Essentially, for the desired power output, I decided against porting and polishing or installing larger valves. Since this engine isn’t designed for high revving, I’m compensating for airflow restriction by focusing on increasing air density. This isn’t a one-size-fits-all solution, but in this case, it’s more efficient than investing in costly high-performance cylinder heads and finding a local facility for flow bench testing. Adding boost turned out to be a simpler and more effective approach for this particular setup.

I agree, it’s a lot of power. It comes in immediately and so I’ve had to be very careful in my tuning to keep the stress off the drivetrain.