Big Block Tunnel Ram 660s Questions

This comes up all the time. A bigger MAB will START the mains earlier. A smaller MAB will delay the start of the mains.

At low air flows the MAB is subject to very little pressure differential. So changing the MAB works the opposite of what most think.

If you want to delay the start of the mains, use a smaller MAB. It will be richer at higher air flows though.

IMO, most carbs have far too much MAB.
Thank you. So, I think my main issue is the stumble at about 2700-3000 regardless if under load (driving) or in park. Slowly opening the throttle, you can watch in the carbs and see it when it starts to stumble. Maybe I need to video what I am seeing. This is why I thought there may be a loss of signal on the carbs. Stab throttle from a rolling drive to WOT, it falls on its face, then recovers and pulls until I lift. Stab to 3/4 throttle and doesn't stumble at all. This seems like accelerator pump shot. These are 50cc center squirters. I changed one brown accelerator pump cam to upside down. This will give a large quick shot from one carb and a longer shot from the other. I can't drive the car due to winter, but it seemed to respond a bit when I was moving the car. Could I be losing signal on the boosters and making the air lazy when going to WOT? It seemed better when I had a much more restrictive air filter set up.