  The energy density of the universe is proportional to the Ricci scalar
curvature in the dynamical Chern-Simon (CS) modified gravity. In this paper, we
consider the Amended Friedman-Robertson-Walker (AFRW) universe and explore its
scale factor and the Ricci Dark Energy. THese turned out to be well-defined and
definite. We compare the scale factors of FRW \cite{[17]}, Generalized
Chaplygin gas (GCG) \cite{[18]} and AFRW models graphically. The combined graph
of these models show that the behavior of both FRW and AFRW models is similar
as these overlap each other for choosing particular values of the integration
constants. Also, we draw a combined graph of the Ricci dark energy densities of
FRW and AFRW models, in CS gravity, and the energy density of GCG. It shows
that the densities of former two models are increasing with time while the
energy density of GCG is decreasing.
