ALL engines make their power from ALL things: cam duration, lift, ramp rate, valve size and shape, angles, cuts, and radii also, unshrouding, quench, combustion chamber shape, rod ratio, compression(expansion) ratio, rings, end gap, cylinder wall finish, coatings, intake and exhaust tuning, cubic inches, parasitic drag, inertia, polar moment of inertia, windage, cylinder wall rigidity, intake and exhaust restrictions, intake air and water jacket temps, pushrod and rocker stiffness, spring pressure, and dozens of more small things that many folks tend to minimize or ignore the importance of.
The more power make before you add the turbo, the more you will have totally.
If you can't make 50 more HP in one place, make one more in 50 places.
Sure you can just crank up the boost, but you can still get yer ass handed to you by the guy that takes more care of the little things than you do.
I am not anti boost by any means, I am just trying to raise the awareness of a total systems approach to going fast!
KNOWLEDGE IS POWER!