- Sun Feb 14, 2021 8:04 pm
#48362
I did mention before to check spark plugs, are they the correct type?
Mere Mortal
kettlekev wrote: ↑Sun Feb 14, 2021 11:02 am ignmod2.PNGMaybe a translation issue.
Standard setup. Speeduino feeds primary via the FET driver
and here's the trigger detail.
igntrig1.PNG
Its definitely noise crashing the CPU somehow. If I just run it on the starter motor (no coils power) the mega stays up and the serial comms is solid and I can grab logs. With the coils firing all that gets intermittent and there is noise on the speeduiino 5v rail.
kettlekev wrote: ↑Mon Feb 15, 2021 6:00 pmNext step is to look at coil/spark dwell. I know speeduino does some adjustments with revs/voltage and I know where to set it up. I have running set to 3ms right now which seems pretty standard but would like to optomise it but dont know where to start with a 2 stroke setup with higher current 3 ohm coils?Start here, and it links to a post with a calc program. With a $10 LCR meter (induction,capacitance,resistance), you can calculate coil dwell, and repeat for various voltages. Note exceptions are for coils with internal diodes or certain blocking drivers, where the LCR meter cannot read. You can simply test for primary and secondary resistance with a multi-meter in both polarities. If that works, the LCR meter should work.
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