FurryOnTheInside
In Memoriam
What? No! I would lower the intake a tiny bit at a time, while I was there widening it into the conventional rounded trapezoid. It could be a good idea to notch the skirt (only on the intake side!) by a millimetre or half so that when I find the point of "oops I lowered the intake port too much" I could swap back to the stock unmodified piston and that would bring back the intake duration to the previous and hopefully the optimal duration.so you would cut the piston not only on the intake but also the exhaust side?
But the notch should be the same width as the widest point on the intake port, not the shape of the top of the intake port because that's irrelevant.
Also you quoted me but that post didn't mention the piston or the intake at all.