rusefi sequential 6 cylinder ignition multispark vs single spark

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gurov
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rusefi sequential 6 cylinder ignition multispark vs single spark

Post by gurov »

nobody asked for this, but here's a comparison of spark sounds, running somewhere around 1000 rpm maybe, settings of max 3 spark, 2ms additional dwell. main dwell at probably around 4ms. these are GM coils with built-in igniters.

multispark: https://www.youtube.com/shorts/l0-3FadAFIo




single spark: https://www.youtube.com/shorts/euJszofUT78


multispark sounds cooler.
1994 6speed supra turbo [ single turbo/1000cc ID/twin fuel pumps/bc2 262 cams ]. J&S safeguard for knock , UAEFI / 407 disco with rusefi / AEM EMS v2 / MS3pro PNP / Speeduino (mega2560 / teensy41 / stm32f411)
2020 BMW X3m - bootmod3 stage1
gurov
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Re: rusefi sequential 6 cylinder ignition multispark vs single spark

Post by gurov »

couple more that nobody asked for, but as i'm testing things for melting, i took a video:

250-ish rpm, cranking mode, 6 cylinder sequential ignition, and injection, but injection is simultaneous while cranking:

https://www.youtube.com/shorts/v0IeTYYb0yA


and 700-ish rpm running mode, sequential ignition and sequential injection, no longer simultaneous:

https://www.youtube.com/shorts/hcnJLM9AdGU
1994 6speed supra turbo [ single turbo/1000cc ID/twin fuel pumps/bc2 262 cams ]. J&S safeguard for knock , UAEFI / 407 disco with rusefi / AEM EMS v2 / MS3pro PNP / Speeduino (mega2560 / teensy41 / stm32f411)
2020 BMW X3m - bootmod3 stage1
gurov
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Re: rusefi sequential 6 cylinder ignition multispark vs single spark

Post by gurov »

this is what multispark looks like on logic analyzer:

1 5 3 6 2 4 firing order


D1 = 36-2 wheel
D2 - D7 = cyl1-6 ign

maximum 3 extra spark
this is about 1000 rpm, main dwell is 4.2ms

(right click -> open image in new tab, to actually see wtf)
image.png
image.png (20.44 KiB) Viewed 3769 times
1994 6speed supra turbo [ single turbo/1000cc ID/twin fuel pumps/bc2 262 cams ]. J&S safeguard for knock , UAEFI / 407 disco with rusefi / AEM EMS v2 / MS3pro PNP / Speeduino (mega2560 / teensy41 / stm32f411)
2020 BMW X3m - bootmod3 stage1
mck1117
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Re: rusefi sequential 6 cylinder ignition multispark vs single spark

Post by mck1117 »

See also my original video of coil primary current when I implemented it:
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