Anyone using Cranking Taper Curve on MS3? Reasonable Values
12-08-2018, 11:55 AM
#1
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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)
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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12-08-2018, 01:15 PM
#2
Retired Mech Design Engr
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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.
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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12-08-2018, 02:01 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.
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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12-08-2018, 02:20 PM
#4
Retired Mech Design Engr
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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.
4 cyl, 4 cycle engine sparks 2 times per revolution, so 6.6 events per second.
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12-08-2018, 03:33 PM
#5
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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 *****.
starting an e85 car at 15F encourages one to explore all of the *****.
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