I datalog while driving for a little bit then review the lambda overlay table, make fuel adjustments as needed, and then upload the revised tune.
I have found no way to clear the datalog info (whether it was recorded or not) or reset the lambda overlay table to remove the previous values. Currently I have to close & then reopen KTuner & my tune to get an empty lambda table, which adds a lot of time if I do this several times. Is there a better way to do this? Or could it be added to the software? Or do I just have to drive for longer to ensure all old cells have been rewritten?
How to clear Lambda Overlay?
Re: How to clear Lambda Overlay?
Edit>Clear as described in the help that covers the application menu bar, under edit.
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Re: How to clear Lambda Overlay?
One more Lambda overlay question.
When I record a datalog with a power pull, the recorded Lambda overlay values are different than the AFR readings within the datalog recording. I can do a full ramp run & the lambda overlay shows 13.0 to 14.0 AFR in boost (telling me I should add lots of fuel), but when I play back the datalog I see my AFR never even went above 11.0 during the ramp run and that I actually need to pull fuel.
Is there a reason these are different?
When I record a datalog with a power pull, the recorded Lambda overlay values are different than the AFR readings within the datalog recording. I can do a full ramp run & the lambda overlay shows 13.0 to 14.0 AFR in boost (telling me I should add lots of fuel), but when I play back the datalog I see my AFR never even went above 11.0 during the ramp run and that I actually need to pull fuel.
Is there a reason these are different?
Re: How to clear Lambda Overlay?
After clearing watch the playback trace if you'd like to see how samples are being applied.
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- Posts: 76
- Joined: Sun Aug 18, 2013 8:16 pm
Re: How to clear Lambda Overlay?
The playback trace is what I am talking about not matching the lambda overlay.
Lambda overlay values are reasonably close to the wideband trace values around partial throttle driving (+/- 1.0 AFR), but as I transition into boost the difference between the values gets greater.
My last run for example the Lambda overlay shows AFRs of 12.5 to 12.0 across boost table which is where I want to be, but watching the datalog trace its showing AFRs of 10.0 to 9.5 in the same cells for the same single power pull.
And if I change the fueling so the datalog trace is closer to the 12.5 mark, the lambda overlay starts showing me 13.8-14.5 AFRs for the same power pull, which is concerning.
Is there a reason for this difference? & which value should I be using for tuning?
The datalog traces seem to more closely reflect what I am seeing on the wideband gauge while driving (wideband gauge & wideband reading in KTuner match), but the lean AFRs showing in the lambda overlay have me concerned.
Lambda overlay values are reasonably close to the wideband trace values around partial throttle driving (+/- 1.0 AFR), but as I transition into boost the difference between the values gets greater.
My last run for example the Lambda overlay shows AFRs of 12.5 to 12.0 across boost table which is where I want to be, but watching the datalog trace its showing AFRs of 10.0 to 9.5 in the same cells for the same single power pull.
And if I change the fueling so the datalog trace is closer to the 12.5 mark, the lambda overlay starts showing me 13.8-14.5 AFRs for the same power pull, which is concerning.
Is there a reason for this difference? & which value should I be using for tuning?
The datalog traces seem to more closely reflect what I am seeing on the wideband gauge while driving (wideband gauge & wideband reading in KTuner match), but the lean AFRs showing in the lambda overlay have me concerned.
Re: How to clear Lambda Overlay?
Samples are averaged. Clear and watch playback as noted.