Those big, high pitch props 17x13 16x12 etc are more about getting the engine RPM down than they are for speed.
There are very strict noise regulations in pattern thus most folks are say propping to get the engine to rev about, say 8000 RPM and less.
Because of ground clearance, larger diameter props can cuase problems, thus the only option is to increase pitch to decrease revs.
The engines used, those specifically for pattern are designed to deliver power at these low RPM's.

To get high speed you need high pitch, high RMP... Pylon racing style. 10x10 at 30,000RMP sort of thing. That'll get you there veryfast. but again you'll need specialist engines.

What type of plane, engine combo and effect are you after?