The shape and size of the turbo scoop will affect the gasification of fuel. i.e. small size = high flow and will improve gasification but reduce the flow speed.
If the turbo scoop has been cut beyond the sweet point, fuel will be excessive and stay in the lower chamber. That is the case of flooding at low rpm...
The size of the crank hole and scoop is directly related to crankcase volume , size and number of transfer ports, and it will affect positively or negatively the maximization of gas mass flow and speed, from the case through the ports and into the combustion chamber.
So if badly done there will be losses and no gain. If properly done, even minimal gains will be gained.
AFM
That's true. If done improperly, power will be less.