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Normal Engine Speed ROC?


MagicMike
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Hi again,

Can I have your thoughts on snippits of my log file, specifically looking at the engine speed ROC, and what is 'normal', what is not normal, and where mine fits in? 

I have zero trigger errors, ever, engine runs nice, ignition angle is very smooth.

https://www.dropbox.com/s/gyvfc7lmhhjzd3q/RPM ROC Wide.JPG?dl=0

https://www.dropbox.com/s/nw47l37iavw6npm/RPM ROC Narrow.JPG?dl=0

https://www.dropbox.com/s/m4481o53w61fhox/RPM ROC Narrow 2.JPG?dl=0

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I would say yours looks worse than I would expect but the is not enough data here to conclude that.  Please attach a log rather than a screenshot.  Ignition dwell is often a telling parameter to look at as that shows how regular the teeth spacing are arriving at the ECU. 

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Thanks for the log.  Actually your triggering looks pretty solid.  I would say your reported RPM ROC is quite real.  I would be quite happy with what I see here, and I would expect you have very good steady timing.

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Ok thanks Adam. Wish I could explain the wavy rpm signal. So if it isn't a triggering issue, it could be a tuning issue? It is still very rich up top and that is where the biggest ups and downs are. Something to keep an eye on I guess.

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