larger capacity does not always equate higher fc.
think of an engine as a muscle, and fuel as nutrients/chemicals
which moves that muscle.
compare a big muscle (bigger cc) and small muscle (smaller cc), and
assume that each is as efficient in converting energy per unit
size. a bigger muscle COULD move a bigger load and consume MORE
nutrients at the same time. likewise, a smaller muscle COULD move a
smaller load and consume LESS energy in doing so. on the other
hand, it is also possible for a big muscle to move a small load and
consume less energy compared with a small muscle which has to haul
a huge load.
but now, if i had the same big muscle which is injured, and is not
able to convert energy as efficiently as it would (as in the case
of a poorly designed/ poorly conditioned engine). now, it would
consume more energy to move the same load compared to a perfectly
healthy smaller muscle (as in the case of engines equipped with
vvti, vtc, vvtl-i, vtec, i-vtec etc) .
it is therefore an inconclusive statement 2 say that bigger cc
equates higher fc.