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Aim Air/Fuel Ratio only @ full throttle

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Old 07-14-2017, 01:38 AM
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gregturek
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Default Aim Air/Fuel Ratio only @ full throttle

Has anyone figured out a way to create a math channel that gives the A/F ratio, but only at full throttle. The idea is to create a report that calculates min/max/ave, but only while at full throttle.

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Greg
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Old 07-14-2017, 07:55 AM
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Yes. You have to do an if statement with the condition tps greater than of 90%, 0 if not, lambda if true. Then do you channel report using average if not zero for lambda. You will. Also get a good graph with this.

You also want to look at areas of increasing throttle to check enrichment. That is an area many carburetored and aftermarket injected cars don't have correct.
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Old 07-16-2017, 11:32 PM
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Originally Posted by Matt Romanowski View Post
Also get a good graph with this.
Thanks Matt! Worked like a charm. I just wish there was a min/max when not zero option for reports in addition to average.

I must be a little dense. What kind of graph were you referring to?

Thanks again,
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Old 07-17-2017, 12:08 AM
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Originally Posted by gregturek View Post
Thanks Matt! Worked like a charm. I just wish there was a min/max when not zero option for reports in addition to average.

I must be a little dense. What kind of graph were you referring to?

Thanks again,
Greg
Just the regular measures graph (strip chart). That math channel will give you a good graph where you can see how the lambda changes as the RPMs change (look at both at the same time). The chart will only tell you the average, but not were the lambda deviates.
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Old 07-17-2017, 10:39 AM
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Maybe it exists, and I am missing it, but the system really needs a null values. That way you could code if WOT, AFR=AFR, AFR=NULL. Then the non-value data wouldn't affect min-max, nor averages.
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Old 07-17-2017, 11:24 AM
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Originally Posted by mglobe View Post
Maybe it exists, and I am missing it, but the system really needs a null values. That way you could code if WOT, AFR=AFR, AFR=NULL. Then the non-value data wouldn't affect min-max, nor averages.
They are working on that. Only 2 system do that to my knowledge. The average without zero fixes averages, max is good, it's only min that is affected.
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