Choke/Carb question 1600

[ARowe84]

Hi all,

I’ve got a 1600 roadster. In regard to choke usage can somebody help me understand the following. Should pulling the choke just a little increase the idle without increasing mixture (ie without lowering the jets). Is this what’s called fast idle. Or does pulling the choke start increasing mixture right away.

I have used a carb sync at idle and then readjusted the dog bones to sync at 2000 rpm.

Thanks for clarifying,
Andy