I know the seconardies are set properly. They look almost like a mirror image of the primaries at WOT and are set at what I'd call 95%- 97% open... not quite vertical. They never go vertical and start to close again.

This carb also has the Air Valve Secondary on the top of the carb, which only opens when there is enough vacuum present to open it. I really like this feature because it combines the elements of a vacuum secondary with a mechanical secondary. The AVS is spring-loaded and adjustable. I have it set a little tighter than factory so it opens later when the engine demands the added air which is also recomended for a heavier vehicle (5,000lbs). I can actually hear it open up through the carb and through the exhaust.

This is why I think I'm running out of gas in the bowl because I hear the air being pulled through the seconaries, everything is lighting-up and starting to wind-up and about 2 seconds later.... da dut da dut popita popita pop pop ( <-- me making the engine noise ) It feels like when I lift just enough to let that Air Valve close there is enough gas to feed the primaries again and the engine keeps accelerating, but at a much slower pace of course.

Anyway, just a little more thought about what I am experiencing.