only reason I have every "tied" one open,it was unhooked....would suck shut and stick some times

try that in rush hr traffic

q-jet comes to mind and had a one of those holley gas holes do the sticking choke thing also

I would unhook and strip all the q-jets down,including the flaper in the air horn,but found by just leaving it in there unhooked the q-jet got better mpgs

got a q-jet that just closes the flap and steps it up on fast idle,after its running the vac pull off opens the linkage for the flaper,tap the gas and the weight falls off fast idle

but the flapper is unhooked from the linkage...sort of a 1/2 manual choke thats controled by the throttle cable

instant start and on the fast idle,engine $uck$ flapper all the way open but stays on fast idle

1-2 mins,tap the gas it goes to curb idle and is ready

add at least a short piece of wire to the choke linkage on the carb to hold it open IMO