shotgreen

Hello all,

I'm trying to extract the oem ignition map. I'm using a MCU to look at the crank signal, ignition coil signal, and manifold pressure. Based on these signals the MCU will calculate the ignition advance and log it. Below is an image of the results so far. Obviously the map isn't right though. I think my trigger wheel settings are off and I need some to verify my drawing of the NB2 trigger wheel is correct? Once i'm finished with the ignition map i'm also going to try to extract the VVT map and possibly the dwell table as well.






Need to know if this drawing is accurate or not?

hks_kansei

Why not just remove the timing wheel and measure it, that way you can be 100% on the dimensions/angles.



Also your diagram there, I presume that the angles in the centre are measured from horizontal tooth 1-3 line?
120+70 = 190deg, not 180

hks_kansei

Also check those map readings.

I assume the car is turbocharged, since you've got map readings over 100kpa

gooflophaze

Wonder why you're not using the microcontroller as a stim?

shotgreen

I meant 110 degrees not 120, that is a typo. I'm 99% sure the angles are correct but i don't know what the relation between TDC and Tooth #2 is? The car is turbocharged and running the factory ecu with a piggyback.

If tooth #2 happens to be 10 degrees before TDC then the map would look something like this.