MoTeC Global Forum

Is it possible to use an fuel long term trim like the haltech elite 2500 have?

What it does is that it takes the lambda correction offset and adds adjustment in % in an separate long term trim map, to show the user how off the map is (it applies the adjustment in real time all in the background in the ecu).

Then the user can apply this permanently to the base fuel map later on if its needed.

Is this possible?

Not in the GP packages, however the closed loop fuel if properly setup will give you a pretty good result (doesn't beat tuning it correctly however).

It would be possible to do something like this in a custom firmware package with M1 Build. Not aware of any that do it currently.

While not the same, This can be achieved using lambda logging and "Lambda Was" function within Tune

This was one of the features i liked best with my elite2500 ecu.

Even when you have a almost perfectly tuned map its nice to see if something changes, the long term trim tells the story for you.

Engine wont necessary run better because the lambda correction will take that but you wont really know it unless you check the logs.

Hope they add this some time. Self learning is nice

From memory, LTFT is something that's in development I believe. However you may be better off pointing that query towards support@motec.com.au amongst plenty of other changes coming for the GP packages.

Any news about this?