[DanEC]

I don't know about bone dry but my Corvette has to be primed after a couple of days. It has a 60s era bowl vent in addition to the throat vent so it gets cross ventilation to speed up drying out.

My GTX Edelbrock does a bit better - maybe 5 or 6 days before I have to prime. Carters and Edelbrocks have a pretty big fuel bowl vent.

My ERA with 600 Holleys seems to do the best. It's probably good for a week to 10 days.

They probably aren't bone dry at these periods, just too low to charge the accelerator pump and pull fuel in during initial cranking.

After that the amount of throttle pumping and cranking get too excessive for me to bear and I prime the front bowl until I see fuel drip out onto the throttle blade.