Holley stumble trouble

Car ran better but still a little stumble. I’m going to back the timing off 2 or 3 degrees and retest. Will probably have to turn curb idle screw in to get the rpm back up.


Is it slow coming on the booster? That’s something I need to look at closer on some of the stuff I’m working on, and then figure out how soon (or delayed) it needs to be getting on the booster.

Then, what happens when you decide it’s slow getting on the booster, so you drop .004-.006 on the high speed air bleed. Now you’re on the booster sooner, but it goes rich at the top of the RPM range? What’s the next move???? Add a few thou to the lowest emulsion hole? If you have one hole lower do you use it with a .024-.026 hole?

This is stuff I need to work on and work out. So I’m curious what everyone else does when they need to get on the booster quicker but it goes rich up top.