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So the solution for this wheel is to correct offset angle for the effect of the large tooth and let it go. Offset is largely away from sync point.

Question about ignition scheduler :

Does it calculate the ignition point using the crank event just before the aimed advance angle ?

Oscillograms in the same conditions :
Curiously, there is not as much drift in the signals as in the videos.
Timing gun artifact ?

Some timing gun tests at low mid and high RPM.
0 degree advance and 0 degree offset.




The timing drifts with RPM.

Next to do is installing an adjustable pressure regulator an explore pressure effect on lag.

Why are there two lines for angle ?
Why are they sometimes n/a ?

Thanks for your honest reply. Perhaps I'm not in a hurry, because I sorted out most of the problems (these problems were entirely my fault I'm ashame). The good thing about doing idiotic things is that they force me to work. I learned to use engine sniffer and console, both great tools if you want t...

To summarize the result of these tests : First you can measure static flow by flowing 1 pulse of 5000ms. Calculate maximum pulse width for your application exemple 20ms Weight fuel flowed by a constant number of pulses (use a high pulse count to have good statistical results - I use 1000) for the co...

In the trigger decoder is it possible to skip event 1 and 2 (tooth 1)and to discribe the wheel as a 57 - 3 teeth wheel ?

This is engine sniffer on trigger self stimulator (to compare with above sniffer data) : sniffre on stimulator.png Some observations : TDC is correctly aligned with event 28 so tooth 14 Spark is correctly on 0 ° Extract from message text at sync zone for stimulator : message at sync zone.png Extract...

Can you explain the meaning of the numbers of the top line of sniffer please ?

"gap in range" so the decoding can work and reset tooth number correctly?

If that's not the problem, is it the anormal first tooth wideness? ?

About the "complaint" : for newcomers it's difficult to figure out the relationship between physical teeth form, analog VR signal obtained, digital crank signal, decoded crank signal. That's why I showed the question that way in the post. For you it's easy but not for us dumb humans. So I ...

I tried both 60-2 trigger patterns but didn't make same measurements for both so no conclusions for now. I have a complaint about the visual of the vw pattern picture : it looks like the renault pattern but is not because it's high long tooth only. Will try to give you sniffer results this evening w...

What has been shared : Flywheel patern for these engines. VR signal obtained with this unusual pattern OEM TDC position relative to sync point Behavior of MRE with some seetings available What help needed : Does the anormal first tooth make any trouble in timing accuracy? Does this wheel need a spec...

@Simon Matthew posted some information about this patern and the use of 60 - 2. He thought it could work. I restarted the tests because I'm in the way to use MRE intensively on the car and use free lock down time to prepare tuning phase. What is curious, I started the car last year with MRE had had ...

@Andrey my purpose is to share on the forum some useful information for other users. For the discussion about the results I think slack is better and only report the result on the forum. Otherwise there will be some posts with erroneous conclusions which can lead others into errors.

This is the result for coil 4 (green trace) :

TS ignition settings (FOR TEST PURPOSE) are :

TS trigger settings are :

This is the diagram of OEM ECU : It says TDC cyl 1/4 is 84° from tooth 1 at tooth 14.
TDC 2/3 is 30 teeth further (1 tooth is 6°) so it will be tooth 44.

Here is the VR sensor signal and the crank signal of MRE : My understanding is that this arrangement causes tooth N°1 to be abnormaly long (It begins earlier).

My engine uses this flywheel pattern : It's a 60 -2 but with a long male tooth.
I read Renault uses it to detect inverted wiring on the crank VR sensor.

Some results : Looks pretty linear not ?

New tool to search an explanation to strange results above IMG_20210321_180657.jpg Matthew and James helped me a lot on slack to analyse the data and made me understand that the constant wheight system amplifies small pulses measurements. To keep fuel wheight constant I use more and more pulses so t...

In this article from this link https://www.enginelabs.com/news/clearing-up-the-confusion-in-modern-fuel-injector-technology/ 2021-03-14 21_12_15-Clearing Up The Confusion In Modern Fuel Injector Technology.png I found the same data I measure. I put these data in the same format I use : 2021-03-14 20...

Here is a graph showing injector linearity (or lack of linearity). I never thought it needs a 8 ms pulse to become linear ! Injector linearity.jpg How have these data been mesured : The weight of a consant theoretical open time has been measured (here 10000ms). IE : 10000 shots of 1.8 ms (0.8 ms lag...

Some results : 14v supply 5000ms gives 11.92 grams of fuel in 1 pulse The same amount of fuel is obtained with 200 pulses of 25.800ms 500 pulses of 10.800ms So at 14v the dead time is 0.800ms. 12v supply 500 pulses of 10.800ms gives only 11.50 grams To go back to 11.90 grams you need 11.100ms So the...