How to design an exhaust pipe to increase scavenging at specific RPMs

Good day all.

I’m looking for advice on an exhaust design problem. It is easy to find videos explaining exhaust scavenging, but how do you control it? Surely there must be some physics that can be applied in order to design a header that targets a specific RPM range for exhaust scavenging to improve torque?

Can it effectively be done? If so, are there good and bad examples?

Would it negatively affect the spooling of a turbo?

Thanks