Polishing Ports
I used to work on racing motorcycles and snowmobiles, this was often discussed. Some said the roughtness made the fuel and air mix better. Some said the smooth ports increased the flow. I did it on an engine and never noticed a thing, one way or the other. Remember, Lycon and others are first and formost, sales organizations. They compete with $300.00 over invoice for a factory engine. These overhaul shops are doing everything they can to survive. Look at all the gimmicks; "Black Edition", "Red Gold", "porting", "special balencing", "one man one engine", "special through hardening process". I checked with three overhaul shops about overhauling my O-320 B2B. They all said "around $15K". I got a quote from Air Power for a Lycoming "Factory Reman", remanufactured to new engine specs. Cost $14,500.00. I am convinced that I'd be crazy to overhaul, when the price is the about the same for a genuine factory reman. In my book, "SFRM" carries twice the weight over "STOH" when I am looking at a plane to buy. Crash