New carbs- one barrel pulling in too much air Options

[tornik550]

I purchased brand new weber 44 idf carbs from redline weber recently. I set everything equally between all barrels. I set the idle stop at 1/2 turn on both carbs. The engine started right up. I disconnected the linkage. Checked the air flow with a snail. Equal readings on cyl 1,2. Cyl 3 was pulling in so much air it was off the chart and cyl 4 was barely getting any air. I backed off the idle stop completely and I am still getting a huge amount of air in cyl 3 and almost none in cyl 4.

I took the carb off and visually inspected. Everything appears normal. Both butterflies appear closed.

FYI- I am certain that this is not a valve or cylinder problem. Everything was fine with my previous setup.


Any ideas?

[rhodyguy]

for heavens sake. how in the hell, with all 4 by-pass screws closed, do you bring the lowest ones up? backing the screws OUT routes the air flow around, BY-PASSING, the throttle plates and reducing the flow thru the venturi. YOU'VE got it backwards. you back the HIGHEST flowing carb bore(s) screws OUT to match the lowest flowing. again, not to exceed the maximum # of turns recommended. go to far and you lean that cyl(s) out.