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Fuel and Ignition Table

EFI Tuning Fundamentals

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Discussion and questions related to the course EFI Tuning Fundamentals

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I have spent countless hours doing my fuel table on the road. Car is tracking Lamda very close to what i wanted to be however the 3d view is quite worrying. Left side is mine after tune and right side is base map. I understand the graph is meant to be smooth . am I doing something wrong or can it be during peak torque you have more fueling ( around 3.5kish ) and after fueling can be reduced?

Any advice is much appreciated

My table tunned on left has too many peaks and not smooth pattern

[img="blob:https://www.hpacademy.com/cb71526b-5969-4c5c-95b9-36a66ad22189" alt="" alt="" ]

[img="blob:https://www.hpacademy.com/c9717e24-2053-4122-b76d-483936deb927" alt="" alt="" ]

same thing with my ignition 3d table, car is NA and doesn't knock / confirmed with base knock levels I had. You will see a spike around 3k which is 53 degree

Should I use smoothing feature?

[img="blob:https://www.hpacademy.com/018fa463-8c36-46ae-9b6e-d38ef5d565e8" alt="" alt="" ]

[img="blob:https://www.hpacademy.com/ef7e67c6-e1d1-4e64-a004-3c1d9010da03" alt="" alt="" ]

Once I turbo charge it, I can use dyno to check ignition table as paying £500 for a day of Dyno little unresoable on NA engine

I cant see the photo however depending on what tool you are using I like the interpolate x and y functions with smothens inbetween 2 different points (the first and last selected cell in a range)

The fuel map with typically follow the shape of the torque curve. So it is very likely to need less fuel after peak torque.

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