Quote:
Originally Posted by john70t
The Carcraft articles mentioned a rough surface in a carb'd intake creates tubulence and improves mixture.
Not sure what the trade-offs would be, or if that limits overall flow: aka the golf ball therory.
Port matching/beveling with a grinder would probably be a good first step, or manifolds designed for desired operational rpm range.
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I think some of it depends on where you want to make power. A rough surface is supposed to be better to low end torque whereas a polished surface is good for high RPM HP. The surface of the runners after extrude honing isn't perfectly smooth as the abrasive putty they use is pretty aggressive.