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.
This shows the float inside...
This shows the float inside the bowl. The plastic "box" floats on top of the fuel to gauge the level in the bowl. The problems, however, start on a rough racetrack where the fuel is sloshing all around the bowl, which may require specific adjustments.
This shot shows the side of...
This shot shows the side of the metering block exposed to the fuel. Along the bottom of the metering block just below the power valve are the two jets. On high-bite racetracks the fuel in the bowl can be sloshed to the back and right-side of the bowl so much that the left-side jet can become uncovered. When this happens the engine will almost die in the turn.
When making quick adjustments...
When making quick adjustments in the pits, it can be easy to lose the gasket for the window plug. Make sure this stays on the plug or else it will create an annoying fuel leak.