I hope it is. My Flow Bench is still not finished (not even started after I bought all hard and software). So I can not compare before and after. But I do know it should be better as standard and I feel the minimum you should do with any head build (when you are @ this forum).
Sometimes I call this head "BLENDING". Take out all sharp edges, blent all nice into the valve seat and do the same after the seat. Repeat for valves. Try to think how air would like to pass the port and make it as easy as possible by giving it no abrupt turns. The energy needed is 20% for 80% improvement ever able to find. If you want the next 20% you need 80% of energy, so 4x more as what you have already done for only a marginal improvement compared to what you have done already. That's why real race heads are so expensive.
I also believe, the best port is the smallest port which give you max flow, or should I see max flow in relation to the size. Which means not always max possible flow, you need to keep in mind the relation between both and it also means, this is unwritten text (grey zone). Small ports give a lot of "pulse " tuning. One of the most important parts to make real power (together with head flow of course). See it as the 50DCO with lot of CFM is not the best carb for your 1000 cc Pre-Crosflow.
Since about 30 years I don't polish ports anymore, leave the ugly as grind (not many people feel it looks fast). There are 2 reasons for it. I also believe rough ports flow better and less fuel can stay condensed into the inlet track. 30 years ago we polished like mirror (2 stroke race engines) until a saw a real factory Italian FANTIC head. It was far from what we where doing and ports where at the same time also a lot smaller. The second reason why I don't polish ports it because I'm lazy from nature
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