On the 744, and for most FMS aircraft IIRC, if you are flying with ECON Cruise the FMC takes into account the winds. If you flying with a substantial tailwind the FMC will reduce the ECON MN to take advantage of the winds; conversly, if you are going into a headwind the FMC will then increase the ECON MN. So, there is no reason to adjust the CI. However, some airlines have a SOP if you're extremely early then you can adjust the CI.