again......

New PCB's are in



New cassings are also in, (the same like yours Chris)



At the moment I've build the first unit, working at the new software including the 12 by 12 advance table.



Now heres my plan, the new unit is going into my wifes son's Peugeot 205, then I can test the new software with it at once. This will be this weeks task. Then I can test the newest software...

Advance-table and 4 cilinder engine........
I think I need another month to make the software and the controller stable........
Then I need to figur out how I can produce the units as fast as possible. This one took me about 8 hours to finish................

When the Peugeot runs I will make a nice video of it........

At the moment I'm programming that the cel shines yellow, from where the engine is taking it's numbers, so you now which cell to tune.........

I hope you understand what I'm writing.......

Hi Geo,
In no hurry as original 1-2 spark working very well. If it takes another 2 months or even 6 months no problem.

1-2-Spark to the next level........

Today I managed to let my wifes son's Peugeot 205 run on 1-2-Spark...

Have tried the whole week to make it happen, it iddled perfect and above 3000 rpm it ran smooth but from 1200 to 2200 rpm it ran like crap... So I reprogrammed the whole timing section of the controller so that it can run 2 cil. and 4 cil. (with distibutor) and 2 coil wasted spark...... I'm reelly proud on my programmed timing section now, it is reelly well programmed now (I guess) (also for 2cv)......

So what did I do.... I bought a Bosch (universal) coil and installed it in the engine bay together with the 1-2-Spark unit and made a little plate at the crankcase beltwheel 45 degrees for tdc cil. #1.....





So today with the new software it ran like crap again, till I retarded the advance and suddenly it ran good. So I think I advanced (tuned) the ignition to much so that the gap between rotor and contactpoint in the distributor where way off to make a spark, so a spark
couldn't jump, so no ignition. So the ignition fired backwards, resetting the timing of the controller. Now I must tell I connected the maphose of the controller to the inlet manifold
but disconnected the original hose ( advancing the distributor) thats why the gap went to big...... Tomorrow I will connect the maphose also to the distributor, so that I can tune it for reel....

Will make pics and videos of the car tomorrow, (it snows like hell at the moment over here)!!
Hopefully I can make/take some pics vids tomorrow

No tuning today I guess.......




Keeps snowing for over 24 hours right now, decided to celebrate X-mass today.....