Speedmaster intake porting. Hopefully I can make something out of this

yellow rose said

I like the finish, but how do you get the carbide troughs out??? That’s the biggest issue I fight. No matter what I do, the walls are always wavy and there are troughs and ridges I can’t get smoothed down with a burr, so I hit them with a paper roll to get all that in shape.

My technique with the burr must suck.

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I had the same thing at first on the some of my early projects that I’ve worked on, but hit on a method that works pretty good for me to cut down on that from happening. Slowing down the cutter speed to where you can feel the cutter grabbing, along with faster tool motion (back and forth etc) and adjusting my pressure at the same time. I spend a lot less time trying to fix those ripples by not creating them, seems to happen when I get too greedy grinding