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 the bowl. The plastic "box" floats on top of the fuel to gauge
This shot shows the side of the metering block exposed to the fuel. Along the bottom of th
When making quick adjustments in the pits, it can be easy to lose the gasket for the windo