As long as the FDR checker reads at or above the minimum you are ok. In any case, I have tested many different gearings and did not go faster. Ultimately I would advise to just run thr hearings I originally posted for the 2.0 cars.
I think we are barking up the wrong tree here and I am sorry for the trouble caused. Again, I confirm that the difference is infinitesimal.
The only way to get faster is to focus on chassis setup and driving.
Let's please re-focus the conversation on that.