Eventhough I live in a super flat country, the previously installed low CR 318 in my daily would have trouble maintaining speed with some gradients in OD with a 3.23 gearing in the axle.
After a swap to a digital ignition with a better curve and 3.55 gears the problem was gone.
Now with the 11.3:1cr 360ci there are no issues at all with changes in road altitude.