Inliners International Forums General Discussion Engines Low CFM 4 barrel carb options?

This is a delayed follow up to my earlier posts above.

Here is what I have learned about tuning the stumble out of a Holley 4 barrel. The fix depends on when the stumble takes place relative to initial takeoff.
Immediate Stumbles are fixed by increasing the squirter size with placing cam screw in hole 1.
Delayed Stumbles ( 1 or so seconds after takeoff) are fixed by decreasing the squirter size and moving the cam screw to position 2.

I had a delayed stumble in my Holley 8007, 390 cfm carb. on a mild GMC 302. It was caused by emptying the accelerator pump chamber too fast. Going to a smaller squirter extends the stream of raw gas longer. Switching to Cam screw hole 2 delays the cam action slightly, which also extends the stream. The extended stream eliminated the delayed stumble problem.