How to properly drill carb jets?

12many said
Ahh, well that explains that! I got to a point where I needed to consider drilling bleeds etc for overly rich off idle cruise and either plugging or restricting the secondary bleeds to eliminate a hesitation when going wot quickly. Not really the carb for that sort of tuning. Still a nice carb though.

Seems like the rich off-idle cruise is just the way these carbs work, lots of people complain about that online. However it always seems to be "I don't like the numbers my AFR gauge is showing but it runs fantastic" so I'm just gonna roll with it. Haven't checked my spark plugs but I'm not too worried about it, others have said their plugs looked fine even though their O2 sensor showed it was rich. Not sure what exactly is going on there but I'm not going to lose sleep over it, also not going to spend any money on another carb, that's going to go towards a full MPFI conversion.

Even the owner's manual that comes with the carb says to target a 13.5:1 mixture at cruise using a wideband, seems pretty rich but that's what they say. I have a feeling it's designed to have a lot of "crossover" between the idle and primary circuits to give that excellent response.

It would be quicker, faster and more tune-able with a 750 double pumper but I'm not drag racing. I'd rather have a few extra MPG and be able to "set-it-and-forget-it".