One big issue with switching between metal props and composite (wood or carbon fiber) props is torsional resonance. The acro folks found that replacing a aluminum constant speed propeller with a new carbon fiber blades propeller cause the internal gears in the engine to self destruct due to the reduction in propeller mass that was damping some of the vibrations created each time a cylinder lit off. The solution was to use a crankshaft that had 6th order counter weights installed (Examples: IO-360-A1D or IO-390).

Lower horsepower engines don't have this problem but as the compression ration and/or horsepower goes up, this becomes a much larger issue. I think that I understand that one large technical advance that made the RR Merlin a success was figuring out how to build a gear box that could transmit that much horsepower to the light weight prop that they hung out front.

So prop swaps should not be done casually or you might find yourself demonstrating your off field landing skills.

Best of luck,

Wes
N78PS