pazi88 wrote:Those are new bit optional fly back diodes. 1N4004 is fine.thanks for the answer. will solder these diodes.
pazi88 wrote: ↑Mon May 24, 2021 8:40 am You can try it quite easily by plugging in ardustim directly to mega2560. It works higher than 9kHz. But including default speeduino crank filters, the limit is much lower.Thanks for the responses. Ya, I'm going to try ardustim with my mega2560. I may also try 'ifdef'ing out some of the features I don't need to get the loop time down (flat-foot shifting, launch ctrl, baro, etc)
rcrpaul wrote: ↑Fri May 28, 2021 11:37 amIn actual engine you will start to see some sync losses if/when RPM gets too high. It's not like sharp "hard" limit, because the trigger signal from engine isn't perfect. Anyways with the components in BOM for these bmw boards, 8k at least is perfectly fine. I have not yet finished my new trigger "simulator" that can rev higher. With ardustim, you can trigger all the way up to 16k, but it's bit different than actual trigger signal, because ardustim has push-pull output. BMW hall sensor and/or max9926 with vr-sensors is only pulling to ground and then there is pull-up using 1k resistor. So crank signal filter cap will dominate in max RPM limit when real trigger signal is used, instead of ardustim.
Thanks for the responses. Ya, I'm going to try ardustim with my mega2560. I may also try 'ifdef'ing out some of the features I don't need to get the loop time down (flat-foot shifting, launch ctrl, baro, etc)
If the RPM goes above 7K, I assume I'll lose 'sync', but then what happens? Is there some sort of limp mode until it regains sync?
Also, if I set up a rev limit at 7K, does that actually help? I hope so, but if it loses sync, then maybe the rev limit doesn't function properly either.
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