Does the compilation of a projection affect the op-log?

We are maxing out the op-log at 33Gb per hour on Mongo-DB and saturating the network bandwidth between nodes.

We believe we can remove allot of updates by projecting the data in Event-Store, rather than folding the data using writes using Mongo-DB.

We believe a projection will be created as an independent entity on each node, therefore not requiring an op-log update.

Can anyone confirm this?