A new one for HP?
It seemed like a non-harmful idea, and I was of course hoping for a bit of boost in efficiency and perhaps velocity as icing on the cake.
Did the Magnaport valve provide a meaningful difference over the stock valve? Now I'm curious about that. No doubt they cannot be had for cheap anymore, eh? Still, it's more fun making your own.
And to refrain the second question, big hole at 3/16"---what changes can be expected from this? If each hole size represents roughly 40 fps increase, would it be fair to expect the same for the larger hole?