This is a plot of the wideband data from my last run Saturday night.

Are the rest of you wideband users seeing data this jumpy or should I start troubleshooting?



Herb

 

ttt

 

Mine is jumpy sometimes. I think it may depend on how many samples you are taking a second. I'm guessing that the more samples you take the more accurate your graph will be, maybe making it appear more "jumpy" then some of the other graphs.

You should just graph out 3rd gear and and take out all the data for the other 2 gears. As you widen the graph it may smooth out a bit. It looks like your jumping between 12.0-12.2 all the way until the top of 3rd gear wher then it takes a dive which should be what everyone wants.

 

Based on my experience, that actually looks fairly stable.

 

Thanks for the info guys,

I looked at my dyno pull data (10/9/04) and put together a plot of the WB and the Dyno O2. I recall the dyno curve being fairly flat. I guess the sample rate is the key as the dyno took data once per 100 RPM, where the WB Commander looks every 0.1 seconds.
Works out to be about 3 to 1 in favor of the WB Commander.

The plot overlay is here.


Notice the offset in the initial peaks? Would that amount of time delay be due to the differing sampling locations coupled with the reduced air flow of not being at WOT?

The other cool thing about this datalogging - check out the change in slope of the RPM curve near the being of the 1/4 plot. That's wheelspin - definative and analyzable!

Datalogging Rocks!
Herb

 

Has anyone played around with the AF smooting feature on the wideband commander yet?

My is set at the default of 0 - I'm going to jack with it, but I don't want to loose the ability to see a dangerous lean spike.

Herb

 

The offset could be due to the dyno O2 being old or abused. O2 sensors respond more slowly as they age or go bad.

 

Any other info about the smoothing?