So if you are experiencing stumbles and power drops in the turns, you may want to take a look at your float levels. The problem is if you are having these issues it's impossible to watch the carb while the car is on the track to see if the source is too much fuel causing it to slosh out of the bowl or too little fuel causing the jets to become uncovered. Hill says the key to knowing which way to go is to communicate effectively with your driver to find out exactly what is going on. He says fuel sloshing into the vent tubes will cause the engine to stumble, but it will pick the power back up quickly and get going again. If the jets are getting uncovered, however, the engine will often feel like it's "falling on its face" and just die for power. Understanding what your car is doing is the quickest route to finding the cure.

SOURCE
Holley