[Rev]

Sounds like to me that the secondary fuel inlet valve (needle and seat) had some trash in it causing an over fill of the secondary float bowl with concommitant dipping out of the boosters. I've had that happen on Holleys and just replaced the needle and seat. Anyway, that sounds like it is fixed now.

I had to drill the low speed air bleeds a little larger on my Road Demon. That changed the Idle ajustment (would only idle at about 1/8 turn out) to a more reasonable 1 1/2 - 2 turns out from closed position. That also allowed a better low speed engine part throttle when running off of the transition slots before the main jets kicked in.

You really ought to get a good Holley book to learn the "ins and outs" of tuning the Holley for best performance.

Rev