Disregard question 1. I had completely misinterpreted what I was looking at.
My undiagnosed dyslexia got me on question 2. But reverse the question. Could the uncompressed foam outside the paper filter allow a path of lesser resistance? Air up through the foam and then straight down the carb. Still filtered via the foam I guess. But could a piece of impermeable material be added on that outer ring to completely block that path?
Sure enough. I had already made one of those out of the UPE but left it off for clarity for now:
Picture. I doubt it is needed but plan on further testing when the truck gets on the road and sucks some dirt so I can see the airflow pattern. Thanks for the challenge as this is how we all improve.
