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Originally posted by Shadohh
The intake port should be no smoother than 220 grit as maintaining some boundary layer turbulence is good for good bottom end. This turbulence makes the port virtually a little smaller at low flow velocities.

The turbulence also keeps the fuel thats being squirted by the injectors, airborn and does'nt land on the smooth internal surfaces and turn into droplets-like rain on a window.
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