srm99, I realize you are sincere in your belief that turbulence around the carb doesn't matter, however, I don't agree. I have on two different planes had to run a static line from the carb to the fuse. You mentioned trying without a cowl to see what happens....I did that and my plane ran as well in the air as on the ground but put the cowl back on and it just sputtered in the air. I ran the static line and solved the problem...easy.

Larry