Carb tuning, accelerator pumps.

I have never left a .015 gap at the pump. I set it to zero. There is no reason not to. Some engineer got his panties wadded up about pushing the diaphragm over center. Years ago, I spent a bunch of time measuring stuff. You will coil bind the diaphragm spring before you kill the diaphragm itself.

So.....set your accelerator pump with zero clearance at wide open with this cam you are using. If you are foot braking, or using a stick, be prepared to START with a 37 squirter and go bigger until it cleans up the bog. You will need the big pump screw so the screw isn't the limit.

Working with a foot braked front engine dragster that went 8.3XX we needed a full 1/16 squirter (.0625) hole to make it leave. It wanted a butt load of fuel in a short time.

As stated above....smaller squirter is less fuel over a longer time period. Bigger squirter is more fuel over less time.

Some combinations want a ton of fuel right away. Give it what it wants.