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When cold, once all the way to floor to set the choke, then turn the key and it fires right up. That's when driving it every day. If I let it sit for several days, I have to pump twice then hold the throttle down about 1/2 way.
When warm, most of the time I don't have to pump at all but sometimes it takes holding the throttle about 1/2 way.
"Did you exchange a walk-on part in the war for a lead role in a cage?" - Pink Floyd
Never pump the gas pedal. I have an Aeromotive Street and Strip electric fuel pump. When I hit the ignition key position, the pump turns on and at the same time the starter turns over the engine. The engine might make a couple of rpm's but then it fires up.
One....just to set the choke and pump some fuel in the intake. Wait 3 seconds and start it. If you need to do more than that, you don't have the choke set up right...or the accelerator pump isn't working properly...
I mounted a chokeless Demon double pumper on mine. Same basic design as a mechanical double-pumper Holley. Fed by a factory-style mechanical fuel pump and 10 degrees of initial timing on a Comp Cams Magnum 292.
1 pump cold and lightly feather the throttle after start to clear its throat. Part throttle to none warm, gets mine back to idle.