Quote:
Originally Posted by BRUTAL64
Polish in not really needed. It's a waste of time on a street driven or race engine that is not torn down on a regular basis. A good smoothing of the exhaust ports is all that is really needed. You never want to polish the intake runner of a carb engine. When I do the Port Class for you guys I will explain all that.  |
I don't polish anything. I do smooth out the combustion chamber though just to get rid of and sharp edges and I unshouding the intake and exhaust valves a little. I'm not doing too much on the intakes because they are already fairly large for this engine. I also know that the rough surface helps keep the fuel atomized and prevents puddling so even if I were to enlarge them I would keep them rough. However, I'm just smoothing the entry on them and blending the short turn radius because they left a little bit of an edge on the intakes. Most of my work is on the exhaust port. I'll take some pictures tonight and post them up.