Found the console, thanks 
I tested the realistic rendering demo on a Computer with a Geforce Titan and the Oculus DK1. Standalone game in 1280x800.
Oculus is set to 75 HZ.
Stat fps shows something about 75 fps. The stuttering isn´t so bad like it is with the DK2 on my computer with “only” the 770 GTX.
Nevertheless it is still there. There is tearing, but “HMD Vsync ON” command has no effect. Vsync is activated in the nivida 3d settings.
How do I active vsync in unreal 4?
If the frame rate is the problem, do I have to wait for next gen GPUs to be able to use the Rift with Unreal 4? After all
i can´t get it to run without any stuttering with a Titan and a 1280 resolution.
I´d love to build my stuff in Unreal 4, but it is hard to enjoy with that performance.
Did anyone manage to get f.e. the realstic rendering demo running with almost no judder when turning the head with the oculus?