Originally Posted by joe_f7
So it looks like it's all smoothed out and widened after the butterfly so it doesn't leak air past at idle like a bad bore job on a set of carbs like back in the day.
yep. i polished the area where the blades contact a tiny bit, but dont really remove material there, for that exact reason.
i'd like to do an actual over bore and use bigger throttle plates at some point, but this is a start.