I have found from other answers that in my Eclipse Mars CDT I can setup C++11 dialect using:
Project -> Properties -> C/C++ Build -> Settings -> Tool Settings ->
You can create your own template for the C/C++ New Project Wizard. Lots more information in Creating a new C++ Project in Eclipse CDT with the same settings as another project but here is some extras about C++.
For C++ Use C++ Hello World Template as a starting point. The key difference between the C++ and C template (other than the source) is the isCProject passed to the NewManagedProject
process.
Primarily designed to make C++11 default, the Elevenator plug-in may resolve your issues. However my answer has a significant hole in that I don't know how to install it on its own as it comes with Cevelop