- Tue Sep 05, 2023 1:51 pm
#64753
It just came back in stock I noticed yea. I bought some thanks! But the part is discontinued, would be nice to know a replacement for the future.
NickZ wrote: ↑Sat Oct 28, 2023 11:04 pm Are you using a mega2560 MCU? with a 60-2 and either ignition or injection set to 6 cylinder the processor may be getting maxed out at high rpm and not having time to dwell the ignition channels.There is a lot of setups running that just fine and it's not really a problem. There is even 600-700hp setups running without misfires.
Dzeerve wrote: ↑Wed Oct 25, 2023 7:55 pm Hello again! even tho i have succesfully used your and other speeduino boards on other projects my own car with rev 2.1 board still gives me a headache. i am fighting with a wot misfire for a looong time, and finally i am getting some clue. today i upgraded to newer firmware and now it allows me to log measured dwell time and no surprise- dwell time drops at the same time when misfire happens. as you can see in this screenshot from my logAre you running the 202305 FW? The older ones have some random ign problems on these boards that might cause misfires at higher RPM.
dwell time drops as low as 1.2ms even tho i am requesting 2ms in my tune. what could be the reason for measured dwell time be way lower than requested?
pazi88 wrote: ↑Mon Oct 30, 2023 7:19 amMega2560 are not all the same, i've had good performing boards and bad performing boards, I have definitely had mega2560 boards that couldn't do the 60-2 trigger at high rpmNickZ wrote: ↑Sat Oct 28, 2023 11:04 pm Are you using a mega2560 MCU? with a 60-2 and either ignition or injection set to 6 cylinder the processor may be getting maxed out at high rpm and not having time to dwell the ignition channels.There is a lot of setups running that just fine and it's not really a problem. There is even 600-700hp setups running without misfires.
NickZ wrote: ↑Thu Nov 02, 2023 12:20 am Mega2560 are not all the same, i've had good performing boards and bad performing boards, I have definitely had mega2560 boards that couldn't do the 60-2 trigger at high rpmYou sure? The race condition problem in older FW was totally random and it was sometimes almost unnoticeable and in some cases it caused severe running problems.
pazi88 wrote: ↑Thu Nov 02, 2023 10:21 amI referring to the quality of the mega chip on some of the cheap boards, I have had some that have underperformed, not the firmware.NickZ wrote: ↑Thu Nov 02, 2023 12:20 am Mega2560 are not all the same, i've had good performing boards and bad performing boards, I have definitely had mega2560 boards that couldn't do the 60-2 trigger at high rpmYou sure? The race condition problem in older FW was totally random and it was sometimes almost unnoticeable and in some cases it caused severe running problems.
Dzeerve wrote: ↑Wed Oct 25, 2023 7:55 pm dwell time drops as low as 1.2ms even tho i am requesting 2ms in my tune. what could be the reason for measured dwell time be way lower than requested?Looks like the very same issue I have my Speeduino install in my Miata.
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