.9 bar is 13.05 psi. @33F gives you 2.95 volumes
1.1 bar is 15.95 psi. @33F gives you 3.25 volumes
Both are way too high for pretty much everything except for most Belgians and German Hefeweizens.
For a Mexican Lager (ie, Vienna), I'd go down to about .65 bars which is 9.4 psi, which at 33F will give you 2.57 volumes of CO2.
HTH-