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Originally posted by Shadohh
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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.


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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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