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Anyone using Cranking Taper Curve on MS3? Reasonable Values

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Anyone using Cranking Taper Curve on MS3? Reasonable Values

Old 12-08-2018, 12:55 PM
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Default Anyone using Cranking Taper Curve on MS3? Reasonable Values

I don't know how often folks in the Miata community use this feature and was wondering what values others use, if they use it at all.

I started with a spread of 100% evenly spaced to 75% after 120 events. Seems to work reasonably well.
Thoughts?
Thanks
​​​​​​(​Running 1.5.1)
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Old 12-08-2018, 02:15 PM
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Running 1.4.0
Played with it. It was not useful. At 200 RPM, there are 6.6 events per second. A well set-up start cycle takes 2 seconds or less. I don’t think you’re doing anything anyway.

I do use primiing pulse to wet the intake walls so the cranking pulses actually get into the cylinders.
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Old 12-08-2018, 03:01 PM
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Thanks. That is good info. I guess I should have said, it didn't seem to hurt anything. I just played with it this morning since it was colder here.
A quick follow up please. The number of events at 200 RPM, how did you determine this info? Is there a field in MLV that I can reference?
I didn't see one labeled 'events'.

I appreciate the replies. Thank you.
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Old 12-08-2018, 03:20 PM
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As I understand it, an event is a coil firing. 200 Rev / min * (1 min / 60 seconds) = 3.333 revs / sec.
4 cyl, 4 cycle engine sparks 2 times per revolution, so 6.6 events per second.
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Old 12-08-2018, 04:33 PM
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I use it to good effect with e85 and cold starts. Tapers from 1 event to 6 events and then done. Acts as a second priming pulse sort of.

starting an e85 car at 15F encourages one to explore all of the *****.
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Old 12-08-2018, 05:04 PM
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Understood, Ted.
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